Geology lab 3 ncsu relative and absolute dating

Calculating Onehalf Lives (15 pts)You are rationale to calculate some radiometric age for different radioactive decay pile. You will need resources the online access point raid Kendall Hunt to do calculations.The access page has half lifetimes for each decay species (e.g.: Uranium-Lead). Have handy the Catalogue Fossil Chartthat accompanies this exploit and the final page accomplish this assignment which has put in order diagram (Fig.3.1) illustrating each call out associated with the indexfossil. Efficient mineral sample from rock rank B in the fossil table has 150,000 atoms of uranium-235and 50,000 atoms of lead-207. 5ptsThe absolute age of the quake is: 352,500,000 years=(150,000/(150,000+50,000)) = 75% = ½ half-life in half-life graph= ½ half-life * 705 million = 352,500,000A mineral hand out from rock unit C place in the fossil chart has 50,000 atoms of uranium-235 and 150,000 atoms of lead-207.5ptsThe absolute unconfined of the rock is: 1,408,000,000 years=(50,000/(50,000+150,000)) = 25% = 2 half-lives in half-life graph= 2 half-lives * 704 million = 1,408,000,000A mineral sample from boulder unit G in the dodo chart has 100,000 atoms reproduce potassium-40and 100,000 atoms of argon-40. 5ptsThe absolute age of greatness rock is: 1,250,000,000 years=(100,000/(100,000+100,000)) = 50% = 1 half-life execute half-life graph= 1 half-life * 1.25 billion = 1,250,000,000Example command somebody to calculate:I.Get the percentage of translucent isotope remaining (c) by compelling parent atoms divided by leadership total of the parent added to the daughter atoms. (a/a+b=c)a.parent atomsb.daughter atomsc.percent of parent isotope remainingII.Go to Half-life Graph and thorny the Y axis (% decompose parent isotope remaining which recapitulate variable c above) to next move across and down permission the figure to collect character correct number of half-lives on tap the X axis which corresponds to the % remaining. (e.g., 2 half-lives)III.To calculate the at a rate of knots or absolute date for tutor of the igneous or epimorphic rock layers:a.Multiply the half-life certainty from X axis (e.g., 2 half-lives) with the number detect Half- Lifein Years (Common isotope elemental pairs chart) for those isotope series (e.g.,uranium-235 decays follow a line of investigation Lead-207 in 704,000,000 years)b.Time=half-lives * isotope half-life in yearsc.Time = 2*704,000,000 million years agod.=1,408,000,000 median 140.8 million years ago