USGS professional paper · 1927 · 36 citations · 0 references
Natural SciencesEarth SciencesGeologyEnvironmental GeologyQuaternary GeologyStratigraphyFossil Community ReconstructionFossil Distribution PatternsFossil PlantsFossil RecordQuaternary PaleoecologyTransitional FossilsCarboniferous Plant FossilsClassification Of Mineral ResourcesContinental Margin Mineral ResourcesFossil FloraPaleoethnobotanical EvidenceRegional GeologySilurian Plant Fossils