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Terrestrial Origins and Evolution
Darting Minnow Creek event deposit with Chicxulub impact spherules near the base (boots of G. Keller are on Chicxulub spherule deposits). Thin-bedded sandstones overlie the glauconite, phosphate and spherule-rich deposits. The K-T boundary is above the event deposit, but difficult to access in the Creek bed. Credit: GSA


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