A geologic time scale is composed of standard stratigraphic divisions based on rock sequences and calibrated in years. What other type of animals appeared during the Jurassic period? If all of Earth time from the very beginning of the dinosaurs to today were compressed into 365 days (one calendar year), the dinosaurs appeared January 1 and ...
Jul 10, 2011 · well sorted, large scale cross-beds: terrestrial reptile traces: glacier - till: tillite: angular to rounded grains, poorly sorted, unstratified (massive) high energy environment with few fossils: glacier - outwash: sandstone, conglomerate: ripple marks, cross-beds, similar to stream channel: high energy, oxidizing environment with few fossils ...