HOUSTON – (May 25, 2023) – Visually striking layers of burnt orange, yellow, silver, brown and blue-tinged black are characteristic of banded iron formations, sedimentary rocks that may have prompted ...
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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