Flint, Williamson County, Texas
County: Williamson County, Texas
Chemical formula: SiO2 (microcrystalline quartz)
Specimen size: 5 x 4 x 2.5 inches
Specimen weight: 760 grams
Collection reference: no reference number
Collected by Linda McCall. In the collection of the Jackson School of Geosciences at the University of Texas at Austin.
Prehistoric flint knappers (chipping arrow and spear implements) long ago recognized that Georgetown flint was a truly superior material. They must have systematically sought out primary natural exposures and combed through downstream gravel bars in the rivers and streams along the edge of this area of Balcones Escarpment. Numerous artifacts including very large and especially thin bifaces were made from this material, some found at sites hundreds of miles from the source. For instance, several of the large Gahagan knives that were included as Early Caddo grave offerings at the George C. Davis site in Cherokee County in east Texas are made of Georgetown material. The flint is also known from Clovis caches dating to 11,000 B.C (or earlier) and in archeological contexts dating throughout prehistoric times.
Georgetown flint is a fairly localized material from the Edwards Limestone formation that occurs in primary context in the only in Williamson County and probably in southern Bell County. There is, however, a very similar material found in limestone quarries in Hays County that knappers regard as a ‘close cousin’ to Georgetown flint.