Map Contacts and Formations Activity 10.1 Name: Course/Section: Date: is an aeri
ID: 294630 • Letter: M
Question
Map Contacts and Formations Activity 10.1 Name: Course/Section: Date: is an aerial photograph of part of the Grand Canyon centered on latitude 36 334'N, longitude 112725 W. The is area is pesented on a map by George Bilingsley published in 200o by the USCS (Ihtp://pubs sg-gox/map/ pdf and http://pubs.ugs.gov/imap?2688 í 26 8 pa mphlet pdf. Part of several contacts are shown as dashed nes at the bottom and top of the photograph. The mapped rock units are explained in the table below the photograph. Pe Cm Pe Pe North MIPu EXPLANATION Pe Esplanade Sandstone (Lower Permian) MPu Watahomigi Formations (L Pennsylvanian and U Mississippian) Mr] Redwall Limestone (Upper and Lower Mississippian) Dtb Temple Butte Formation (Upper and Lower Devonian) Em Muav Limestone (Middle Cambrian) Figure A10.1.1Explanation / Answer
Watahomigi formation is relatively undeformed because it is a case of river canyon where the water pressure of a river cuts deep into a river bed & flowing river carries ediments from the river bed creating a deep, narrow channel.
The phenomena is different with that of rivers that are wide having flat flood plains which are having large meandering channels & change their course of flow whereas canyon rivers do not meander and change their course so Watahomigi formation is undeformed.