Emerged Holocene South American Shorelines

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Abstract
A pelecypod from the Salina beds of northern Peru at elevation 4.5 m ( 15 ft) shows a date of about 3000 years B. P., while a gastropod from elevation 22.5 m (75 ft) was older than 30,000 years B. P. A pelecypod from the island of Tierrabomba, near Cartagena, Colombia, at elevation 2.7 m ( 9 ft) gave a date of about 2850 years, while a pelecypod from Comodoro Rividavia, Argentina, at elevation 9 m ( 30 ft) gave a date of 5350 years B. P.