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Cottonwood Valley

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Published: 01 January 1999
DOI: 10.1130/0-8137-2333-7.17
Published: 01 January 1990
DOI: 10.1130/MEM176-p413
... The structure of the northern Cottonwood Mountains, located in the Death Valley region of southeastern California, is dominated by a faulted, east-facing, monoclinal flexure developed in Paleozoic strata of the Cordilleran miogeocline. We interpret this flexure as a rollover or fault-bend fold...
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Detrital zircon U-Pb results from Lake Mohave and Cottonwood Valley. Sample locations are shown in Figure 5B and listed in Table 3. (A–I) Relative probability plots. (A) Bullhead alluvium sample 30 (06322–37). (B) Bullhead alluvium sample 29 (06322–6). (C) Bullhead alluvium sample 26 (32103–1). (D) Bullhead alluvium sample 27 (320013–13). (E) Bouse Formation sample 28 (32003–7). (F) Bouse Formation sample 25 (32506–1). (G) Sub-Bouse fluvial sediments sample 23 (32706–3). (H) Late Miocene Lost Cabin Beds sample 24 (32306–175). (I) Cumulative probability plots of above samples; also includes Holocene Colorado River (HCR) reference. Samples 26, 28, 29, and 30 are included in PCR reference.
Published: 01 December 2015
Figure 10. Detrital zircon U-Pb results from Lake Mohave and Cottonwood Valley. Sample locations are shown in Figure 5B and listed in Table 3 . (A–I) Relative probability plots. (A) Bullhead alluvium sample 30 (06322–37). (B) Bullhead alluvium sample 29 (06322–6). (C) Bullhead alluvium sample
Journal Article
Journal: Geosphere
Published: 01 December 2014
Geosphere (2014) 10 (6): 1139–1160.
...Philip A. Pearthree; P. Kyle House Abstract Geologic investigations of late Miocene–early Pliocene deposits in Mohave and Cottonwood valleys provide important insights into the early evolution of the lower Colorado River system. In the latest Miocene these valleys were separate depocenters...
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First thumbnail for: Paleogeomorphology and evolution of the early Colo...
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... Late Miocene and early Pliocene sediments exposed along the lower Colorado River near Laughlin, Nevada, contain evidence that establishment of this reach of the river after 5.6 Ma involved flooding from lake spillover through a bedrock divide between Cottonwood Valley to the north and Mohave...
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Map showing regional setting of Mohave and Cottonwood Valleys in the lower Colorado River Valley. Inferred areas of paleolakes and modern water bodies are shown with shades of blue. Heavy black lines show locations of inferred paleodams relevant to this paper.
Published: 01 December 2014
Figure 1. Map showing regional setting of Mohave and Cottonwood Valleys in the lower Colorado River Valley. Inferred areas of paleolakes and modern water bodies are shown with shades of blue. Heavy black lines show locations of inferred paleodams relevant to this paper.
Journal Article
Journal: Geology
Published: 22 February 2021
Geology (2021) 49 (6): 635–640.
...) with the evolving Gulf of California. The Colorado River arrived at Cottonwood Valley (Nevada and Arizona) after 5.24 Ma (during or after the Thvera subchron). The river reached the proto–Gulf of California once between 4.80 and 4.63 Ma (during the C3n.2r subchron), not at 5.3 Ma and 5.0 Ma as previously proposed...
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First thumbnail for: Redefining the age of the lower Colorado River, so...
Second thumbnail for: Redefining the age of the lower Colorado River, so...
Third thumbnail for: Redefining the age of the lower Colorado River, so...
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Bullhead gravel and sand from the Tyro Wash section in southern Cottonwood Valley. (A) The Tyro Wash section is dominated by thick tabular beds of cross-stratified rounded cobbles and boulders, and elaborately cross-bedded sand and finer gravel beds. The vertical section here is 45 m thick, and is part of a composite section that ranges from ∼200 to 420 m above sea level (asl) in Cottonwood Valley. (B) Moderate close-up of the western end of the section shows complexly interbedded sands and rounded gravel beds typical of the Bullhead alluvium. (C) Tan quartz-rich river sand beds (white arrows) interfingered with darker tributary fan gravel beds farther upsection and away from the valley axis.
Published: 01 December 2014
Figure 10. Bullhead gravel and sand from the Tyro Wash section in southern Cottonwood Valley. (A) The Tyro Wash section is dominated by thick tabular beds of cross-stratified rounded cobbles and boulders, and elaborately cross-bedded sand and finer gravel beds. The vertical section here is 45 m
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Map illustrating the paleogeography and drainage systems of Cottonwood and Mohave Valleys prior to the arrival of Colorado River water. Purple numbers are selected elevations above sea level in meters of basal Bouse outcrops; red numbers indicate the base of the Bouse in the subsurface inferred from well logs. Tan blobs illustrate the approximate extents of the inferred playas in central Cottonwood Valley and central and southern Mohave Valley. Arrows indicate slopes inferred for immediately pre-Bouse alluvial fans and axial drainages.
Published: 01 December 2014
Figure 3. Map illustrating the paleogeography and drainage systems of Cottonwood and Mohave Valleys prior to the arrival of Colorado River water. Purple numbers are selected elevations above sea level in meters of basal Bouse outcrops; red numbers indicate the base of the Bouse in the subsurface
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Published: 15 August 2022
Table 1. Total clast-count data for Blue Diamond landslide breccia with separate count data for proximal, medial, and distal Blue Diamond Ridge, Hill 4358′, Blue Diamond Hill, and Cottonwood Valley outcrops.
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Lateral and vertical extent of the Bullhead alluvium. Map of Mohave and Cottonwood Valleys showing extent of mapped Bullhead alluvium in pink; mapped Bouse deposits are in red. Dashed purple lines encompass the highest Bullhead outcrops in various parts of these valleys. Minimum and maximum elevations of the outcrops are noted with purple numbers.
Published: 01 December 2014
Figure 12. Lateral and vertical extent of the Bullhead alluvium. Map of Mohave and Cottonwood Valleys showing extent of mapped Bullhead alluvium in pink; mapped Bouse deposits are in red. Dashed purple lines encompass the highest Bullhead outcrops in various parts of these valleys. Minimum
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AandB, Geologic cross sections C-C′ and D-D′ across Cottonwood Valley showing four structural blocks bounded by the four major west- and WSW-dipping normal faults, the Mine Hollow, Valley, Western Valley, and King Creek faults. CandD, Restored cross sections C-C′ and D-D′ showing the restored Miocene–Cambrian unconformity and the original orientation of the Valley fault system.
Published: 01 December 2015
Figure 8. A and B , Geologic cross sections C-C′ and D-D′ across Cottonwood Valley showing four structural blocks bounded by the four major west- and WSW-dipping normal faults, the Mine Hollow, Valley, Western Valley, and King Creek faults. C and D , Restored cross sections C-C
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AandB, Geologic cross sections C-C′ and D-D′ across Cottonwood Valley showing four structural blocks bounded by the four major west- and WSW-dipping normal faults, the Mine Hollow, Valley, Western Valley, and King Creek faults. CandD, Restored cross sections C-C′ and D-D′ showing the restored Miocene–Cambrian unconformity and the original orientation of the Valley fault system.
Published: 01 December 2015
Figure 8. A and B , Geologic cross sections C-C′ and D-D′ across Cottonwood Valley showing four structural blocks bounded by the four major west- and WSW-dipping normal faults, the Mine Hollow, Valley, Western Valley, and King Creek faults. C and D , Restored cross sections C-C
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Schematic north-south transects illustrating the fluviolacustrine model of the development of the Lower Colorado River (undiff.—undifferentiated). (1) Pre-Bouse closed basins and paleodivides. Paleolake Cottonwood forms as Colorado River first enters from the north. (2) River-fed paleolake Cottonwood expands and spills into Mohave Valley and erodes the Pyramid paleodivide. (3) Paleolake Mohave, full of water, spills to the south over the Topock paleodivide into paleolake Havasu; a delta progrades in Cottonwood Valley; carbonate deposition occurs in paleolake Havasu. (4) Paleolake Mohave is mostly filled with sediment as Topock spillover is lowered; sediment-starved, carbonate-bearing water is supplied to downstream basins. (5) Paleolake Mohave is gone, Topock outlet is partially eroded, paleolake Havasu is partially filled with sediment, and paleolake Blythe is partially filled with carbonate-bearing water, but no siliclastic sediment. (6) Paleolake Havasu is gone, delta building occurs in the northern end of paleolake Blythe, and there is incipient spilling to Gulf of California. (7) The demise of paleolake Blythe occurs as sedimentation reaches outlet level; thick Bouse deposits fill the Parker-Blythe-Cibola basin. (8) There is continued lowering of Chocolate spillover, erosion of Bouse basins, and bedrock reaches upstream. (9) The base profile for Bullhead aggradation is created by the culmination of river incision into Bouse sediments and bedrock. (10–12) Representations of progressive Bullhead aggradation through the lower Colorado River Valley (for a more thorough discussion, see Howard et al., 2015).
Published: 01 December 2014
paleolake Cottonwood expands and spills into Mohave Valley and erodes the Pyramid paleodivide. (3) Paleolake Mohave, full of water, spills to the south over the Topock paleodivide into paleolake Havasu; a delta progrades in Cottonwood Valley; carbonate deposition occurs in paleolake Havasu. (4) Paleolake
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Projections of Bouse deposit localities from the east and west sides of the valleys onto a north-south plane. Bouse data points below the modern river or lake level are from wells logs. (A) Basal and/or perimeter points (blue diamonds) represent Bouse deposits directly over alluvial deposits or bedrock on the valley sides. Fine siliciclastic Bouse deposits are shown only in the subsurface to define the pre-Bouse topography. The Pyramid gravel (PyG) in northern Mohave Valley records the initial spillover of a relatively small lake in Cottonwood Valley. This was followed by lake level rise to a maximum of 555–560 m above sea level (asl) recorded at Silver Creek (SiC), then spilling over the Topock paleodivide. (B) Fine silt and clay deposits (pale green diamonds) are common and have been found as high as to 500 m asl. These deposits would have been suspended sediment and could have been widely distributed in the lake and draped over the lake bottom. Quartz-rich sand deposits (orange diamonds) generally are turbidite deposits in deep water, for example in the Park Moabi (PM) and Dead Mountain piedmont (DM) areas. The detrital zircon analysis of a quartz-rich sand bed near the base of a Bouse outcrop in Cottonwood Valley (DZ) showed similarity to Colorado River sand (Kimbrough et al., 2015). The highest sand deposits grade upward into local gravel deposits at Secret Pass Canyon (SPC) at 430–440 m asl. Dashed gray lines depict hypothetical delta tops graded to decreasing lake levels (dashed blue lines) due to spillover erosion. The valleys filled with Colorado River siliciclastic delta deposits as the lake level lowered (tan color); dashed gray dashed lines represent the advancing delta front with time. Dashed green lines depict river gradients graded to these lake levels, and would have been cut into older delta deposits in the north.
Published: 01 December 2014
deposits or bedrock on the valley sides. Fine siliciclastic Bouse deposits are shown only in the subsurface to define the pre-Bouse topography. The Pyramid gravel (PyG) in northern Mohave Valley records the initial spillover of a relatively small lake in Cottonwood Valley. This was followed by lake level
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Examples of Bullhead alluvium. (A) Well-rounded, lithologically diverse river gravel lag on the Black Mountain piedmont at 400 m above sea level (asl), northern Mohave Valley. Clasts in the foreground range from pebbles to small cobbles. (B) Coarse rounded gravel on an approximately 2.5-m-high pedestal in Lake Mohave (195 m asl) in Cottonwood Valley. (C) Moderately indurated, cross-stratified, quartz-rich sand and rounded gravel at river level (150 m asl) near Fort Mohave in northern Mohave Valley (note woman and dogs for scale). Photo locations are shown on Figure 12 where corresponding elevations (A: 400 m; B: 195 m; and C: 150 m) are listed.
Published: 01 December 2014
2.5-m-high pedestal in Lake Mohave (195 m asl) in Cottonwood Valley. (C) Moderately indurated, cross-stratified, quartz-rich sand and rounded gravel at river level (150 m asl) near Fort Mohave in northern Mohave Valley (note woman and dogs for scale). Photo locations are shown on Figure 12 where
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A) Map of general counting zones and the relative proportions of carbonate, Aztec Sandstone, and Moenkopi Formation clasts. I) proximal Blue Diamond Ridge (n = 1,277), II) medial Blue Diamond Ridge (n = 2,258), III) distal Blue Diamond Ridge (n = 1,955), IV) eastern Cottonwood Valley (n = 267), V) Blue Diamond Hill (n = 476), and IV) Hill 4358′ (n = 474). B, C) Ratio analysis of clast counts in landslide breccia along a W–E transect in Blue Diamond Ridge. Clast populations: carbonate (C), matrix (Ma), Aztec Sandstone (A), Moenkopi Formation (M).
Published: 15 August 2022
Fig. 4. A) Map of general counting zones and the relative proportions of carbonate, Aztec Sandstone, and Moenkopi Formation clasts. I) proximal Blue Diamond Ridge (n = 1,277), II) medial Blue Diamond Ridge (n = 2,258), III) distal Blue Diamond Ridge (n = 1,955), IV) eastern Cottonwood Valley (n
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Stratigraphic column of Brigham Group, overlying Cambrian carbonate rocks exposed in the southern Portneuf Range and overlying Salt Lake Formation strata of Cottonwood Valley. See map in Figure 5 and Salt Lake Formation correlation chart in Figure 6. Pocatello Formation only present in cross sections. *U-Pb detrital zircon maximum depositional age from the upper Scout Mountain Member of the Pocatello Formation (Fanning and Link, 2004; Keeley et al., 2012). **40Ar/39Ar date of 580 ± 7 Ma from a trachyte flow in the Browns Hole Formation of northern Utah (Christie-Blick and Levy, 1989).
Published: 01 December 2015
Figure 3. Stratigraphic column of Brigham Group, overlying Cambrian carbonate rocks exposed in the southern Portneuf Range and overlying Salt Lake Formation strata of Cottonwood Valley. See map in Figure 5 and Salt Lake Formation correlation chart in Figure 6 . Pocatello Formation only present
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A) Digital elevation map showing the current exposed remnants of the Blue Diamond landslide and the original distribution and source area of the landslide as proposed by Page et al. (1998) (modified from Page et al. 1998). Dashed lines are projected areas as proposed by Page et al. (1998). Same location as Figure 1B. Numbers represent the general vicinity in which clast counts and facies observations were grouped (1, proximal Blue Diamond Ridge; 2, medial Blue Diamond Ridge; 3, distal Blue Diamond Ridge; 4, Hill 4358′; 5, Blue Diamond Hill; 6, Eastern Cottonwood Valley). B) Generalized stratigraphic columns for the Keystone and Bird Spring thrust sheets in the study area (modified from Page et al. 1998).
Published: 15 August 2022
. (1998) . Same location as Figure 1 B. Numbers represent the general vicinity in which clast counts and facies observations were grouped (1, proximal Blue Diamond Ridge; 2, medial Blue Diamond Ridge; 3, distal Blue Diamond Ridge; 4, Hill 4358′; 5, Blue Diamond Hill; 6, Eastern Cottonwood Valley). B
Series: GSA Field Guide
Published: 01 January 2005
DOI: 10.1130/2005.fld006(17)
EISBN: 9780813756066
... setting and location of field trip sites in Southern Cottonwood Valley and Mohave Valley. Figure 3. Schematic representation of late Cenozoic stratigraphy of the Colorado River and its piedmont tributaries in northern Mohave Valley. Nomenclature described in text. Figure 11. Surficial...