Earth's First Steps: Tracking Life Before the Dinosaurs |
Common terms and phrases
abundant amphibians animals arroyo began Berman Bingaman bone Bone Wars Burgess shale Carnegie Museum Coconino collected collectors Conifer Cruces Dave debris Dimetrodon dinosaur tracks Doug Dune Canyon Early Permian earth Edaphosaurus environment Eryops evidence excavation exposed fauna feet field fossil footprints fossil tracks fossil trackways geology hillside hoax hundred hunt insects invertebrates kind knew Las Cruces layers look marine Marsh material Mexico Tech miles million years ago motherlode mud flat Museum of Natural Natural History Museum Nicholas Hotton III Nick Hotton outcrops paleontological paleontologists Paleozoic pelycosaur plants predators prehistoric preserved quarry red beds reptiles Robledo discovery Robledo Mountains Robledo tracks Robledo trackways rock sand scientific scientists sedimentary sediments Senator shoreline significance slabs Smithsonian species specimens Sphenacodon surface tail drag terrestrial thing Thom tion track maker track sites trackways trails variety vertebrate Walchia walked wanted