Geochemical data for sedimentary rocks and bentonites from the U.S. Cretaceous Western Interior Seaway

Geochemical data were generated and compiled for sedimentary rocks and bentonites deposited in the Cretaceous Western Interior Seaway from 15 drill cores and 1 outcrop spanning present-day Texas to Alaska. These data were collected to better understand Cretaceous source rocks and petroleum systems of the United States. These data accompany a manuscript that will be submitted to a journal for publication that focuses on evaluating the silicon and zirconium proxy for geochemically identifying biogenic silica. These data include lithofacies assignments, total carbon, total organic carbon, programmed temperature pyrolysis, and whole rock elemental chemistry.