Earth’s Past The Geologic Time Scale Earth’s history is divided different sections of time The sections are determined by the living things and the rock record The geologic…

PowerPoint Presentation Warm Up, October 2nd, 2013 1) C-14 has gone through how many half-lives if itâs about 23,000 years old? What % is left if it starts at 80%? What…

Dating and the Past Dating and the Past Both can be painful Why is dating rocks important? It helps tell us how the Earth has changed Ex. Continental Drift  rocks that…

EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca Cephalopods Chambered Nautilus EARLY PALEOZOIC LIFE Metazoan Invertebrates Mollusca Cephalopods Chambered Nautilus Internal…

Index Fossils: Evolution and Biostratigraphy Evolution Variations exist within a population Result from mutations and other genetic accidents Some variations are advantageous…

Stratigraphy! The study of the rock layers of a planet! (I was going to say: “rock layers of Earth”, but…) GEOLOGIC DATING and STRATIGRAPHY There are two basic ways…