The Burgess Shale was deposited during the Cambrian as the Sauk Sea transgressed onto the craton.
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Q11: There is no evidence in the geologic
Q12: A worm that burrows into sediments below
Q13: All of the organisms that live on
Q14: Invertebrates are defined as animals with shells.
Q15: Organisms that comprised reef complexes remained virtually
Q17: Pelagic fish are part of the benthos.
Q18: Ammonoids, graptolites, and conodonts are excellent guide
Q19: Invertebrates are a group of organisms that
Q20: Phytoplankton are primary producers.
Q21: Planktonic foraminifera and jellyfish are examples of
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