What is the evidence that sea levels dropped at the end of the triassic in north America?

Evidence of sea level drop at the end of the Triassic in North America includes geological formations and sedimentary records showing a shift from marine to terrestrial environments. The presence of distinct boundary layers, characterized by a lack of marine fossils and increased continental deposits, indicates significant regression of the sea. Additionally, isotopic studies and paleontological data suggest changes in climate and sedimentation patterns consistent with a global sea level decline during this period.