Describe the four stages of the breakup of Pangaea. What will be an ideal response?
The first event was rifting between Laurasia and Gondwana during the Late Triassic, which initiated
the Atlantic Ocean. Second was rifting and movement of the various Gondwana continents during the
Late Triassic and Jurassic. Third, South America and Africa began to separate during the Late Jurassic.
Australia and Antarctica separated and Greenland began to separate from Europe. Finally, during the
Cenozoic, Australia continued moving northward, Greenland separated from Europe, and North
America formed a separate landmass.
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The single largest sand mining operation is in Alaska Indicate whether the statement is true or false
The two most common elements in Earth's crust are ____________________ and ____________________
Fill in the blank(s) with correct word
On land, a traveler would notice a decrease in primary productivity by traveling from the tropics to higher latitudes
a. True b. False Indicate whether the statement is true or false
Indicators of past global air or water temperatures include all of the following except
A. calcium carbonate content of sediments. B. oxygen-isotope composition of marine microorganisms' shells. C. volcanic ash deposits in glacial ice. D. isotopic composition of glacial ice.