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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Crater Lake in Klamath County, Oregon — The American West (Northwest)
 

After the Collapse

Mount Mazama

 

—Crater Lake National Park —

 
After the Collapse Marker image. Click for full size.
By Don Morfe, June 29, 2009
1. After the Collapse Marker
Inscription. About 6,800 years ago, at the climax of a series of dramatic eruptions, the top of Mt. Mazama collapsed. Left behind was the huge crater, or caldera, you see today. But before the caldera filled with water, there were more eruptions.

The most striking evidence of post collapse volcanic activity is Wizard Island, the small volcano in front of you. Its symmetrical cone was formed by a fountain of cinders which erupted from the caldera floor. On the left side of the caldera, a similar cone appeared, but today it lies hidden 496 feet (151 m) below the lake surface.

Geologists believe that lava flows which erupted after the collapse helped to seal the fractured caldera floor, allowing melting snow and rain to accumulate.
 
Erected by National Park Service.
 
Location. 42° 54.78′ N, 122° 8.496′ W. Marker is in Crater Lake, Oregon, in Klamath County. Marker can be reached from Rim Drive, on the right when traveling north. Click for map. Marker is located within the boundaries of Crater Lake National Park at a lookout area on the western side of Crater Lake. Marker is in this post office area: Crater Lake OR 97604, United States of America.
 
Other nearby markers. At least 4 other markers are within 8 miles of this marker, measured as the crow flies. Before the Collapse (here, next to this marker); Stephen Tyng Mather
Wizard Island - Crater Lake image. Click for full size.
By Don Morfe, June 29, 2009
2. Wizard Island - Crater Lake
(approx. 0.2 miles away); Glacial Valleys (approx. ¼ mile away); Pumice Desert (approx. 8 miles away).
 
Also see . . .  After the Collapse. A waymarking.com posting with photos of the marker and additional information. (Submitted on March 3, 2013.) 
 
Categories. EnvironmentNatural Features
 
Crater Lake image. Click for full size.
By Don Morfe, June 29, 2009
3. Crater Lake
Crater Lake image. Click for full size.
By Don Morfe, June 29, 2009
4. Crater Lake
 
 
Credits. This page originally submitted on , by Don Morfe of Baltimore, Md 21234. This page has been viewed 328 times since then and 6 times this year. Photos:   1, 2, 3, 4. submitted on , by Don Morfe of Baltimore, Md 21234. • Syd Whittle was the editor who published this page. This page was last revised on June 16, 2016.
 
Editor’s want-list for this marker. A full view of the marker. • A wide area view of the marker and its surroundings. • Can you help?
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