Huntingdonshire Dc Mea Green Force Launch 8th May 2009
Absolute Dating 8.3
Chapter 8: Rocks and Minerals Section 2: Rocks Section 3: Rock Cycle.
Absolute Dating. J F M A M J J A S O N D J Earth Forms Earth Cools First Life Abundant Oxygen Multicellular Organisms Plants and Animals Dinos 15-25 Humans.
Radiometric Dating of Rocks 1896-1898 Radioactivity discovered by: Henri Becquerel and Marie and Pierre Curie.
Fossils and evolution Rates of deposition of sediments Cooling of the Earth from a molten state Radiometric Dating Methods for Estimating the Age of the.
29.3 A BSOLUTE T IME. H ISTORICAL M ETHODS Counting rigs in trees – more accurate, but cannot calculate very old material.
Age Dating of Rocks. Question: How do we know how old rocks are? How do we know how old rocks are?
Dating the Earths Rocks. Quantitative Geologic Time Early estimates Calculation based on: Old Testament – Earth is 6,015 years old James Ussher (1581-1656)
Radioactive dating. III. Radioactive Dating A. Used to find ABSOLUTE age in years. B. Radioactive ISOTOPES in rocks DECAY away at a predictable rate.
The Changing Earth. Early on, it was recognized that the layers in geological strata represent periods in the earths history and contain fossils of organisms.