The first layer of rock that this paper will examine is known as the Vishnu Basement Rocks and is Precambrian. They are recrystallized as a result of heat and pressure, and igneous. This means they were exposed to fire. (Dehler, et al, 1999) These stones are found along the Granite Gorge. They were formed by colliding as a result of volcanic action and the heat from that formed the igneous rock. Mountains were formed along the top of the rock. These are like basement rocks to the mountains on top of them. They are the oldest rocks in the Canyon. The rocks are located in what is called the “Inner Gorge” and there are at ...
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Bailey, A. M. (2012). Lithics on the edge: Flaked stone assemblages from grand canyon national
park. (Order No. 1531494, Northern Arizona University). ProQuest Dissertations and Theses, , 531. Retrieved from http://login.ezproxy1.lib.asu.edu/login?url=http://search.proquest.com/docview/1272126641?accountid=4485. (1272126641).
Ilg, Bradley R., Karlstrom, Karl E., Hawkins, David P., and Williams, Michael L., 1996,
Tectonic evolution of Paleoproterozoic rocks in the Grand Canyon: Insights into middle-crustal process: Geological Society of America Bulletin,.
Karlstrom, K.E., Ilg, B.R., Williams, M.L, Hawkins, D.P., Bowring, S.A., and Seaman, S.J.,
2003, Paleoproterozoic rocks of the Granite Gorges, in Grand Canyon Geology, second edition, Beus, Stanley. S., and Morales, Michael, eds., Oxford University Press, p. 9 – 38.
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