What two scales are used to measure geological time? Briefly describe each one.?

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What two scales are used to measure geological time? Briefly describe each one.?

2007-03-13 13:56:45 · 2 answers · asked by Catherine C 1 in Science & Mathematics ➔ Earth Sciences & Geology

2 answers

Relative age: Which layer of rock is older/younger than another, determined using the Principles of Geology.

Absolute age: Age in years of a layer of rock, usually determined by radiometric dating or a combination of radiometric dating and relative dating.

2007-03-13 14:07:16 · answer #1 · answered by Now and Then Comes a Thought 6 · 3⤊ 0⤋

Everything you need is here:

http://pubs.usgs.gov/gip/geotime/geotime.html

2007-03-13 21:00:46 · answer #2 · answered by Curiosity 7 · 0⤊ 0⤋