The Grand Tetons are one of the youngest mountain ranges in the lower 48 and rise dramatically above the valley floor at Jackson, Wy. The Grand Tetons:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aFormed as a result of continental hotspot volcanismbFormed due to fold-thrust fault deformationcFormed in the last 24 million years due to normal faulting on the Teton fault that exposes Proterozoic basement rocksdAre the easternmost expression of the Lewis thrust fault systemeB and D

The Teton Fault in the Grand Teton National Park is best described as:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aA large reverse fault, resulting in the Teton Range thrust over Jackson Hole valley.bA major tectonic plate boundary in Wyoming that separates two continental lithosphere plates.cA large normal fault that results in the uplift of the Teton Range in the footwall block.dA topographic feature formed by a river flowing through Jenny Lake.eA large strike-slip fault (like the San Andreas) where the mountains move laterally.

Select all correct answers: The metamorphic basement in Glacier, Grand Canyon and Grand Teton National Parks is:Multiple answers:Multiple answers are accepted for this questionSelected answers will be automatically saved. For keyboard navigation...SHOW MOREaPrecambrian in age and composed primarily of gneissbHas been exposed at the Earth's surface primarily throug erosion cPart of the North American CratondNone of the above

The Lewis thrust:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aFormed during the Cretaceous due to compressive forces related to subduction at the Western North American plate marginbThrust Precambrian rocks over Mesozoic sedimentscFormed during the Sevier orogenydAll of the aboveeNone of the above

The bedrock in the Teton Range consists of 2.68 billion-year-old rock of what type:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aSlate, a low-grade metamorphic slate.bGneiss, a high-grade metamorphic rock.cGranite that solidified from a high-silica magma.dVolcanic lava flows that solidified during early formation of the Earth.eNone of the above

In Glacier NP, the Precambrian rocks are in the hanging wall but in Teton NP they are in the footwall… How can that be?Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.aThe Precambrian rocks were deposited younger rocksbThe younger rocks were deposited on the Precambrian rocks during the PaleozoiccThe younger rocks were thrust on top of the older Precambrian rocks in Teton but not in GlacierdIn Glacier NP the Precambrian rocks were thrust eastward on Cretaceous and are in the hanging wall of the Lewis thrust in Sevier orogeny. At Teton NP, the Precambrian rocks are in the footwall of a major normal fault in the Cenozoic