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El Sauz chert: physical and chemical characterization of a long-used lithic resource in south Texas (2016)
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El Sauz chert is a lithic resource in south Texas that was used to make stone tools dating from Early Archaic (3500-6000 BC) to Late Prehistoric (AD 700) times. Located in Starr County, Texas a few miles north of the Rio Grande are two chert quarries associated with altered rhyolitic ash of the Catahoula Formation. Given its restricted occurrence, El Sauz chert offers a unique opportunity to study prehistoric exchange and resource procurement. Tools of this chert are common east of the...