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aztec sandstone brittle

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Stress conditions for the propagation of discrete ...

have been observed in the Aztec sandstone from Valley of Fire, Nevada [Hill, 1989; Sternlof et al., 2005] and in the Navajo sandstone of the Kaibab Monocline, Utah [Mollema and Antonellini, 1996]. These tabular zones of compaction typically have thickness on the order of .

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sandstone | Pyroclastic Pixels

The Aztec Sandstone, the dominant rock unit exposed in the park, is the equivalent of the Navajo Sandstone that makes up the cliffs of Zion National Park. Geologists just assign it a different name when it appears in Nevada and the Great Basin.

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Amazon: Online Shopping for Electronics, Apparel ...

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry ...

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Colorful Geology at Valley of Fire State Park ...

Colorful Geology at Valley of Fire State Park Compaction bands in multi-colored Aztec Sandstone, just one of many geologic wonders in Valley of Fire State Park, Nevada One of the great things about living in Southern Utah is the abundance of different climates within a small geographic area.

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Geolex — Aztec publications

Aztec Sandstone. Trackways attributed to Coelurosaurs (small dinosaurs) identified in Aztec Sandstone in Mescal Range, northeastern San Bernardino County, California. Age range (for both Aztec and Navajo Sandstones) is suggested to be between early Pliensbachian and late .

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Permeability upscaling of fault zones in the Aztec ...

Apr 18, 2007 · The effect of open and filled slip surfaces on the upscaled permeability of two fault zones with 6 and 14 m strike-slip in an eolian Aztec Sandstone, Nevada, USA is evaluated. Each fault zone is composed of several fault components: a fault core, bounded by filled through-going slip surfaces referred to as slip bands, and a surrounding damage ...

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Paleo-fluid flow and deformation in the Aztec Sandstone at ...

Request PDF on ResearchGate | Paleo-fluid flow and deformation in the Aztec Sandstone at the Valley of Fire, Nevada—Evidence for the coupling of hydrogeologic, diagenetic, and tectonic processes ...

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Red Rock Canyon

Sandstone becomes extremely brittle when wet and climbing wet sandstone poses an increased risk to climbers from breakoffs and injury resulting from rockfalls. It is practice to wait 24-48 hours after rain before climbing, so that the sandstone can thoroughly dry. If rain is forecasted for your trip, consider the limestone sport crags that are ...

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Thesaurus Terms | GeoScienceWorld

Abstract The interaction among brittle deformation, fluid flow, and diagenesis is displayed at Valley of Fire, southern Nevada, where diagenetic iron oxide and hydroxide stains provided a visible record of paleofluid flow in Jurassic Aztec Sandstone.

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Effect of grain size distribution on the development of ...

formation, (b) Boise sandstone that failed by distributed cataclastic flow (Note the different scale), and (c) Navajo sandstone from Buckskin Gulch and Aztec sandstone from Valley of Fire. Navajo sandstone data are based on Figure S1 of Schultz et al. [2010]. We only show data for layer 4, but those for layer 2 .

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Rock density and porosity - PetroWiki

Fig. 3 – Shale and sandstone porosity with depth. Porosity decreases until high pore pressures (= geopressure) reduce the effective pressure and cause an increase in porosity (from Stuart). Measurement techniques Laboratory. Numerous methods can be used in the laboratory to determine porosity and density. The most common are by saturation ...

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Geology Highlights | Red Rock Canyon Las Vegas

Aztec Sandstone. The great sandstone cliffs at Red Rock, thousands of feet high, are made up of the Aztec Sandstone. This formation, about 180 - 190 million years old, is comprised of lithified sand dunes that formed in a vast desert that covered a large part of .

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Paleo-fluid flow and deformation in the Aztec Sandstone at ...

Paleo-fluid flow and deformation in the Aztec Sandstone at the Valley of Fire, Nevada—Evidence for the coupling of hydrogeologic, diagenetic, and tectonic processes Peter Eichhubl. Peter Eichhubl. 1. Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115, .

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A Microstructural Study of Small-Displacement Faults in ...

Previous studies indicate that brittle shear localization microstructures develop during the initial increments of shear displacement. We studied gouge samples from faults in Aztec quartz sandstone (Valley of Fire State park, Nevada) with shear displacements in the order of 10-1500mm.

  • Authors: Kevin Hagg · Mehdi M Yazdanpanah · Steven Andrew Harfenist · Martin Otto · J Hadi.About: Observational error · Microstructure · Fractal dimension · Particle size · Cumulant · No.Get Price

Multiscale modeling and analysis of compaction bands in ...

[25, 49, 62], and the Jurassic Aztec Sandstone in Nevada, USA [4, 21, 33, 63]. The presence of compaction band has been found to cause a dramatic reduction in both porosity and permeability within compaction bands as compared to the host rock [25] and hence can significantly alter the flow in rocks, leading to great challenges for practical ...

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joints - maps.unomaha.edu

Review paper: Fossen et. al., 2007, Deformation bands in sandstone: a review; Journal of Geological Society, London; 164, 1-15. This is a close up view the Jurassic Aztec sandstone in Valley of Fire State Park in Nevada. Three planar discontinuities can be seen in the sandstone, and are compaction bands.

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Analysis of deformation bands in the Aztec Sandstone ...

This research concerns two types of deformation structures, deformation bands and low-angle slip surfaces, that occur in the Aztec Sandstone in the Valley of Fire State Park, Nevada. Deformation bands were analyzed by mapping and describing over 500 of the .

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Aztec Sandstone - Wikipedia

The Aztec Sandstone is a Lower Jurassic geological formation of primarily eolian sand from which fossil pterosaur tracks have been recovered. The formation is exposed in the Mojave Desert of Arizona, California and Nevada .

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Publications — Rock Deformation Laboratory

Hadizadeh J. and Law R. D. 'Water weakening of sandstone and quartzite deformed at various stress and strain rates' International Journal of Rock Mechanics & Mining Sciences, 28, 431-440, 1991. Hadizadeh J and Tullis J. 'The cataclastic flow and semi-brittle deformation of Anorthosite' Journal of Structural Geology, 14, 57-63, 1992.

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A Microstructural Study of Small-Displacement Faults in ...

Previous studies indicate that brittle shear localization microstructures develop during the initial increments of shear displacement. We studied gouge samples from faults in Aztec quartz sandstone (Valley of Fire State park, Nevada) with shear displacements in the order of 10-1500mm.

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Navajo Sandstone - sed.utah.edu

Figure 3: This paleogeographic reconstruction of the western US during the Early Jurassic (Kocurek and Dott,1983 p. 106) shows the Navajo Sandstone and correlative eolian units, the Nugget and the Aztec, covering parts of Utah, Wyoming, Colorado, Arizona, Nevada, New Mexico and California. To the south and west lie mountains of the nascent ...

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