Harry Williams, Historical Geology1 Introduction: The standard geologic time scale was not developed in an organized and systematic manner. Instead, the.
The Geologic Time Table ESRT pg 8&9. Most all divisions on this table are based on life-events that have occurred in the past Eras are divided based.
Fish The Earliest Vertebrate Animals A.Urochordates (tunicates) B.Cephalochordates (amphioxus) C.Craniata (fishes)
Paleozoic Geology Floods, Glaciers, and The Birth of Pangea.
Natural Sciences 360 Legacy of Life Lecture 10 Dr. Stuart Sumida PHYLUM CHORDATA Subphylum VERTEBRATA FISHES.
Texas Through Geologic Time. Precambrian Precambrian Enchanted Rock, Fredericksburg, TX.
Precambrian Eukaryotes Acritarchs Ediacaran Vendian.