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Author Question: In the last few years improvements in technology have allowed geologists to date single grains of ... (Read 77 times)

nevelica

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on: Feb 28, 2020
In the last few years improvements in technology have allowed geologists to date single grains of some minerals in rocks. A geologist separates 5 grains of the mineral zircon, which can be dated by the Uranium-lead method, and the crystal retains parent and daughter through weathering, erosion, and deposition. Thus, dating each mineral grain only gives the age of the source rock that was eroded, to produce that sand, from which the zircon grain is derived. The 5 grains yield ages of 160, 110, 2020, 66, and 162 million years. What do these ages tell you about the age of the sedimentary strata?
◦ They are Precambrian rocks, older than 2020 million years.
◦ They are younger than 66 million years.
◦ They are between 160 and 162 million years.
◦ There are no age constraints from this data; sedimentary rocks cannot be dated by geochronology.
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Marked as best answer by nevelica on Feb 28, 2020

bhavsar

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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nevelica

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Reply 2 on: Feb 28, 2020
YES! Correct, THANKS for helping me on my review

isabelt_18

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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