well, I got out the report on the other one I had mentioned in the summer. Now we are writing up a site along the Schuylkill River near Reading PA, they were obtaining and processing quartzite from riverbank cobbles, 24,000 artifacts (ya know, 23,500 waste flakes and 500 other things) 90 spearheads/knives/arrowheads, constant occupation from 10,000 BC - AD 1600. Most of the shaped formal tools are chert, flint and jasper, while the quartzite occurs a lot as utilized flakes and preforms. there is one period (Late Archaic) in which they made quite a few of the points out of quartzite) Unfortunately, its all mixed in the same plowzone.
Dave