Go to the following Geotours Folder in Google Earth: 2. Exploring Geology Using

Question

Go to the following Geotours Folder in Google Earth: 2. Exploring Geology Using Google Earth rightarrow Geotour Worksheets rightarrow L Geotogic Structures. In the Problem 2 folder, check and double click placemark Problem 2 to fly to Arches National Park in Utah. Also, turn on the 'Arches NP Geologic Map-North* map overlay and make it semi-transparent Placemark Problem 2 points to a road (dashed red line on the geologic map) that approximates the axis of a salt-filled antidine that has collapsed to form Salt Valley. Along the flanks of this anticlinal valley, some of the rock units exhibit a prominent linear pattern that reflects systematic joint sets that have developed. What happens to the joint sets beneath the younger rock units (Jmt & Jms) at placemark Problem 2b? Choose one: they do not exist beneath placemark Problem 2b anywhere in the subsurface they continue on beneath placemark Problem 2b in the white unit (Jctm) because the younger Jmt/Jms units just cover them

Explanation / Answer

b) they continue on beneath placemark 2b in the white units because the younger units just cover them.This occurs due to the formula superposition.This superposition is applied here as due to gravity the older once move downwards and the younger ones cover them.

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