Near Cresent in Klamath County, Oregon — The American West (Northwest)
About 7,700 years ago Mt. Mazama erupted torrents of seething, red-hot pumice and other volcanic rocks. These glowing avalanches raced down the slopes and flooded the valley that lay here with deposits over 100 feet (30 m) deep.
Even after thousands of years, few trees have become established on the Pumice Desert. There is ample water under the surface, but deficiencies in the soil limit plant growth. Many more years will pass before the surrounding lodgepole pines transform the desert to a forest.
(Inscription within the drawing of Mt.Mazama)
Avalanches of heated rocks ejected by Mt. Mazama flooded downhill. Mostly pumice and scoria, the porous rocks discharged gasses that buoyed up the flow. Some rocks travelled up to 25 miles (40 km) beyond this point.
Erected by National Park Service.
Topics. This historical marker is listed in these topic Environment • Natural Features.
Location. 43° 1.636′ N, 122° 7.161′ W. Marker is near Cresent, Oregon, in Klamath County. Marker is on North Crater Lake Highway, on the right when traveling south. The marker is located within the boundaries of Crater Lake National Park on the north entrance road south of the intersection of North Crater Lake Highway and East Diamond Lake Highway. This is a seasonal highway and is closed in the winter. Touch for map. Marker is in this post office area: Crescent OR 97733, United States of America. Touch for directions.
Other nearby markers. At least 6 other markers are within 9 miles of this marker, measured as the crow flies. Ancient Spirits (approx. 6˝ miles away); Whitebark Pines (approx. 7.3 miles away); After the Collapse (approx. 8 miles away); Before the Collapse (approx. 8 miles away); Glacial Valleys (approx. 8.1 miles away); Stephen Tyng Mather (approx. 8.1 miles away).
Credits. This page was last revised on October 19, 2020. It was originally submitted on February 8, 2013, by Don Morfe of Baltimore, Maryland. This page has been viewed 431 times since then and 17 times this year. Photos: 1. submitted on April 14, 2020. 2, 3, 4. submitted on February 8, 2013, by Don Morfe of Baltimore, Maryland. • Syd Whittle was the editor who published this page.
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