L-161 (Utica Chert): Provenience includes gravel deposits; Unknown collection procedure; Not a collection from a archaeological context; Collection includes raw material, outer surface, and ...
MADISON — The strikingly banded rocks scattered across the upper Midwest and elsewhere throughout the world are actually ambassadors from the past, offering clues to the environment of the early Earth ...
L-1543 (Big Fork Chert): Direct collection from outcrop. Provenience includes bedrock. Not a collection from archaeological context. Known collection procedure. Collection includes raw material, outer ...
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