Peru Earthquake May 31, 1970. Block of granodiorite.
Dates
Date Taken
1970
Summary
Peru Earthquake May 31, 1970. Block of granodiorite (estimated to weigh 700 tons) that was transported by the Huascaran debris avalanche to near the site of the former town of Ranrahirca. A layer of mud showing polygonal cracks resulted from seepage from the avalanche after it came to rest. The top of the block is covered with mud and rock fragments deposited by the avalanche after the block came to rest. 1970. Figure 6, U.S. Geological Survey Circular 639.
Summary
Peru Earthquake May 31, 1970. Block of granodiorite (estimated to weigh 700 tons) that was transported by the Huascaran debris avalanche to near the site of the former town of Ranrahirca. A layer of mud showing polygonal cracks resulted from seepage from the avalanche after it came to rest. The top of the block is covered with mud and rock fragments deposited by the avalanche after the block came to rest. 1970. Figure 6, U.S. Geological Survey Circular 639.
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