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Filters: Date Range: {"choice":"year"} (X) > Contacts: Plafker, George (X)

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Peru Earthquake May 31, 1970. Field west of the Rio Shacsha that was pockmarked by boulders hurled cross the Rio Shacsha valley. Most of the rocks are projectiles derived from the Huascaran debris avalanche. June-July 1970.
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Peru Earthquake May 31, 1970. Flooding of a residential area in southeastern Chimbote where the ground settled substantially because of compaction of water- saturated sediments. 1971.
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Peru Earthquake May 31, 1970. Block of granodiorite estimated to weigh about 7,000 metric tons that was transported by the Huascaran debris avalanche and deposited near the Rio Santa west of Ranrahirca. The top of the block is covered with boulders that were deposited from the debris flow after the block came to rest. This block was left exposed after the enclosing mud flowed and/or was washed away after the avalanche. The pole at the base of the block is 4 meters high. June-July 1970.
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Peru Earthquake May 31, 1970. Lower part of the Huascaran debris avalanche: Yungay, Ranrahirea, Matacoto, Cemetery Hill in Yungay, overtopped ridge between the Rio Shacsha and Yungay. The combined Yungay and Ranrahirea debris lobes cover an area of about 8 kilometers and probably contain close to 50 million meters of material. June 1970.
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Peru Earthquake May 31, 1970. Nevados Huascaran and the Huascaran debris avalanche that destroyed Yungay and Ranrahira. Portion of figure 2, U.S. Geological Survey Circular 639.
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Peru Earthquake May 31, 1970. Impact crater 15 meters long, 11 meters wide, and 2.5 meters deep made by the large light-colored block in the crater which has dimensions of about 2 by 2 by 3 meters. Most of the other rocks, including the large dark-colored one in the crater, are glacial deposits that predate the avalanche. June-July 1970.