https://www.usgs.gov/publications/cretaceous-anuran-and-dinosaur-footprints-patuxent-formation-virginia
Footprints of an anuran (gen. et sp. indet.), a theropod dinosaur (Megalosauropus sp.), and an ornithopod dinosaur (Amblydactylus sp.) have been recovered from...
dinosaur footprintspatuxent formationcretaceousanuran
https://www.usgs.gov/publications/grain-size-segregation-and-levee-formation-geophysical-mass-flows
Data from large-scale debris-flow experiments are combined with modeling of particle-size segregation to explain the formation of lateral levees enriched in...
grain sizesegregationleveeformationgeophysical
https://www.adda247.com/question-answer/a-geological-formation-that-is-essentially-impermeable-to-the-flow-of-water-even-though-it-may-contain-water-in-its-pores-is-called/q.v1.385c3b5e-e0e8-4f6a-83bb-6fa913093604-en
An aquiclude is a geological formation that contains water but does not transmit it due to its impermeability.
geological formationessentiallyimpermeableflow
https://www.usgs.gov/media/images/metasedimentary-rocks-apple-creek-formation
USGS scientist Art Bookstrom looks at puzzling sedimentary structures in metasedimentary rocks of the Apple Creek Formation, near the Jackass prospect, near...
apple creekmetasedimentaryrocksformationu