Slide 1Fossils Slide 2 The earliest clues about life on earth are about 3.5 billion years old!!!! Slide 3 What are Fossils The remains of organisms that lived a long time…

Slide 1Radiometric Dating Slide 2 First Attempted in 1905 Compare U and Pb content of minerals Very crude but quickly showed ages over a billion years Skepticism about utility…

Slide 1 Slide 2 Warm Up/DO NOW 1. What causes geologic change (changes to the land) on earth? 2. What are the 3 types of plate boundaries? 3. Which plate boundary causes…

Slide 1 Slide 2 Radiometric Dating of Rocks 1896-1898 Radioactivity discovered by: Henri Becquerel and Marie and Pierre Curie. Slide 3 Slide 4 Phenomenon of Radioactivity…

Slide 1Fossils and evolution Rates of deposition of sediments Cooling of the Earth from a molten state Radiometric Dating Methods for Estimating the Age of the Earth Slide…

Slide 1©1998 Timothy G. Standish 1Thessalonians 5:21 Prove all things; hold fast that which is good. Slide 2 ©1998 Timothy G. Standish Timothy G. Standish, Ph. D. Radiometric…

Slide 1GEOLOGIC TIME Earths History Compressed: Slide 2 Slide 3 GEOLOGIC TIME I. Early Efforts of Dating the Age of the Earth Slide 4 GEOLOGIC TIME I. Early Efforts of Dating…

Slide 1©1998 Timothy G. Standish Timothy G. Standish, Ph. D. Radiometric Dating Slide 2 ©1998 Timothy G. Standish Dating Fossils Two methods: Relative dating - When a previously…

Slide 1Absolute Dating Using Radioactivity Slide 2 Absolute Age dating was major advance in Historical Geology – More accurate reconstruction of geologic events Mostly…

Slide 1Relative Age Dating Vs. Exact Age Dating How do geologists know how old something is? How old is the earth? How do geologists know how old something is? How old is…