cretaceous-tertiary boundary clay (raton formation, 65 ma; southern colorado, usa) color palette

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#65605C #3F3732 #B49757 #ACA08C #907A61

related tags: 3C3835 3F3732 62605E 65605C 84796C 907A61 9D8E6E A49E94 ACA08C B49757 boundary clay colorado cretaceous dinosaur extinction fallout formation kt layer raton tertiary