An imbricate midcrustal suture zone: The Mojave-Yavapai Province boundary in Grand Canyon, Arizona
نویسندگان
چکیده
منابع مشابه
The pre-Flood/Flood Boundary: As Defined in Grand Canyon, Arizona and eastern Mojave Desert, California
The singular events which occurred at the initiation of the Flood should have produced a geologic signature with at least five characteristics: (a) a mechanical-erosional discontinuity (ED) identified by regional structural analysis—probably the most significant unconformity in any given area; (b) a time or age discontinuity (AD) identified by coarse sediments above the erosional unconformity c...
متن کاملWintertime Boundary Layer Structure in the Grand Canyon
Wintertime temperature profiles in the Grand Canyon exhibit a neutral to isothermal stratification during both daytime and nighttime, with only rare instances of actual temperature inversions. The canyon warms during daytime and cools during nighttime more or less uniformly through the canyon’s entire depth. This weak stability and temperature structure evolution differ from other Rocky Mountai...
متن کاملK-Ar ages of Pleistocene lava dams in the Grand Canyon in Arizona.
At least 13 times during the Pleistocene Epoch lava flowed into the inner gorge of the Grand Canyon and formed lava dams, as high as 600 m, that temporarily blocked the flow of the Colorado River. K-Ar ages on these lava dams indicate that the seven youngest formed within a short period of time between about 0.6 and 0.4 mega-annum (Ma). The physiography of the lava dam remnants within the canyo...
متن کاملFactors Affecting Condition of Flannelmouth Suckers in the Colorado River, Grand Canyon, Arizona
—The impoundment of the Colorado River by Glen Canyon Dam, Arizona, in 1963 created a highly regulated environment in the Grand Canyon that altered the native fish populations, including the flannelmouth sucker Catostomus latipinnis. Flannelmouth suckers were sampled from 1991 to 2001 to determine seasonal, annual, and spatial trends in fish condition (i.e., relative weight [Wr]). Mean Wr peake...
متن کاملAlgal Deposits of Unkar Proterozoic Age in the Grand Canyon, Arizona.
* Evidence for the second partial reaction going on from left to right has been obtained recently by Millikan and Cameron. As the intensity of the cosmic radiation is of the same order of magnitude as the total intensity of star light, the building up process of matter from simple nuclei seems to go on at the same rate as the burning up of matter in the stars. 1 See, for instance, Jeans, Nature...
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ژورنال
عنوان ژورنال: Geological Society of America Bulletin
سال: 2015
ISSN: 0016-7606,1943-2674
DOI: 10.1130/b31232.1