Ever since Adrian Block's discovery of the Connecticut River in 1614, the extensive bar at its mouth has been an obstacle for mariners, preventing vessels of deep draft from entering. The runoff from the source of the river in Canada traveling . . . — — Map (db m182715) HM
Ever Since Adrian Block's discovery of the Connecticut River in 1614, the elusive bar at its mouth has been an obstacle to mariner, preventing vessels of deep draft from entering. The runoff from the source of the river in Canada . . . — — Map (db m227281) HM
Stone Walls
as increased farming began to change Litchfield's landscape, farmers discovered large deposits of granite and gneiss rocks in the ground. The farmers dug up and hauled away these stones as the land was cleared for crops and . . . — — Map (db m230289) HM
Lover’s Leap State Park is located in southern New Milford. The Housatonic River flows through the park and forms the headwaters of Lake Lillinonah. This historic 140 acre park began in 1971 when Catherine Hurd bequeathed her 52 acre estate to . . . — — Map (db m22739) HM
In the past, the shallow and stagnant Mill Pond was not a good place for marine life. In 1996-97, the City of Norwalk undertook a $500,000 project to improve the aquatic habitat. Funds for the work came from the Connecticut Department of . . . — — Map (db m53485) HM
Chapter 73 of the Delaware Code, Title 7 states: "…it is necessary and desirable that areas of unusual natural significance be set aside and preserved for the benefit of present and future generations before they have been . . . — — Map (db m273494) HM
Fort Delaware is located on Pea Patch Island in the Delaware River. The island is sometimes said to have gotten its name from a boat loaded with peas that ran aground on a mud shoal in the 1770s. The spilled peas sprouted, mud caught in the . . . — — Map (db m21589) HM
From Pencader Hundred shipping was possible by either the Delaware River of the Chesapeake Bay.
One third of the population of the United States now lives within a day's drive of Pencader Hundred.
The shortest distance overland between . . . — — Map (db m238426) HM
From Pencader Hundred shipping was possible by either the Delaware River of the Chesapeake Bay.
One third of the population of the United States now lives within a day's drive of Pencader Hundred.
The shortest distance overland between . . . — — Map (db m238420) HM
These boulders started out as igneous rocks formed beneath offshore volcanic islands. They contained the minerals quartz, plagioclase feldspar, and pyroxene. During the Taconic Orogeny they were subjected to extreme temperatures and pressures, . . . — — Map (db m271681) HM
Marble is the metamorphic form of the sedimentary rock Limestone.
These rocks are unlike all other rocks in Delaware because they are made predominantly of calcium carbonate, not quartz. In its pure form, marble is very white.
When it . . . — — Map (db m271686) HM
Molten magma deep within the Earth often rises towards the surface when continents collide. Gabbro forms when the magma slowly cools deep within the Earth, allowing relatively large crystals to develop. when gabbro weathers under hot and humid . . . — — Map (db m271679) HM
Iron Hill iron ore and chert are sedimentary rocks formed by the erosion of iron and silica out of gabbro during ancient hot and human climatic conditions. At first glance, they look similarly, but the iron ore has softer minerals, looks duller . . . — — Map (db m271685) HM
Pegmatite veins are found throughout the Piedmont. Pegmatites are igneous rocks with visible crystals. They form deep underground where high temperature and pressure causes sediments and rocks to melt. The melted minerals flow into fractures . . . — — Map (db m271618) HM
Sillimanite formed under conditions of high temperature and variable pressure during the Taconic Orogeny. Sillimanite's needle-like crystals are light gray, white and tan colored and have a texture similar to wood. Another name for sillimanite is . . . — — Map (db m271676) HM
A geological oddity
Many people call the huge rocks you see along this trail "blue granite" or "blue rock." This is because when they are broken, the fresh exposed rock is a brilliant blue color. Continued exposure to air soon gives them . . . — — Map (db m240819) HM
The highest bench mark monument in Delaware is located on Ebright Road. This horizontal control mark denotes an elevation of 447.85 feet above sea level. The Delaware Geological Society through its relationship with the National Geodetic Survey has . . . — — Map (db m269336)
The stones that make up the roll mill you are standing in are Brandywine blue gneiss, ("nice"). This metamorphic rock is harder than granite. This makes blue gneiss a perfect building material for structures housing large, industrial equipment . . . — — Map (db m304285) HM
A Garden to Teach and Inspire
Dogfish Head Craft Brewery made the Learning Garden a possibility when they purchased the naming rights to make this critical DBG educational venue. Construction of the Dogfish Head Learning Garden began on . . . — — Map (db m302732) HM
Along the boardwalk, you will see tidal wetlands fed by the Anacostia River, with a tidal range of two to three feet. These wetlands support people and wildlife by serving as a natural water filter, acting as a storage basin for floodwater, and . . . — — Map (db m294006) HM
A walk along this boardwalk will take you over one of the greatest environmental restoration efforts in Washington, D.C.
Starting in 1900, dredging, filling and other alterations to the Anacostia river, destroyed this marsh habitat. As a . . . — — Map (db m141724) HM
There is a river that flows from Andean slope in Peru at 4,886 meters above sea level down to the Pacific Ocean. The river travels 388 kilometers and its sections are called Pacco Pacco, Chilimayo, Colca, Majes, and Camana. Along the section of . . . — — Map (db m190140) HM
The first woman to reach the summit of the most dangerous mountain in the world - K2. The first European woman to conquer Mount Everest. One of the greatest climbers in history.
At the top of Mount Everest she left a small stone brought . . . — — Map (db m200429) HM
Used as a signal station
· by ·
Confederate soldiers under
Gen. Jubal A. Early
during the attack on
· Washington ·
July 11 and 12, 1864
Also used by
Confederate Sharpshooters
The lower plaque reads:
Two cannon balls . . . — — Map (db m42698) WM
You are standing on what remains of Rock Creek's Piney Branch stream valley. The valley was once a forested, 2,500-acre network of springs, seeps, and wetlands that reached almost to Takoma Park, Maryland. Today, houses, apartment . . . — — Map (db m151242) HM
What Is a Meadow?
A meadow is more than just an open field. Meadows are diverse, dynamic habitats dominated by herbaceous plants, including native grasses and wildflowers.
Why Are Meadows Important?
Meadows provide cover, food, . . . — — Map (db m211404) HM
Natural floodplains protect people and wildlife. Floodplains, the low-lying areas adjacent to rivers, include wetlands, a valuable ecosystem. Wetland trees and aquatic plants, such as cattails, wild rice, and spatterdock slow floodwaters and . . . — — Map (db m297946) HM
Here the Anacostia River has been dredged and channeled. The former marshland is gone, and the wildlife that lived in its waters and along its banks has mostly disappeared.
But the river is not dead. A few miles upstream at Kenilworth Marsh, . . . — — Map (db m297950) HM
This stone is one of four Cardinal Direction Markers that honor the four directions—north, east, south, and west. Representatives of Native communities in Canada, Maryland, Chile, and Hawai'i selected a meaningful stone from their region. . . . — — Map (db m211259) HM
This stone is one of four Cardinal Direction Markers that honor the four directions—north, east, south, and west. Representatives of Native communities in Canada, Maryland, Chile, and Hawai'i selected a meaningful stone from their . . . — — Map (db m211257) HM
This stone is one of four Cardinal Direction Markers that honor the four directions—north, east, south, and west. Representatives of Native communities in Canada, Maryland, Chile, and Hawai'i selected a meaningful stone from their . . . — — Map (db m211256) HM
Four hundred years ago, the Chesapeake Bay region abounded in forests, meadows, wetlands, and croplands. The National Museum of the American Indian restores these environments and is home to more than 27,000 trees, shrubs, and herbaceous plants . . . — — Map (db m144387) HM
The Alachua Sink, a named likely derived from the Potano word meaning “jug,” is the deepest of Paynes Prairie’s sinkholes and acts as a conduit for water entering the Floridan aquifer at a rate of up to 6 million gallons per day. . . . — — Map (db m126294) HM
Devil’s Millhopper
has been designated a
Registered Natural Landmark
This site possesses exceptional value
as an illustration of the Nation’s natural
heritage and contributes to a better
understanding of man’s environment
. . . — — Map (db m125200) HM
Hundreds of years ago, the Everglades stretched across 3 million acres from Lake Okeechobee to Florida Bay. Today, it is half that size - this makes mitigation efforts essential!
Mitigation Means …
Reducing the force or . . . — — Map (db m271873) HM
Hemenway
This tree has been home to countless raptors and wading
birds over the centuries. You can see it is sprinkled with
bromeliads and blanketed by resurrection fern; scaled by
Virginia creeper and a strangler fig; weathered, . . . — — Map (db m267683) HM
Ichetucknee Springs
Has been designated a
Registered Natural Landmark
under the provisions of the
Historic Sites Act of August 21, 1955
this site possesses exceptional value
in illustrating the natural history of the United . . . — — Map (db m126019) HM
500 Spanish soldiers from St. Augustine marched four days through marsh, forest tangle, fierce wind, and heavy rainfall to an encampment near here. Exhausted and hungry they rested in a downpour; at dawn they attacked and captured France's Fort . . . — — Map (db m46579) HM
Bound by the Nassau River, the Atlantic Ocean, and the St. Johns River, the Timucuan Ecological and Historic Preserve seeks to protect much of the water and undeveloped land you see from here. Salt marsh, coastal hammock, tidal creeks, and sea and . . . — — Map (db m46576) HM
If you flew over Pensacola Bay, you would see that it has many natural forms of protection. Sandy barrier islands defend the narrow entrance into the bay and rolling hills provide excellent vantage points to watch ships arrive. The many colonial . . . — — Map (db m130741) HM
In this area, the St. Marks River disappears into sinkholes several times and reappears as springs. Here, it flows underground through a cavern and reappears 150 feet to your right. This has formed a land bridge which has been used by wild . . . — — Map (db m157204) HM
Rainbow Springs has been designated a Registered Natural Landmark
Under the provisions of the Historic Sites Act of August 21, 1935
This site possesses exceptional value in illustrating the natural history of the United States
U.S. . . . — — Map (db m13618) HM
This 10-minute walk up to the top of the Hobe Mountain Observation Tower will give you a view of the Atlantic Ocean, Intracoastal Waterway, and the entire expanse of the park. As you walk through the Sand Pine Scrub (Vanishing plant Community) . . . — — Map (db m226371)
In his 38 years representing
the people of South Florida in Congress,
Dante Fascell had many accomplishments.
The view before you is perhaps one of his greatest. — — Map (db m267834) HM
The Tamiami Trail was crucial to opening up the wilderness and creating a link to Florida's major cities. Building a road through the heart of the Everglades was no easy task, but with the power of human ingenuity the builders were able to . . . — — Map (db m132100) HM
On this spot of land at the mouth of the Miami River, a historic discovery shed new light on one of Florida's early peoples - the Tequesta. During the demolition of the Brickell Point apartments in 1998, archaeologists uncovered preshistoric . . . — — Map (db m292489) HM
Over the past several million years, the seas have risen and fallen many times. There were times when Florida became very small and even disappeared due to being covered by water. What we know as Florida is only the top of a larger area, known as . . . — — Map (db m225802) HM
The B-57 is a modified version of the English Electric Canberra which was first flown in Britain on May 13, 1949. In March 1951 the USAF contracted the Glenn L. Martin Co. to build the B-57 in the US under a licensing agreement with Britain. The . . . — — Map (db m102699) HM WM
To the memory of Dr. Howard Atwood Kelly of Baltimore, Maryland, one of the founders of Johns Hopkins Hospital and medical school. He was a great surgeon, teacher and medical authority, and above all, a Christian gentleman.
Dr. Kelly, in 1927 . . . — — Map (db m66834) HM
Rock Springs is the source of the Rock Springs Run, a swift running stream with an average flow of 26,000 gallons per minute and a constant temperature of 68 degrees. The spring flows from limestone containing fossils that date back 17 million . . . — — Map (db m94341) HM
This petrified wood is over 80,000,000 years old. The trees originally grew in the Triassic Period. After the tree died, it was buried by sediment and saturated with water rich in silica. Eventually the makeup of the wood was replaced by silica and . . . — — Map (db m237650) HM
In the 1880's, and before, when settlements in Osceola County were just beginning, there were few roads as such, mainly wagon trails and no bridges over Single Creek. The road west, Vine Street led to three Fords named after Jim Yates (also called . . . — — Map (db m204486) HM
Historic Kissengen Spring is located approximately one mile north of this location. At one time the spring discharged up to 20 million gallons of water a day into the Peace River. The spring’s pool was 200 feet in diameter and reached a depth of 17 . . . — — Map (db m67655) HM
By the turn of the twentieth century, Simpson and Company was shipping lumber as far away as Scandinavia. Following the deaths of the partners in the Simpson Company the lumber mill was sold in 1903 to Thomas R. Lyon of Chicago, who renamed it . . . — — Map (db m100331) HM
Submerged aquatic vegetation is an important part of the Northwest Florida ecosystem. It is defined as any combination of seagrasses and algae that covers 10 to 100 percent of the riverbottom. Many of these plant species grow in underwater . . . — — Map (db m100329) HM
This area, so named for its outcroppings of yellow limestone, was the home of Sarasota's first inhabitants-the pre-historic and Calusa Indians. Yellow Bluffs later became the homesite of William H. Whitaker, Sarasota's first known white settler. . . . — — Map (db m41293) HM
About 200 yards south-east of this point are the remains of the King's Coquina Quarries. (Coquina, a type of limestone composed of mollusk shells and sand, is found along the north-east coast of Florida.) Coquina was used in the building of many . . . — — Map (db m28361) HM
Park development started in 1963 on this hill, which has an elevation of 322 feet and a limestone base. A stream flowing from the hill plunges over a cliff and disappears through an underground channel. Some sinks and caverns are near the falls, . . . — — Map (db m73295) HM
Throughout history our rivers have been used and abused. Conservation enhances the valuable uses of our river, and protects the plant and animals of our river community.
Our rivers are brown because of poor farming and construction practices . . . — — Map (db m207646) HM
This ridge, interrupted only by major streams, extends south from the Altamaha River in Georgia to the Santa Fe River in Florida, a distance of 130 miles. It is an ancient barrier beach formerly many miles off-shore in the sea which covered this . . . — — Map (db m12423) HM
The wonderful healing powers of the waters of Indian Spring were known to the Indians before the pioneers blazed the trail of civilization in Georgia. Such were their belief and confidence in the medicinal virtues of the waters that they came with . . . — — Map (db m404) HM
The road E. ascends Taylor’s Ridge & via Nickajack Gap, crosses E. Chickamauga Cr. Valley. May 7, 1864. Brig. Gen. Judson Kilpatrick’s (3d) Div., Elliott’s Cav. Corps (Army of the Cumberland) [US], moving from Ringgold, crossed Taylor’s Ridge at . . . — — Map (db m19394) HM
Gray's Reef is one of the largest near shore, live-bottom reefs in the southeastern United States. One January 16, 1981, President Jimmy Carter designated it as Gray's Reef National Marine Sanctuary, bringing it into the National Marine Sanctuary . . . — — Map (db m301240) HM
The origin of both this lake and its name are a mystery as the source of water is unknown and analysis has shown no lime in the soil. The lake which reputedly “has no bottom” formerly served as a baptismal pool for the adjacent Salem . . . — — Map (db m40380) HM
Bluffs and Ripple Marks
One of the characteristics that makes Cloudland Canyon State Park distinct from almost all other Georgia state parks is its rugged geographic features. Aside from the deep canyons, two specific geologic attributes can . . . — — Map (db m242272)
This site is described in the treaty signed by the Creek and Cherokee Indians at Augusta, Georgia, in 1773. Here began the survey of the ceded lands. — — Map (db m15712) HM
This highway runs along the divide between the Atlantic Ocean and the Gulf of Mexico. On the south the waters run into the Broad and Savannah rivers to the Atlantic Ocean. Waters on the north run into Chattahoochee and Apalachicola rivers and the . . . — — Map (db m21065) HM
During the 21 years (1924–1945) in which he was a constant visitor to Warm Springs, Ga., Franklin D. Roosevelt became familiar with the scenic beauties of field & forest in the environs. The splendid isolation of Dowdell’s Knob, with its . . . — — Map (db m43137) HM
Pine Mountain to the south makes a complete loop forming a beautiful basin 4 miles in diameter known as `The Cove.` It is joined on the south by Oak Mountain, another hard quartz ridge. Flint River has avoided an easier course on either side and has . . . — — Map (db m9053) HM
Trickles of water running down old Indian paths to springs formed the Providence Canyons, natural wonders of the Southeast.
These canyons, named for an old church that had to be moved out of their path, are often called “Little Grand . . . — — Map (db m46392) HM
The sand clay formation here represents the first prominent Coastal Plain deposits laid upon an ancient floor of granites and gneisses. Southward this formation (Tuscaloosa Upper Cretaceous) becomes more and more deeply buried and contains marine . . . — — Map (db m27177) HM
The name is derived from the Cherokee word ltse’yi (New Green Place) or (Place of Fresh Green, from ltse’hi (green or unripe vegetation), and yi, the locative. It occurs in several places in the old Cherokee country, variously spelled Echia, Echoee, . . . — — Map (db m32706) HM
The high, rounded peak, Brasstown Bald or Mt. Enotah, is the highest mountain in Georgia, 4,748 ft. Its Indian name, Itseyi, means “a place of fresh green,” referring to its grassy, instead of timbered, summit. Early white settlers . . . — — Map (db m32729) HM
One and one tenth mile south-southeast from this marker is the geographic center of the state. The center is defined as the balance point of a plane or thin sheet of a uniform thickness in the shape of the area.
The central point is . . . — — Map (db m49532) HM
Blood Mountain, elevation 4458 ft. Chattahoochee National Forest. In Cherokee mythology the mountain was one of the homes of the Nunnehi or Immortals, the “People Who Live Anywhere,” a race of Spirit People who lived in great townhouses in the . . . — — Map (db m3259) HM
The high rounded peak to the south with lookout tower is Brasstown Bald or Mount Enotah, the highest mountain in Georgia 4,748 feet above sea level. Its Indian name, Itseyi, means “place of fresh green” and refers to its grassy instead . . . — — Map (db m32613) HM
The first obstacle facing the Federal Army in the September 1863 invasion of Walker County was getting over Lookout Mountain. Cooper's Gap, Stevens' Gap, and Dougherty's Gap proved to be serviceable. "Ascertaining that the rebels were just . . . — — Map (db m168059) HM
Jesse Stephens was a famer living at the base of the mountain. Although the Federal records usually misspelled his name as Stevens, the name of the gap and road are derived from him. The 1860 Federal Census shows him as a 54 year old Georgia native. . . . — — Map (db m168071) HM
Okefenokee Swamp, 400,000 acres of waterways, swamp prairies and floating islands is a region of many legends. Here DeSoto’s men told of trees that turned to warriors, Indians hunted and fished in its fastnesses and fled to safety on its islands . . . — — Map (db m53058) HM
First called Lexington, Shoals was the site of what was probably the first woolen mill and iron foundry in Georgia. In 1794, Col. William Bird, Revolutionary soldier from Pennsylvania, and Benjamin A. Hamp bought several thousand acres of land . . . — — Map (db m37372) HM
This valley has long fascinated travelers, writers and artists. It was farmed for centuries by Indians and white men alike. The valley was devastated by Spanish and American gold hunters and timbermen and has been carefully nurtured by prosperous . . . — — Map (db m43706) HM
Otherwise known as Buzzard Roost. This natural gateway through Rock Face Ridge, was heavily fortified by Confederate forces at Dalton, after their
retreat from Missionary Ridge.
February 25, 1864, the Federal 14th A.C., Dept. of the Cumberland, . . . — — Map (db m11069) HM
Otherwise known as Buzzard Roost. This natural gateway through Rock Face Ridge was heavily fortified by Confederate forces at Dalton after their
retreat from Missionary Ridge. February 25, 1864, the Federal 14th A.C., Dept. of the Cumberland, . . . — — Map (db m11072) HM
South Point Complex has been designated a Registered National Historic Landmark under the provisions of the Historical Sites act of August 21st 1935. This site possesses exceptional value in commemorating and illustrating the history of United . . . — — Map (db m2314) HM
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
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
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
'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
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
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
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
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
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
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
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
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
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
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