A shaky start?"Long Ride West: Many western sediments carne from Appalachians" (SN: 8/30/03, p. 131) suggests that the most likely transportation system of the sandstone across the continent would have been a river system. Could it have been due to tectonic movement Noun 1. tectonic movement - movement resulting from or causing deformation of the earth's crust crustal movement geology - a science that deals with the history of the earth as recorded in rocks instead? EDWARD B. FAN, UPPER MARLBORO Upper Marlboro may refer to:
Both Utah and the Appalachians are on the North American plate The North American Plate is a tectonic plate covering most of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. , so there's no tectonic boundary tectonic boundary In the theory of plate tectonics, a boundary between two or more plates. The plates can be moving toward each other (at convergent plate boundaries), away from each other (at divergent plate boundaries), or past each other (at transform between them. Sediments from the East could have been deposited and then remobilized at innumerable locations on their way to Utah. |
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