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Author Question: A geologist observes abundant fossils of a distinctive trilobite species in a shale, but this ... (Read 171 times)

HudsonKB16

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on: Feb 28, 2020
A geologist observes abundant fossils of a distinctive trilobite species in a shale, but this trilobite disappears as she walks through the shale. In younger rocks, just above the horizon where the fossil disappears another species of trilobite becomes the prominent fossil in similar shales. Which conclusion is most logical for this observation?
◦ The first trilobite species went extinct and its ecological niche was occupied by another species, which may have evolved from the first.
◦ A hurricane or other catastrophe killed all of the early species so the other species could move in.
◦ The second, trilobite group in the upper section went extinct where the change in fossils is seen.
◦ The organisms whose remains form the first fossil moved from the area for unknown reasons.
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by HudsonKB16 on Feb 28, 2020

Koolkid240

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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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HudsonKB16

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Reply 2 on: Feb 28, 2020
Excellent

brbarasa

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Reply 3 on: Yesterday
Gracias!

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