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Author Question: Rayed craters like Tyco and Copernicus are known to be younger than the lunar maria because ________. (Read 119 times)

WWatsford

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on: Feb 28, 2020

Question 1

We know the age of the lunar highlands from ________.
◦ dating of lunar maria basalts collected by Apollo astronauts, and then calculated back in time by relative chronology
◦ dating of Earth rocks, and correlating to lunar events
◦ dating of lunar rocks collected by Apollo missions
◦ age estimates from cratering rates

Question 2

Rayed craters like Tyco and Copernicus are known to be younger than the lunar maria because ________.
◦ they are formed on lunar highlands that are known to be younger than the maria
◦ their ejecta, seen as rays, lies across the surface of the maria
◦ they have been dated directly by radiometric dating of samples
◦ they contain volcanos in their centers which indicate the moon still had magma available when they formed
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Marked as best answer by WWatsford on Feb 28, 2020

Athena23

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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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WWatsford

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Reply 2 on: Feb 28, 2020
Great answer, keep it coming :)

recede

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Reply 3 on: Yesterday
Excellent

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