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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 51 (1967)

Issue: 7. (July)

First Page: 1346

Last Page: 1353

Title: Geology Near Huallacocha Lakes, Central High Andes, Peru

Author(s): Thomas S. Szekely (2)


Recent field work near the Huallacocha lakes has defined structural features in a narrow fold-and-fault or thrust belt near the Continental Divide. The rocks deformed include Paleozoic metamorphics, Permian to Cretaceous sedimentary and volcanic formations, and Tertiary terrigenous clastics. There is a large thrust sheet of Upper Cretaceous limestone which was probably formed in latest Cretaceous time and which was thrust from the southwest. Deformation occurred in early or medial Tertiary time and the structures, which strike northwest, include tight folds, reverse faults which change at depth to thrusts directed toward the northeast, and a zone of imbricate thrusts previously recognized by Harrison (1960). Tectonism is considered to be related to the formation of Yauli ome, directly northeast, during Tertiary time.

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