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western Grand Canyon

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... The Laramide physiographic genesis of the adjacent Hualapai and Shivwits Plateaus provides compelling evidence for the probable emergence of an incised, middle Miocene, western precursor to the modern Grand Canyon, without necessitating the contemporaneous, voluminous deposition of middle and late...
FIGURES | View All (8)
Journal Article
Published: 01 December 2018
Journal of Paleontology (2018) 92 (S77): 1-33.
...John-Paul M. Hodnett; David K. Elliott Abstract Two chondrichthyan assemblages of Late Mississippian/Early Pennsylvanian age are now recognized from the western Grand Canyon of northern Arizona. The latest Serpukhovian Surprise Canyon Formation has yielded thirty-one taxa from teeth and dermal...
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Journal Article
Journal: Geosphere
Published: 01 February 2008
Geosphere (2008) 4 (1): 183-206.
...–150 ka, and 150–75 ka. To extend the usefulness of these dates for understanding volcanic stratigraphy and lava dams in western Grand Canyon, we analyzed light detection and ranging (lidar) data to establish the elevations of the tops and bottoms of basalt-flow remnants along the river corridor. When...
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Journal Article
Journal: Geosphere
Published: 01 August 2015
Geosphere (2015) 11 (4): 958-976.
...Andrew Darling; Kelin Whipple Abstract Hypotheses for the age of the western Grand Canyon (WGC) range from younger than 6 Ma to older than 70 Ma. We study the relationships among topography, geology, and available erosion rates in space and time to place constraints on plausible canyon incision...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2008
GSA Bulletin (2008) 120 (3-4): 414-430.
... of the Frog Fault and Lone Mountain Monocline in the western Grand Canyon demonstrate a systematic relationship between elements of the normal fault system and fold geometry. The Lone Mountain Monocline, which parallels the Frog Fault, is made up of two half-monoclinal flexures: a hanging-wall fold in which...
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Series: GSA Memoirs
Published: 01 January 1994
DOI: 10.1130/MEM183
Series: GSA Memoirs
Published: 01 January 1994
DOI: 10.1130/MEM183-p1
... The late Cenozoic basalts in the western Grand Canyon constitute one of the most unique and spectacular displays of volcanic activity in North America. Numerous flows were extruded on the Uinkaret Plateau and cascaded over the outer rim of the Grand Canyon into Toroweap Valley and Whitmore Wash...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1979
GSA Bulletin (1979) 90 (2): 221-222.
Journal Article
Journal: GSA Bulletin
Published: 01 February 1979
GSA Bulletin (1979) 90 (2): 222-224.
Journal Article
Journal: GSA Bulletin
Published: 01 November 1977
GSA Bulletin (1977) 88 (11): 1619-1622.
...PETER W. HUNTOON Abstract The Toroweap and Hurricane faults and a subsidiary fault in the western Grand Canyon exhibit evidence of Holocene movement. This evidence includes scarps in alluvium and sediments ponded against a fault on the downthrown block. These displacements are the latest in a well...
Journal Article
Journal: GSA Bulletin
Published: 01 November 1974
GSA Bulletin (1974) 85 (11): 1691-1696.
...W. P. LEEMAN Abstract Twenty samples of Pliocene-Holocene basanite, hawaiite, and quartz-bearing basaltic andesite from the western Grand Canyon district have Sr 87 /Sr 86 ratios that range from 0.7028 to 0.7069. Sixteen of these are lava flows that have Sr 87 /Sr 86 (0.7028 to 0.7041), K/Rb (500...
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Slope map of the <b>western</b> <b>Grand</b> <b>Canyon</b> (WGC) and <b>Grand</b> Wash Cliffs (GWC) are...
in > Geosphere
Published: 01 August 2015
Figure 11. Slope map of the western Grand Canyon (WGC) and Grand Wash Cliffs (GWC) areas (30 m resolution, location shown in Figs. 1 and 10 ). Although incised through the same rocks and in the same climate, the topographic expression of the GWCs and associated tributary canyons and side
Journal Article
Journal: GSA Bulletin
Published: 01 November 2007
GSA Bulletin (2007) 119 (11-12): 1283-1312.
... of 150–175 m/Ma over approximately the last 500 ka; western Grand Canyon block (west of Hurricane fault) has bedrock incision rates of 50–75 m/Ma over approximately the last 720 ka. Fault displacement rates are 97–106 m/Ma on the Toroweap fault (last 500–600 ka) and 70–100 m/Ma on the Hurricane fault...
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<b>Western</b> <b>Grand</b> <b>Canyon</b> study area, defined as downstream of Hurricane fault a...
in > Geosphere
Published: 01 August 2015
Figure 1. Western Grand Canyon study area, defined as downstream of Hurricane fault and upstream of Grand Wash trough. Elevation colored over hillshade; analyzed tributary rivers are shown in blue. Major faults, major tributary knickpoints, early Tertiary paleochannels, and topographic
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SUMMARY OF TRIBUTARY PROJECTIONS, <b>WESTERN</b> <b>GRAND</b> <b>CANYON</b>
in > Geosphere
Published: 01 August 2015
TABLE 2. SUMMARY OF TRIBUTARY PROJECTIONS, WESTERN GRAND CANYON
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Comparative interfluvial topographic profiles in the <b>western</b> <b>Grand</b> <b>Canyon</b> (...
in > Geosphere
Published: 01 August 2015
Figure 12. Comparative interfluvial topographic profiles in the western Grand Canyon (WGC) and along the Grand Wash Cliffs (GWC). Topographic section line locations are shown in Figures 1 and 11 . Profiles in the WGC are shown in red and orange and those along the GWC are in blue. Canyon
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SUMMARY OF TOPOGRAPHIC ANALYSIS OF <b>WESTERN</b> <b>GRAND</b> <b>CANYON</b> TRIBUTARY STREAMS
in > Geosphere
Published: 01 August 2015
TABLE 1. SUMMARY OF TOPOGRAPHIC ANALYSIS OF WESTERN GRAND CANYON TRIBUTARY STREAMS
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Shaded relief map of <b>western</b> <b>Grand</b> <b>Canyon</b>–Lower Granite Gorge region showin...
Published: 01 July 2011
Figure 2. Shaded relief map of western Grand Canyon–Lower Granite Gorge region showing locations of sections and map in Figures 3 , 8 , and 12 , the location of paleocanyons (generalized from Young, 2008 ), sample locations of the three (U-Th)/He apatite ages shown in Figure 5 and discussed
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Cross section through the <b>western</b> <b>Grand</b> <b>Canyon</b> region showing geometric rel...
Published: 01 July 2011
Figure 8. Cross section through the western Grand Canyon region showing geometric relationships between various geomorphic and geologic features discussed in text (based on Young, 1982 ). Xg—Proterozoic crystalline basement; D—Cambrian and Devonian strata; MP—Mississippian to Permian strata; Pk
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Figure 1. Shaded-relief location map of <b>western</b> <b>Grand</b> <b>Canyon</b>. The study are...
Published: 01 March 2008
Figure 1. Shaded-relief location map of western Grand Canyon. The study area is outlined in the hachured box. Quaternary faults from U.S. Geological Survey (USGS) database. Quaternary basalts from Brown et al. (2000) —UT; Turner et al. (1991) —NV; and Hirschberg and Pitts (2000) —AZ. The bold