Geologic Time Introduction

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=NFmdlRMO8II

What is Geology?Tenets of geology. Divisions of of geologic time. Radioactive isotopes: their origin and how they are used to calculate the age of rocks

Physical, science, geologic, time, radioactive, isotopes, nuclides, uranium-lead, rubidium-strontium, etc
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