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Natural Features Topic

 
Mauna Ulu Marker image, Touch for more information
By Barry Swackhamer, September 4, 2017
Mauna Ulu Marker
301 Hawaii, Hawaii County, Pāhoa — Mauna Ulu
On May 24, 1969, a series of lava fountains erupted from a fissure which extended roughly from Aloi to Alae craters. The fountains soon concentrated between the two craters. Mauna Ulu, a new lava shield, was forming. By mid-summer of 1970, lava . . . Map (db m111017) HM
302 Hawaii, Hawaii County, Pāhoa — Mokumanamana is a place of spiritual and geologic transition
As these massive volcanoes move away from the hot spot, they cease to erupt, and slowly erode to become atolls, lagoons, and expansive sholes of coral reef. The island of Mokumanamana rises from the sea about halfway along the island chain and . . . Map (db m111014) HM
303 Hawaii, Hawaii County, Pāhoa — Nature's Untamed Forces Unite to Sculpt Sea Arches
Examine natures's creative handiwork, from the lava forged cliffs ma uka (uphill) of you, to the wave-battered Hōlei Sea Arch standing sentinel against the coastline. Sea arches, characterized as erosional remnants of a once-continuous sea . . . Map (db m111010) HM
304 Hawaii, Hawaii County, Pāhoa — The islands of Hawai'i begin here
'O ka lipolipo, 'o ka lipolipo In the unfathomable darkness, dark blue, and bottomless... Kumulipo, a Hawaiian creating chant, tells of the fiery beginnings of the earth that began in the primordial darkness of Pō. Just . . . Map (db m111011) HM
305 Hawaii, Hawaii County, Pāhoa — Vast coral reefs create a world of abundance
It takes 10 million years for a new Hawaiian island to subside and erode to sea level, yet its foundation continues to support life far beyond that. Upon the back of the eroded mountain range, tiny corals build extensive reefs. Due to their age . . . Map (db m111016) HM
306 Hawaii, Hawaii County, Volcano — Explosive eruptions rock Kīlauea volcano
Oli (chants) and mo'olelo (stories of this region recount the celebrated battle between Pelehonuamea (Pele, the volcano deity) and her sister, Hi'iakaikapoliopele (Hi'iaka), that erupted here at the summit of Kīlauea. After a series of . . . Map (db m111041) HM
307 Hawaii, Hawaii County, Volcano — KilaueaRising Smoke Cloud — Hawaii Volcanoes National Park —
A caldera has likely existed at Kilauea’s summit for as long as has the volcano. Collapse occurred repeatedly as magma swelled the summit area and then drained rapidly through the flanking rift zones. Large fault blocks have formed here and at . . . Map (db m104768) HM
308 Hawaii, Hawaii County, Volcano — Mauna Loa
In front of you looms the world's largest active volcano The summit of Mauna Loa stands 20 miles ahead of you, reaching an elevation of 13,677 feet above sea level and more that 31,000 feet above the ocean floor. With a volume of 10,000 . . . Map (db m111040) HM
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309 Hawaii, Hawaii County, Volcano — The "Firepit" of Halema'uma'u
Halema'uma'u Crater is the site of the most eruptions at the summit of Kilauea Volcano. Between 1905 and 1924, a period of about 20 years, a dazzling lake of molten lava circulated within its walls. Then, in 1924, the lake drained away, allowing . . . Map (db m26233) HM
310 Hawaii, Hawaii County, Waimea — Pu'uhuluhuluDaniel K. Inouye Highway
What is a kīpuka? Pu'uhuluhulu, a 500-year old patter cone, is a kīpuka ( an older oasis within a newer lava flow). It preserves native plants and acts as a seed bank to revegetate the more recent lava flows that surround it. . . . Map (db m110790) HM
311 Hawaii, Kauai County, Poipu — 1 — Spouting Horn ParkKōloa Heritage Trail — Ka Ala Hele Waiwai Ho‘olina o Kōloa — Preserving the Heritage of Po‘ipū & Kōloa —
Spouting Horn Park was called puhi, or blowhole, by early Hawaiians. Legends tell of a huge mo‘o, or lizard, caught in this puhi, which was formed when waves eroded softer, underlying rocks and wore through the harder top rock. Water rushing into . . . Map (db m12764) HM
312 Hawaii, Kauai County, Poipu — 8 — Makawehi & Pā‘ā DunesKōloa Heritage Trail — Ka Ala Hele Waiwai Ho‘olina o Kōloa — Preserving the Heritage of Po‘ipū & Kōloa —
The eastern sand dunes of Makawehi, calm face, and Pā‘ā, hard rock, yield fossilized plant roots, bird bones, crab claws and other treasures. Prior to extensive wave erosion, this prominent limestone ridge extended across Keoneloa Bay. . . . Map (db m12859) HM
313 Hawaii, Kauai County, Poipu — 9 — Pu‘uwanawana Volcanic ConeKōloa Heritage Trail — Ka Ala Hele Waiwai Ho‘olina o Kōloa — Preserving the Heritage of Po‘ipū & Kōloa —
More than 5 million years ago, a hotspot in the earth spewed lava upward to form the volcanic mountain island of Kaua‘i. Nearby Hā‘upu Ridge and Mountain contain some of the oldest geologic formations. Look for the youngest volcanic cones, such . . . Map (db m12864) HM
314 Hawaii, Maui County, Hana — Haleakala National ParkKipahulu: Costal District
< The landscape of Haleakala National Park rises from a lush valley beneath a waterfall at sea level to a red desert of cinder cones here at the volcanic summit of Haleakala. An astounding array of climates and life zones lies in between. Yet the . . . Map (db m62199) HM
315 Hawaii, Maui County, Kula — Haleakalā National ParkSummit District
The landscape of Haleakalā National Park rises from a lush valley beneath a waterfall at sea level to a red desert of cinder cones here at the volcanic summit of Haleakala. An astounding array of climates and life zones lies in between. Yet the . . . Map (db m71753) HM
316 Hawaii, Maui County, Wailuku — Kūka‘emoku — [ʻĪao Valley] —
Commonly called ʻĪao Needle, the traditional Hawaiian name for this 2,250 foot high peak is Kūka‘emoku. This peak is known as the phallic stone of Kanaloa, Hawaiian god of the ocean. During periods of warfare, the peak was . . . Map (db m31540) HM
317 Idaho, Ada County, Meridian — 193 — Initial Point
All Idaho land surveys refer to a beginning point --"Initial Point"-- 16 miles directly south of here. When he began surveying Idaho in 1867, Lafayette Cartee, first surveyor general of Idaho Territory, established the initial point on a . . . Map (db m53439) HM
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318 Idaho, Bannock County, Downey — 171 — Red Rock Pass
You are standing in the outlet of ancient Lake Bonneville, a vast prehistoric inland sea, of which Salt Lake is modern remnant Covering over 20,000 square miles when it overflowed here about 14,500 years ago, its winding shoreline would have . . . Map (db m105831) HM
319 Idaho, Bannock County, Lava Hot Springs — 13 — Lava Hot Springs
Long before white men discovered these springs, Sept. 9, 1812, Indians gathered here to use the free hot water. Except wheen they found hot springs, pre-historic Indians had a hard time getting hot water. The wove watertight baskets into . . . Map (db m124585) HM
320 Idaho, Bannock County, Lava Hot Springs — Lava Hot Springs' healing waters
(This marker is composed of series of photographs and their captions.) Good for what ails you! Idaho's hot springs have drawn people to them for hundreds, if not thousands, of years. Long before indoor plumbing and hot water . . . Map (db m108255) HM
321 Idaho, Bingham County, Blackfoot — 436 — Big Butte
Big Butte Towering 2500 feet high, two over lapping rock domes form a 300,000 year-old butte that dominates this lava plain. After a hot flow of molten rhyolite (acidic rock) boiled up through older lava, a second rhyolite dome pushed up a . . . Map (db m103820) HM
322 Idaho, Bingham County, Blackfoot — 287 — Lava Formations
Molten rock, forced upward for 30 to 50 miles through fissures in the earth, has cooled into the hard lava found here. Continued pressure from below has made great cracks in the contorted surface. This lava solidified only a few thousand . . . Map (db m108346) HM
323 Idaho, Bingham County, Blackfoot — 428 — Three Buttes
Three Buttes Rising above this level plain of lava flows and windblown soils these high landmarks are recent additions to Idaho’s landscape. East Butte (farthest east) flowed up and cooled quickly about 600,000 years ago, while Big Southern . . . Map (db m103818) HM
324 Idaho, Blaine County, Bellevue — Timmerman Junction Oregon Trail Kiosk
(Five panels in the kiosk deal with the history of Goodale's Cutoff and the surrounding area) Idaho's Emigrant Trails Westward-bound emigrants entered Idaho after crossing Thomas Fork Valley. They soon encountered the climb . . . Map (db m110138) HM
325 Idaho, Blaine County, Ketchum — 292 — Salmon River
Rising as a small stream in the valley to the south, the Salmon winds 420 miles across Idaho before flowing into Snake River. Discovered in 1895 by Lewis and Clark, and explored with great difficulty by fur traders and prospectors, the . . . Map (db m110050) HM
326 Idaho, Boundary County, Bonners Ferry — 321 — Glacial Lakes
Moving from the north down this valley, the edge of the continental ice sheet blocked rivers and formed glacial lakes. Then as the ice gradually melted, a lake rose here behind the receding ice dam, and extended up Kootenai valley into . . . Map (db m122174) HM
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327 Idaho, Boundary County, Bonners Ferry — Moyie River Canyon
[front side] Constructed in 1964, the 1223 ft. long steel truss bridge spans the Moyie River Canyon at a height of 464 ft. It replaces the old bridge built in 1923 and 1¼ miles of narrow, winding highway. It is the second highest bridge in . . . Map (db m73505) HM
328 Idaho, Butte County, Arco — A Plain of Volcanoes
The shallow arc of Idaho’s Snake River Plain spans southern Idaho, gently rising from west to east. Current theories suggest that the plain marks the path of continental movement over a deep hotspot now lying beneath the Yellowstone Plateau. As the . . . Map (db m71602)
329 Idaho, Butte County, Arco — Are We Loving Them to Death?
Walking off trails may be destroying these spatter cones which are some of the rarest volcanic features on the face of the earth. Photographs taken at different times demonstrate that unrestricted visitor use left these fragile volcanic cones . . . Map (db m80429) HM
330 Idaho, Butte County, Arco — Big Cinder Butte
On old maps, this region was referred to as "the Cinder Buttes." Towering above the surrounding landscape by more than 700 feet (200 meters) and spreading across an area of more than three square miles (eight square kilometers) the tallest and . . . Map (db m140015) HM
331 Idaho, Butte County, Arco — Boy Scout CaveCraters of the Moon National Monument and Preserve
Look for lava and ice stalactites ("lavacicles" and "icicles") on the ceiling and walls of this lava tube. They were formed by dripping hot lava and melting ice. Born of fire, this cave now retains ice year-round—a cool place to visit on a hot . . . Map (db m92943)
332 Idaho, Butte County, Arco — Goodale's Cutoff
Beginning in the 1850s, armed skirmishes broke out between Shoshone Indians and emigrants traveling by wagon train to the west. Many pioneers tried new paths through Idaho that would avoid the Snake River, where they were most vulnerable to attack. . . . Map (db m140017) HM
333 Idaho, Butte County, Arco — Indian TunnelCraters of the Moon National Monument and Preserve
Indian Tunnel is named for the mysterious stone circles that lie near the path to this large lava tube. Ancient stone structures are visible in many locations throughout the Monument. Archeologists believe that some of these structures may have had . . . Map (db m183501)
334 Idaho, Butte County, Arco — Just Down the RoadCraters of the Moon National Monument
The Strangest 75 square miles on the North American continent Comment from an early traveler The landscape before you was explosively created by volcanic eruptions. Cracks in the earth's crust allowed lava to blast, plop, . . . Map (db m92942)
335 Idaho, Butte County, Arco — Silent Cone
This silent volcano made some noise approximately 6,500 years ago when eruptions ejected cinders and pumped out lava from the crater. Today, the shady north-facing slope of this cinder cone supports a forest of Limber pines and a few larger . . . Map (db m140026) HM
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336 Idaho, Butte County, Arco — Vanishing Landmark
From this vantage point, you gaze across 25 miles of lava to Big Southern Butte. Early pioneers, following Goodale’s Cutoff from the Oregon Trail, used this land mark to navigate around the rugged lavas of the Snake River Plain. As a traveler today, . . . Map (db m70595) HM
337 Idaho, Butte County, Arco — Volcanoes Along the Rift
Before you lies the Great Rift, a 52-mile (84 kilometer) long system of fissures which a chain of volcanoes erupted. Crescent Butte is the oldest of these cinder cones, created during the earliest eruptions here about 15,000 years ago. North . . . Map (db m140027) HM
338 Idaho, Butte County, Arco — Where's the Volcano?
Say the word volcano and usually the image flashes to mind of a single great symmetrical cone. But, the volcanic activity in Craters of the Moon National Monument and the Snake River Plain has taken a different form. Parallel cracks in the . . . Map (db m71601)
339 Idaho, Butte County, Howe — 227 — John Day’s River
John Day’s River Fur traders named this stream for John Day, a pioneer trapper who died in the valley north of here, Feb. 16, 1820 John Day had started west with John Jacob Astor’s Pacific Fur Company that discovered Snake River . . . Map (db m103827) HM
340 Idaho, Caribou County, Grace — Black Canyon Gorge
Bear River has its source in lakes on the north slope of Hayden Peak, 12,485 feet in elevation, near the western limit of Utah's high Uintas. The horseshoe shaped river follows a course 500 miles long, but its mouth is only 90 miles from its source. . . . Map (db m140343) HM
341 Idaho, Caribou County, Grace — Lava Flows and Wagon Trains
Geological processes created the complex landscape of southeastern Idaho and eventually determined the routes covered wagons would take along the Oregon Trail. In their journals, trail emigrants often wrote something about the two volcanic cinder . . . Map (db m140253) HM
342 Idaho, Caribou County, Soda Springs — "It Roars Like a Mad Dragon"S.E. Matthews, Soda Springs Geyer Corporation, December 1937
Many Oregon & California bound emigrants mention seeing ten to twelve foot hight white mounds and cones in their diaries and journals while passing through the Soda Springs area in the mid-1800s. Often, one of the first natural curiosities that . . . Map (db m106251) HM
343 Idaho, Caribou County, Soda Springs — 220 — Bear River Lava
Until about 28,000 years ago, Bear River used to flow northwest from here through Portneuf Canyon into Snake River. Then these lava eruption blocked that route, diverting Bear River south into what now is Salt Lake. At that time a large . . . Map (db m106728) HM
344 Idaho, Caribou County, Soda Springs — China Hat Geological Site
Noticeable for their distinct shapes, China Hat and nearby China Cap are rhyolite domes that intruded and pierced the basalt of the Blackfoot Lava Field. The basaltic phase of this volcanic province was active in middle Pleistocene around 500,000 . . . Map (db m105966) HM
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345 Idaho, Caribou County, Soda Springs — Coach History
In 1958, Dr. Evan and Lois Kackley donated the Yellowstone Coach to the City of Soda Springs. According to Dr. Kackley's written letters to the city council he stated, "This particular coach was used to carry Pres. Theodore Roosevelt and the . . . Map (db m106694) HM
346 Idaho, Caribou County, Soda Springs — Guiding Landmark...Sheep Rock
Towering 1200 feet above the waters of Bear River is Sheep Rock, a prominent landmark described in emigrant diaries and journals as they traveled west on the Oregon and California trails. Trapper and mountain men, in the early 1830s, indicate that a . . . Map (db m106737) HM
347 Idaho, Caribou County, Soda Springs — 385 — Hooper Spring
Free clear sparkling soda water still is available in a beautiful Soda Springs city park located 2 miles from here. A prime attraction for more than 160 years, soda water from these springs was marketed nationally after rail service . . . Map (db m106256) HM
348 Idaho, Caribou County, Soda Springs — Sheep Rock Geology
Lava eruptions west of Sheep Rock at least 140,000 years ago blocked the Bear River from draining into the Snake River system. Instead, the Bear was forced to drain into what was then Lakes Thatcher and Bonneville to the south. The Bear River's . . . Map (db m106847) HM
349 Idaho, Caribou County, Soda Springs — 158 — Soda Springs
In this area are a group of springs famous to Oregon Trail travelers, most of whom stopped to try the "acid taste and effervessing gasses" of the waters. Earlier, fur traders often -- less elegantly -- called the place "Beer Springs" after . . . Map (db m105967) HM
350 Idaho, Caribou County, Soda Springs — Travertine Terraces - World Famous Water
The gently sloping mound around the geyser is travertine. The stone often develops into flights of pools enclosed within little dams. These dams form through a mix of water and carbon dioxide which makes carbonic acid, and dissolved calcium . . . Map (db m109952) HM
351 Idaho, Caribou County, Wayan — 433 — Cariboo Mountain
Rising to an elevation of more than 9,800 feet, Cariboo Mountain -- visible north of here -- has two of Idaho's highest gold camps. Jesse "Cariboo Jack" Fairchild discovered gold high on Cariboo Mountain in August, 1870, and a mining rush . . . Map (db m105965) HM
352 Idaho, Cassia County, Almo — Distant Views
This vast scene holds many intriguing stories. If the land could speak, it would tell of pioneers and wagons crossing the wide Ralf River Valley from Strevell Pass to Emigrant Canyon bound for California in 1843-1882. The land would speak of stage . . . Map (db m123956) HM
353 Idaho, Cassia County, Almo — Twin Sisters
They rise in a cone-like form from the bottom of the valley to a height of from 400 to 600 feet they are round and quite regular in form, tapering gradually to a point. -- Emigrant journal entry (Sawyer) describing the Twin Sisters, circa . . . Map (db m123994) HM
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354 Idaho, Cassia County, Oakley — 344 — City of Rocks
A vast display of towering granite rocks (16 miles southeast of here) attracted emigrants who were on their way to California. A gold rush visitor, July 14, 1849, reported that "you can imagine among these massive piles, church domes, spires, . . . Map (db m31637) HM
355 Idaho, Cassia County, Oakley — Granite Pass
One day west of the City of Rocks: Never saw such dust! In some places it was actually to the top of the forewheels! Fine white dust; more like flour. Our men were a perfect fright, being literally covered. -- Emigrant journal entry, circa . . . Map (db m124025) HM
356 Idaho, Clark County, Dubois — Fort Henry Historic BywayBattle of Camas Meadows
( six panels are located beneath the interpretive site shelter:) A Region Where History Was Made The scenic routes shown on this map will take you to several historic and scenic landmarks in northeastern Idaho. You will . . . Map (db m124526) HM
357 Idaho, Clearwater County, Weippe — Weippe Prairie
This marker was dedicated 1957 to commemorate the arrival of the Lewis and Clark Expedition at Weippe Prairie, Idaho, Sept. 23, 1805. Also to honor the memory of Dr. J.T. Moser who pioneered here in the 1890's and to honor the memory of his . . . Map (db m121440) HM
358 Idaho, Clearwater County, Weippe — Weippe Prairie
Welcome to Weippe Prairie This has always been a traditional gathering place for the Nez Perce people where camas bulbs are harvested and baked each year. The blue flower of the camas lily grow so thick here in the spring time that from . . . Map (db m121610) HM
359 Idaho, Custer County, Mackay — Earthquake! - The Event
There are no records from explorers’ journals or pioneers’ memories of earthquakes occurring in this area. Scientists have not detected activity in recent time. But, old fault scars indicate that earthquakes occurred before. Geologists recognized . . . Map (db m109708) HM
360 Idaho, Custer County, Mackay — Earthquake! - The Results
• The scarp before you extends for 21 miles, paralleling the mountain front. In some places, multiple scarps formed. • Ground motion, or “ground roll,” did $15,000,000 damage to roads and buildings in the Challis and Mackay areas. . . . Map (db m109709) HM
361 Idaho, Custer County, Mackay — Earthquake! - The Stage
Idaho is part of the world’s longest mountain chain above sea level. This chain extends from the tip of South America to Alaska’s north coast. The widest section is in the western United States - from the Sierra Nevada to the Rocky Mountains. The . . . Map (db m109706) HM
362 Idaho, Custer County, Mackay — 356 — Earthquakes
On October 28, 1983, a major earthquake fracture, 26 miles long and 7 miles deep, surfaced as Lost River Valley slid away from Mount Borah. During that rock shift, Mount Borah’s ridge front rose about 6 inches, while this valley subsided 9 . . . Map (db m109704) HM
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363 Idaho, Custer County, Mackay — 229 — Goodin's River
Known as Goddin's River in the days of the fur trade. This stream originally was named for the trapper who discovered it. Thyery Goddin, a prominent Iroquois who explored this river in 1819 or 1820, had come here with Donald Mackenzies fur . . . Map (db m109705) HM
364 Idaho, Custer County, Mackay — 45 — Mount Borah
Idaho’s highest peak, 12,662 feet, is named for William E. Borah, who served in the United States Senate from 1907 until his death in 1940. Ten or a dozen large but shallow inland seas have covered this area in the past billion years. They . . . Map (db m109703) HM
365 Idaho, Custer County, Stanley — The Boiling Fountain
Alexander Ross and his Hudsons Bay Company fur trappers were the first white men to visit these hot springs. His dairy describes camping "at the boiling fountain" when they came here on October 1, 1824. Hot springs result when hot water reached . . . Map (db m110040) HM
366 Idaho, Elmore County, Mountain Home — 4 — Site 4 ★ Hot SpringsMain Oregon Trail Back County Byway
Saturday August 16 "...we passed a hot springs near the foot of the same range, the water of which was nearly at a boiling temperature, so that one could not hold is finger in it, and a dog careless stepping across it put one foot in and ran . . . Map (db m125752) HM
367 Idaho, Franklin County, Preston — 432 — Old Delta Sediments
Diverted into this valley by lava flows, the Bear River deposited a huge, mostly red clay delta here where it entered a vast inland sea that covered much of Utah. About 14,500 years ago , its shoreline suddenly went down about 80 feet . . . Map (db m105834) HM
368 Idaho, Franklin County, Weston — 553 — Pass of the Standing Rock
The Pass of the Standing Rock was held sacred by the ancient ones of the Shoshone and other Native American Tribes long before John C. Fremont's exploratory party came to Weston Canyon on August 29, 1843. Fremont's surveyors spent the entire day . . . Map (db m140345) HM
369 Idaho, Fremont County, Ashton — Teton Mountain RangeLes Trois Teton or , The Three Breasts
John Colter after serving with the Lewis and Clark Expedition journeyed to the Teton Yellowstone Country in 1807, and became the first mountain man to see the Teton Mountain Range. Early fur trappers gathered in the valley at the base of the Teton . . . Map (db m108571) HM
370 Idaho, Fremont County, Ashton — 396 — Volcanic Calderas
Volcanic Calderas Some 2,000,000 years ago, massive eruptions of hot rock boiled for 60 miles from this high rim on across Yellowstone Park. An exceptionally large crater remained when that lava surface collapsed. Another smaller caldera . . . Map (db m103937) HM
371 Idaho, Gooding County, Bliss — Formation of Malad Gorge
Thousands of years ago, immense flows of water from alpine glaciers and high levels of precipitation sent waters cascading over a broad area of the Snake River Canyon directly into the Snake River. Weak joints in the basalt walls gave way to these . . . Map (db m71547)
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372 Idaho, Gooding County, Bliss — 300 — Fossil Beds
Fossil bones of zebras, beaver, otter, pelicans and other water birds are found in sediments left from a 3,400,000 year old pond on the bluff across the river. Lava flows, pouring out over the plains on this side, met and dammed up sedimentary . . . Map (db m31598) HM
373 Idaho, Gooding County, Bliss — The Malad SpringsOne of the Largest in the Country
Few places in Idaho or the United States show evidence of spring water more clearly than in Malad Gorge. These springs flow from the vast Snake River Aquifer through porous pillow basalts. On the opposite side of the canyon, where the river widens, . . . Map (db m71549)
374 Idaho, Gooding County, Bliss — Woody's Cove / The Hagerman Valley
Woody's Cove This deep, basalt canyon was formed similar to Malad Gorge – by a retreating cataract, a huge waterfall. About four million years ago, local volcanoes spewed enormous amounts of lava over the area. Then, about one . . . Map (db m71593)
375 Idaho, Gooding County, Hagerman — A Changing Climate
Idaho was a very different place during the Pliocene Epoch (three to four million years ago). Like much of the planet, this area was warmer and more humid, with annual rain fall of 20 inches. Studies of ancient pollen found in the sand and clay . . . Map (db m139552) HM
376 Idaho, Gooding County, Hagerman — Ancient Lakes
Can you find traces of the three ancient lakes that helped form Hagerman Valley and preserved the fossils found here? The first, known as Lake Idaho, covered most of present-day southwestern Idaho about three to eight million years ago. Over time, . . . Map (db m139556) HM
377 Idaho, Gooding County, Hagerman — Sediments and Fossils
The rock layers in the bluff across the river are made of sediments - particles of sand, silt, and clay. These layers, called strata, were carried here by the ancient Snake River and were deposited as the river entered an ancient lake. This process . . . Map (db m139554) HM
378 Idaho, Gooding County, Hagerman — Volcanoes Along the SnakeLava Landscape
The features before you testify to a fiery volcanic past. Distant hills, called buttes, are actually "shield" volcanoes. Named for their shape, these shield volcanoes formed when lava flowed from cracks, or vents, in the earth's crust. Over the past . . . Map (db m139611) HM
379 Idaho, Idaho County, Grangeville — The Camas Connection
Before the continent was called America, before settlers came looking for land, the Nez Perce people lived and traveled throughout a vast area we now know as Idaho, Oregon, and Washington. They lived a semi-nomadic lifestyle, following the growing . . . Map (db m141249) HM
380 Idaho, Idaho County, Kooskia — The Lolo Trail"I belong to the land from which I came." Toohoolhoolzote
(This marker is composed of two panels and is presented here as if the panels were joined.) The land today looks much the same as it did to Lewis and Clark. Today, as stewards of this beautiful land, we have an opportunity to leave a . . . Map (db m123213) HM
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381 Idaho, Idaho County, Riggins — From The BeginningRiggins’ Geologic History, Flora and Fauna — Salmon River Heritage Waking Tour —
Before recorded history, the area we know as Riggins was on the west coast of the North American Continent. Thousands of miles to the west was the Pacific Plate, covered by ocean with only a few high points rising above the water. This plate was . . . Map (db m119411) HM
382 Idaho, Idaho County, White Bird — 298 — Salmon River
A vast mountain wilderness, cut by the mile deep Salmon River Canyon stretches across Idaho south and east of here. Travel through the Salmon River Mountains always was hard in the early days. An 1872 railroad survey showed the Salmon . . . Map (db m109667) HM
383 Idaho, Jerome County, Twin Falls — 326 — Emigrant Road
More than a century ago, fur trappers and emigrants followed an old Indian trail that crossed here on its way to Oregon. Hudson's Bay Company traders preferred this route between Fort Hall and Fort Boise, but early emigrant wagons had to . . . Map (db m31500) HM
384 Idaho, Kootenai County, Coeur d'Alene — 170 — Coeur d'Alene Lake
Look to the north: blocking the northward passage of the rivers which form this lake, a great dam of glacial ice once towered above the horizon as far as the eye can see. When the glacier melted, about 600,000 years ago, it left a moraine - a . . . Map (db m122872) HM
385 Idaho, Kootenai County, Harrison — 281 — Submerged Valley
Glacial activity about 9000 to 12000 years ago created this lake out of what previously had been the valley of a river. The ice sheet occupied major valleys north of here. As the glacier receded, melt waters flooded across the outlet of this . . . Map (db m122125) HM
386 Idaho, Kootenai County, Hauser — 256 — Purcell Trench
A long, glaciated valley, extending from British Columbia this far into Idaho, brought part of a continental ice sheet past here thousands of years ago. Rocks and boulders transported here by glacial ice backed up Lake Coeur d'Alene. Then a . . . Map (db m122127) HM
387 Idaho, Lemhi County, Carmen — William Clark's "Pirimids"
Clark's "Pirimids" are lessons in erosion and deposition. Looks closely at the columns to see layers of sediment: sandstone, gravel, and larger rocks that were eroded from ancient hills and deposited in valleys millions of years ago. Time and . . . Map (db m123683) HM
388 Idaho, Lemhi County, Tendoy — "Immence Ranges of High Mountains Still to the West of Us..."- Meriwether Lewis, August 12, 1805
Filling in the Blanks The maps of North America carried by Lewis and Clark showed only a vast, uncharted space between the Mandan villages of the Missouri Rier and the Pacific Coast. The mountains separating the Missouri and Columbia . . . Map (db m109507) HM
389 Idaho, Lemhi County, Tendoy — Agency CreekLooking West to the Salmon River Country
First Taste of the Columbia "we proceeded on to the top of the dividing ridge from which I discovered immence ranges of high mountains still to the West of us with their tops partially covered with snow. I now decended the mountain . . . Map (db m109543) HM
390 Idaho, Lemhi County, Tendoy — Crossing the Great DivideCorps of Discovery
High Point of the Journey "thus far I had accomplished one of those great objects on which my mind has been unalterably fixed for many years.," wrote Meriwether Lewis, 456 days after setting out from St. Louis. Lewis, George . . . Map (db m109504) HM
391 Idaho, Lemhi County, Tendoy — The Withington CalderaLewis and Clark in Lemhi County
About 50 million years ago, this was one of the most violent landscapes on Earth. A sub-surface mass of molten rock rose and subsided in cycles, spewing gas, mineral fragments and ash in explosions hundreds of times more powerful that an atomic . . . Map (db m109446) HM
392 Idaho, Lewis County, Nezperce — 372 — Camas Prairie
Most of Camas Prairie's wind blown soil rests upon Columbia River lava flows. Coming from a series of widespread eruptions, they covered older, eroded granite rocks here some 6 to 17 million years ago. Some earlier volcanic extrusions, . . . Map (db m140897) HM
393 Idaho, Madison County, Rexburg — 301 — Menan Buttes
Menan Buttes Two cones of glassy lava are located directly south of here. The largest rises 800 feet above the surrounding plain. Hot molten lava, erupting from great depth, met cold surface water in the wet flood plain of Snake river: the . . . Map (db m103901) HM
394 Idaho, Madison County, Rexburg — 267 — The Three Tetons
The Three Tetons The giant peaks to the southeast were a famous early western landmark known to fur hunters and mountain men. Perhaps as early as 1819, French-speaking trappers were calling them the Trois Tetons - - the three breasts. More . . . Map (db m103907) HM
395 Idaho, Nez Perce County, Lapwai — Ant & Yellowjackettámsoy ka・?alatálo
The basalt arch on the hillside across the road depicts támsoy ka・?alatálo, insects Ant and Yellowjacket, locked in combat. Many features in this river valley relate to nimi・pu・ (Nez Perce) traditional stories. . . . Map (db m121414) HM
396 Idaho, Nez Perce County, Lapwai — Clearwater Riverkú・s kayxkáyx
For thousands of years the river scene at this village site hardly changed. The stream was full of fish, served as a trade route for neighboring tribes, and attracted wildlife to this green corridor. While the river fostered a life of bounty and . . . Map (db m121715) HM
397 Idaho, Oneida County, Holbrook — Twin Springs Historic SiteCurlew National Grassland
Twin Springs is an oasis amid rolling hills of sagebrush; or as the early pioneers described "an endless sea of Artemisia". Wildlife, birds and people are drawn to Twin Springs' still water and rich grasses. Indigenous people traveled this valley . . . Map (db m124144) HM
398 Idaho, Oneida County, Keogh — 317 — Lake Bonneville
20,000 years ago, this land was under water. Not far to the north, you can see the old shore of Lake Bonneville. Formed in a basin from which no river reached the ocean, this became the largest lake in North America. Finally the lake rose high . . . Map (db m32888) HM
399 Idaho, Owyhee County, Marsing — 192 — Owyhee Country
The name applied to these mountains and the whole surrounding region is an outdated spelling of the word "Hawaii". Fur-trading ships brought Hawaiian natives -- then called "Owyhees" -- to the Northwest. In 1818, Donald Mackenzie brought the . . . Map (db m110212) HM
400 Idaho, Payette County, Fruitland — 263 — Snake River
The valley of the Snake, historic passage from the Midwest to the Northwest, has been a primary route for travel since the days of Indians and fur traders. The Oregon Trail forded the river at Old Fort Boise, the Hudson's Bay Company 12 miles . . . Map (db m23195) HM

1806 entries matched your criteria. Entries 301 through 400 are listed above. ⊲ Previous 100Next 100 
 
 
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May. 17, 2024