What role did microplates play in the formation of Pangaea? What will be an ideal response?
Numerous microplates from the Paleozoic became part of Pangaea and they explain some of the
anomalous geologic and paleontologic situations.
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Which of the following is NOT a greenhouse gas?
A. nitrogen (N2) B. methane (CH4) C. nitrogen oxide (N2O) D. water (H2O) E. carbon dioxide (CO2)
Chinook winds are cause by which of the following?
A) Winter storms arriving from northern Canada B) Cool, dry air that flows from the Dakotas C) Warm, dry air descending off the eastern slopes of the Rockies D) When warm, moist air flows above a cooler, dryer layer.
Drowned glacial valleys are known as
A) kettle holes. B) tarns. C) fjords. D) paternoster lakes.
How would we use isotopic ages to infer the ages of the upper and lower unit in this diagram?
A. An age on the dike would not help us because it is an igneous rock. B. The upper unit would be older than an age determined on pebbles of the dike in that unit. C. The dike is younger than the lower unit but older than the upper unit. D. The lower unit would be younger than an age on the crosscutting dike.