Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; December 1963; v. 53; no. 6; p. 1361-1366
© 1963 Seismological Society of America
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Effects of the earthquakes of May 1960 and geologic relations in Rio Negro

HERBERT THOMAS, WILLIAM BOWES, NELSON BRAVO S., ALDO MORAGA and Pierre Saint-Amand

INSTITUTO DE INVESTIGACIÓNES GEOLOGICAS, SANTIAGO, Chile
U. S. ATOMIC ENERGY COMMISSION
U. S. NAVAL ORDNANCE TEST STATION, CHINA LAKE, CALIF.

Abstract

Damage to the town of Rio Negro was extensive along a long thin ridge lying between Rio Forrahue and Rio Llay-Llay and on the adjacent banks. The damage was largely produced by mass movement, although the actual oscillatory ground movement may have been greater on the higher parts of the ridge. A possible north-south fault is indicated. The subsoil is glacio-fluvial sands and gravels. Recommendations for reconstruction are given.






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