Geology exam II
Terms
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What caused the laramide Orogeny that is responsible for uplifting the Colorado Plataeu?
a. Foundering of the subducted Kula plate into the deep asthenosphere 55Ma.
b. Hacnge to shallow subduction of the Kula Plate 60 Ma.
- B
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How are the rocks at Bryce Canyon (Claron Formation) different from those exposed at zion (Navojo Sandstone) andt the Grand Canyon (Redwall Limestone)?
a. The rocks of the Claron Formation were deposited in a large lake.
b. The clar - A
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What is the origin of the evaporate deposits of the paradox Formation (Canyonlands)?
a. Evaporation of ocean water trapped in basins during regression of the Permian sea.
b. Evaporation of fresh water lakes during a marine transgres - A
- T OR F. The great unconformity of the GRAND Canyon is a non-conformity and, in some places, and angular unconformity.
- A. TRUE
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wHAT CAUSES THE STEEP cliff faces of the virgin river valley at zion national park?
a. Mass wasting of the thickly bedded navajo sandstone.
b. Mass wasting of the thinly bedded Kayenta formation.
c. Dissolution by groundw - A
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wHAT Ithe relationship between the pierre shale exposed at Badlandsand the Mancos Shale exposed at Mesa Verde?
a. They were both deposited during transgressionof the cretaceous Sea.
b. They were the same formation.
c. The - A.
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wHICH OF THE FOLLOWING IS NOT CAUSED BY DIFFERENTIAL WEATHERING?
A.Hoodoos
b. Pinnacles
c. Mesas
d. Columnar jointing - D.
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The rocks exposed at the Grand Canyon much of the continent's history spanning fom what to what.
a. Middle Permian (~250 Ma) to the present.
b. Early Cambrian (~540 Ma) to the middle Permian (~250)
c. Late Precambrian (~1 - C
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Complete the sentence: The process of Frost wedging......
a. Is caused by the expansion of water when it freezes.
b. Is the cause of much of the mass wasting at Zion and Arches NP.
C. Is a type of Physical weathering proc - d.
- Who was the first non-native American to explore the Grand Canyon?
- J. WESLEY POWEL, 1869
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kARST sYSTEMS LIKE THOSE AT MAMMOTH CAVE, ARE PRODUCTS OF WHAT PROCESS?
A. sTREAM CHANNEL DOWN-CUTTING
B. Physical weathering of weal rocks.
c. Chemical weathering (dissolution) of soluble rocks.
d. Glacial erosion - c.