The Arkadelphia Marl is a geologic formation in Arkansas in Clark, Nevada, and Hempstead counties. It preserves fossils dating back to the Cretaceous period.
The Arkadelphia Marl is a geologic formation in Arkansas in Clark, Nevada, and Hempstead counties. It preserves fossils dating back to the Cretaceous period. (en)
The Arkadelphia Marl is a geologic formation in Arkansas in Clark, Nevada, and Hempstead counties. It preserves fossils dating back to the Cretaceous period. (en)