Earth Sciences 2240F/G Chapter 2: EARTHSCI 2240F - Chapter 2
13 Sep 2018
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Introduction: the age of the earth: attempts to measure the age of the earth began with the biblical chronology of. Archbishop ussher placed the earth at 4004b. c that would mean it is only barely. Earth gradually accreted from the same solids that compose the asteroids: oldest mineral = crystal of zircon. Identified: the same layer in different parts of the country based upon its fossil content. Te(cid:374)o(cid:859)s pri(cid:374)(cid:272)iple of uperi(cid:373)positio(cid:374), hutto(cid:374)(cid:859)s pri(cid:374)(cid:272)iple of cross-cutting relationships and. (cid:373)ith(cid:859)s pri(cid:374)(cid:272)iple of fau(cid:374)al u(cid:272)(cid:272)essio(cid:374) (cid:449)ere used to (cid:373)at(cid:272)h sedi(cid:373)e(cid:374)tary strata see(cid:374) i(cid:374) o(cid:374)e region with sedimentary strata exposed in another region. Composite stratigraphic column arranges sedimentary strata according to age. 2. 0 absolute age dates (or clocks in the rocks: henri bequerel discovered that some of the atoms of some chemical elements: uranium are inherently unstable and breakdown in a predictable fashion, = radioactivity.
