Anonymous
Image: Sumit crater of Mount Martin, June 4, 1990, photo taken by C. Neal, U.S. Geological Survey
Reliability Quote of the Day
ISSN 2329-0099
Description
View of the summit crater of 1,863-m (6,112 ft)-high Mount Martin volcano, a largely ice-covered stratovolcano at the southern end of the Katmai group in Alaska. Note the sulfur (yellow) that has been deposited on the snow- and ice- covered crater walls.