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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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drelog drelog
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8 years ago
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?
A) The organisms whose remains form the first fossil moved from the area for unknown reasons.
B) The first trilobite species went extinct and its ecological niche was occupied by another species, which may have evolved from the first.
C) The second, trilobite group in the upper section went extinct where the change in fossils is seen.
D) A hurricane or other catastrophe killed all of the early species so the other species could move in.
Textbook 
Earth Science

Earth Science


Edition: 14th
Authors:
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PulsaPulsa
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8 years ago
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drelog Author
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8 years ago
This works! Smiling Face with Open Mouth
ןnɟʎoɾ sʎɐʍן∀ Slight Smile
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