How did the sedimentary environments of the Kaskaskia sequence differ from those of the
Absaroka sequence in North America? What will be an ideal response?
The Kaskaskia is characterized by a basal clean quartz sand which spread over the craton,
followed by extensive carbonate deposition, some evaporites, and black shales. Clastic wedges
poured west from rising highlands on the eastern cratonic margin. The Absaroka is notable for
cyclothems, and the extensive coal measures. Absaroka hallmarks include intracratonic basin
clastics (Ancestral Rockies). Retreat of the Absaroka Sea left extensive sheets of terrestrial red
beds across the continent.
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Organisms that live in the marine ecosystem above the seafloor are called ____________________
Fill in the blank(s) with correct word
Ozone is concentrated in the ________
troposphere mesosphere stratosphere ionosphere
Which orogeny is largely responsible for creating the modern Rocky Mountains?
A) Nevadan Orogeny B) Taconic Orogeny C) Laramide Orogeny D) Alleghanian Orogeny
Which of the following is the most labor intensive land use?
A. trapping B. ranching C. orchards D. swidden agriculture