Geology of the Capitol Reef area, Wayne and Garfield Counties, Utah

Smith, J. Fred; Huff, L.C.; Hinrichs, E.N.; Luedke, Robert G.

doi:10.3133/pp363

Cited by 23 publications

(14 citation statements)

References 24 publications

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“…An ice cap covered much of the flat summit surface during glacial maxima with outlet glaciers flowing over the summit escarpment down broad glacial valleys (Flint and Denny, 1958;Smith et al, 1963). Erosional and depositional evidence from these glacial events has been studied and mapped by Flint and Denny (1958), slight modification of this original mapping was done by Smith et al (1963) and Billingsley et al (1987). Correlation of Boulder Mountain glacial advances with downstream fluvial terraces of the Fremont River was done by Howard (1970).…”

Section: Study Areamentioning

confidence: 95%

“…Boulder Mountain is particularly susceptible to mass movement from the presence of the Flagstaff Limestone underlying the basaltic-andesites that cap the mountaintop. The Paleocene-Eocene Flagstaff Formation consists of limestones, tuffaceous sediments, thin sands, silts, and weakly cemented pebble conglomerates (Smith et al, 1963;Billingsley et al, 1987). The formation is~150 m thick and poorly exposed.…”

Section: Debris Flow Depositsmentioning

confidence: 99%

“…Whole rock basalticandesite samples had U concentrations ranging from 5.2 to 5.6 (mean 5.3) ppm and Th concentrations ranging from 14.4 to 16.5 (mean 15.9) ppm. Light element percentages were calculated using the Boulder Mountain basaltic-andesite bulk chemical data presented in Smith et al (1963) and Mattox (1991). The neutron production rate is strongly controlled by the neutron capture probability of the rock matrix (Andrews and Kay, 1982).…”

Section: Theoretical Estimates Of Nucleogenic 3 Hementioning

confidence: 99%

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Cosmogenic 3He exposure ages of Pleistocene debris flows and desert pavements in Capitol Reef National Park, Utah

Marchetti

Cerling

2005

Geomorphology

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Section: Study Areamentioning

confidence: 95%

Section: Debris Flow Depositsmentioning

confidence: 99%

Section: Theoretical Estimates Of Nucleogenic 3 Hementioning

confidence: 99%

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Cosmogenic 3He exposure ages of Pleistocene debris flows and desert pavements in Capitol Reef National Park, Utah

Marchetti

Cerling

2005

Geomorphology

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“…The contact between the Chinle Group (or Formation) and the Glen Canyon Group is commonly placed at the base of the Wingate Sandstone where desiccation mud cracks in the tops of the underlying Rock Point Member on April 13, 2015 gsabulletin.gsapubs.org Downloaded from (Dubiel, 1989), Church Rock Member (Smith et al, 1963), and Dolores Formation (Blodgett, 1984) are fi lled with Wingate eolian sand that infi ltrated downward into open cracks. This contact has been termed the J-0 unconformity (Pipiringos and O'Sullivan, 1978) at the base of Colorado Plateau Jurassic strata, but the sedimentology of the contact suggests progradation of eolian sand dunes across an unconsolidated substratum of mud-cracked red beds with no signifi cant hiatus in deposition and no erosion of the substratum.…”

Section: Basal Contactmentioning

confidence: 99%

U-Pb ages of detrital zircons in Jurassic eolian and associated sandstones of the Colorado Plateau: Evidence for transcontinental dispersal and intraregional recycling of sediment

Dickinson

Gehrels

2009

Geological Society of America Bulletin

262

203

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U-Pb ages for 1655 individual detrital zircon grains in 18 samples of eolian and associated marine and fl uvial sandstones of the Glen Canyon and San Rafael Groups from the Colorado Plateau and contiguous areas shed light on patterns of Jurassic sediment dispersal within Laurentia. Most detrital zircon grains in Jurassic eolianites were derived ultimately from basement provinces older than 285 Ma in eastern and central Laurentia, rather than from rock assemblages of the nearby Cordilleran margin. The most prominent peaks of constituent age populations at 420 Ma, 615 Ma, 1055 Ma, and 1160 Ma refl ect derivation from Paleozoic, Neoproterozoic, and Grenvillian sources within the Appalachian orogen or its sedimentary cover. Sediment was transported to a position upwind to the north of the Colorado Plateau by a transcontinental paleoriver system with headwaters in the central to southern Appalachian region, but subordinate non-Appalachian detritus was contributed by both northern and southern tributaries during sediment transit across the continent. Subordinate detrital zircons younger than 285 Ma in selected Middle to Upper Jurassic eolianites were derived from the Permian-Triassic East Mexico and the MesozoicCordilleran magmatic arcs. Lower Jurassic fl uvial sandstones typically contain a mixture of detrital zircons redistributed from eolian sand and derived from the East Mexico arc, which lay up-current to the southeast. Zircons in marine Curtis sandstone were largely reworked from underlying Entrada eolianite, with minor contributions from the Jurassic backarc igneous assemblage of the Great Basin. Once mature quartzose detritus was dispersed widely across southwest Laurentia by a transcontinental paleoriver system and paleowinds, which deposited extensive Jurassic ergs, durable zircon grains were recycled by multiple intraregional depositional systems. Lower Jurassic fl uvial sand is locally composed, however, of detritus derived from the nearby Cordilleran magmatic arc assemblage and its Precambrian basement.

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“…Cross‐bed sets commonly exceed 30 m in thickness. The sand grains are well rounded and poorly cemented [ Smith et al , 1963]. …”

Section: Geologic Settingmentioning

confidence: 99%

The formation of conjugate normal fault systems in folded sandstone by sequential jointing and shearing, Waterpocket monocline, Utah

Davatzes

Aydin

2003

J. Geophys. Res.

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[1] We report conjugate normal fault development by the formation and subsequent shearing of joints during flexure and associated extension of the Jurassic Wingate and Navajo Sandstones at the core of the Waterpocket monocline, Utah. Geometry and structural components across fault zones were quantified from an incipient stage to a relatively well-developed stage where the zone is 120 m wide and accommodates more than 3.5 m of slip. Shearing of joints leads to the formation of splay fractures near the joints' tip. Subsequently, these splay fractures are sheared and a new generation of splay fractures forms. Multiple generations of splay fractures cause the width of the fault damage zone to expand into the surrounding host rock, producing unusually wide fault damage zones with respect to fault offset. These extensive fault damage zones are stratigraphically confined and develop with low strains at small bed dips during folding. The faults formed by this sequential process develop a characteristic fault architecture distinguished by the type of component structures, their geometric relationships, and their distribution. We conclude that cyclic joint formation, shearing accompanied by splay fracture formation, and repeated shearing produce a geometric pattern similar to a classical conjugate fault system. However, the mechanism identified here has different implications for fault intersection angles, stress inversion, and fault architecture.

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Geology of the Capitol Reef area, Wayne and Garfield Counties, Utah

Cited by 23 publications

References 24 publications

Cosmogenic 3He exposure ages of Pleistocene debris flows and desert pavements in Capitol Reef National Park, Utah

Cosmogenic 3He exposure ages of Pleistocene debris flows and desert pavements in Capitol Reef National Park, Utah

U-Pb ages of detrital zircons in Jurassic eolian and associated sandstones of the Colorado Plateau: Evidence for transcontinental dispersal and intraregional recycling of sediment

The formation of conjugate normal fault systems in folded sandstone by sequential jointing and shearing, Waterpocket monocline, Utah

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