Vertical crustal movements in the conterminous United States over the last 10 million years

Abstract

ments from leveling data and their relation to geologic structure in the eastern United States: Reviews of-Geophysics and Space Physics, v. 14, no. 1, p. 13-35. Bulanzhe (Boulanger), YU. D., and Magnitskiy, V. A., 1974, Contemporary movements of the earth's crust--State of the problem: Physics of -the solid earth, Academy of Sciences, USSR, English ed« and translated and published by American Geophysical Union, no. 10, p. 618-621. Crittenden, M. D. Jr., 1963, New data on the isostatic deformation of Lake Bonneville: U.S. Geological Survey Professional Paper 454-E, p. E1-E31.

Remedial action plan and site conceptual design for stabilization of the inactive uranium mill tailings sites at Rifle, Colorado. Appendix D, Final report

“…Injection of laccoliths and other intrusions occurred after Laramide time, producing domes and other minor modifications of some of the older structures. The stable intracontinental subplate of the Colorado Plateau interior has experienced about two millimeters per year of uplift since the late Tertiary (Gable and Hatton, 1980). En echelon folding along the eastern and northern regions of the Colorado Plateau indicates a northeastward direction of yielding relative to the surrounding areas.…”

“…The Colorado Plateau is a major continental block which has been uplifted since late Tertiary time at a low rate of between two to three millimeters per year (Gable and Hatton, 1980). The plateau block has experienced little internal distortion in contrast with the more tectonically active regions of the Rio Grande Rift, the Arizona Basin and Range province, and the Intermountain Seismic Zone.…”

“…Recurrence intervals of neotectonic fault displacement along the major active systems along the Arizona-Utah border are estimated on the order of hundreds to thousands of years (Gable and Hatton, 1980).…”

Geodetic Monitoring of Tectonic Deformation: Toward a Strategy

“…Compilations of vertical data on a national scale (Brown and Oliver, 1976;Gable and Hatton, 1980) indicate that major crustal movements are taking place far from the recognized boundaries of the North American plate-movements that are seemingly unrelated to plate-tectonic processes, at least insofar L-we understand them at present. Other movements can be attributed to plate tectonics, but the details are not understood.…”

“…Are there surficial manifestations of this deep faulting that can be measured geodetically, perhaps as strain accumulation or plastic deformation spread over a band several hundreds of kilometers wide? (c) Are the Appalachian and Adirondack Mountains really rising and the intermontane valley subsiding as indicated by recent compilations of vertical control data (Gable and Hatton, 1980)? These observations need to be validated because they do not accord with geological evidence, although they do accord with the expected effect of atmospheric refraction when repeat leveling surveys are made over shorter sight lengths than was common in earlier times.…”