Rocks store information from long ago. For instance, their composition can reveal the environmental conditions during their formation. This makes them extremely important in climate research. This led ...
L-223 (Iowa Chert): Unkown colelction procedure. Collection includes raw material, outer surface, and heat-treated specimens. L-223 (Iowa Chert) (Information obtained from Burlington Type Sheet - ...
L-1241 (Oil Chert): Direct collection from outcrop. Not a collection from archaeological context. Unknown collection procedure. Collection includes raw material, outer surface, modern flint-knappers' ...
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