Solution-collapse breccia pipes of Spanish Valley, southeastern Utah

Weir, Gordon Whitney; Puffett, Willard P.; Dodson, Chester L.

doi:10.3133/ofr94417

Cited by 3 publications

(2 citation statements)

References 17 publications

(3 reference statements)

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“…One of the most plausible explanations for pipe‐like masses of sandstone at many sites in the Colorado Plateau involves solution‐collapse (Weir et al ., 1961; Barrington & Kerr, 1963; Schlee, 1963; Wenrich, 1985; Hunter et al ., 1992). Solution‐collapse begins with the formation of an underground cavity in soluble rock, into which the overlying sediment or rock collapses, which explains the slumping and faulting observed in those pipes.…”

Section: Previous Workmentioning

confidence: 99%

Seismogenically induced fluidization of Jurassic erg sands, south‐central Utah

Netoff¹

2002

Sedimentology

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Large bodies of fluidized sandstone occur in the Jurassic Entrada, Carmel, Page and Navajo Formations at several locations in south‐central Utah. They are most abundant in the Entrada Sandstone, where they commonly occur in clusters, have a cylindrical form and have a sharp contact with their cross‐bedded host rock. These clastic pipes are as wide as 75 m and have exposed heights of as much as 100 m. Some of the Entrada pipes extend well into the underlying Carmel redbeds. Other clastic pipes in the Entrada Sandstone are less deformed and display various degrees of brittle‐to‐hydroplastic deformation and liquefaction. Clastic pipes in the Page and Navajo Sandstones are less common, but are similar in size and form to those in the Entrada and Carmel, and probably have a similar origin. Some massive sandstone bodies are irregular in form and have tongue‐like projections into the host rock, implying forcible injection of fluidized sand. Several pipe–host contacts in the Entrada Sandstone display small‐scale ring faults. Where relative displacement can be clearly demonstrated, pipe sandstones are invariably down‐faulted, locally as much as 5 m. At two sites, Carmel host rock is upwarped around the Entrada pipes. Stratified and cross‐bedded breccia blocks occur in many Entrada pipes, and preliminary petrographic analysis indicates that at least some of these breccia blocks are derived from the host rock. Homogeneous pipe sandstones are also petrographically similar to their Entrada host rock, suggesting that some pipes originate through fluidization of the fine‐grained Entrada. Fluidization of the Entrada must have occurred in a water‐saturated environment during early diagenesis but before complete lithification, most probably under considerable porewater pressure. Although there are no known modern analogues to these huge masses of structureless sandstone, they may have a small‐scale modern counterpart in earthquake‐induced sandblows. These features were most probably caused by large‐magnitude seismic events during the Middle Jurassic, although other possibilities cannot be ruled out at this point.

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Section: Previous Workmentioning

confidence: 99%

Seismogenically induced fluidization of Jurassic erg sands, south‐central Utah

Netoff¹

2002

Sedimentology

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“…Moreover, numerous breccia pipe collapse features a t t r i b u t e d t o a dissolutioning-stoping mechanism have been i d e n t i f i e d i n the Spanish Valley (Sugiura and Kitcho, 1981;Weir e t al., 1961). Such breccia has been mapped about 8 km (5 miles) from the s i t e a t Arches N.P.…”

Section: The Roberts Rift Is Brecciated and Mineralized Andmentioning

confidence: 99%

Final technical evaluation report for the proposed revised reclamation plan for the Atlas Corporation Moab Mill

1997

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This final Technical Evaluation Report (TER) summarizes the U.S. Nuclear Regulatory Commission staff's review of Atlas Corporation's proposed reclamation plan for its uranium mill tailings pile near Moab, Utah. proposed reclamation would allow Atlas to (1) reclaim the tailings pile for permanent disposal and long-term custodial care by a government agency in its current location on the Moab site, (2) prepare the site for closure, and (3) relinquish responsibility of the site after having its NRC license terminated. The NRC staff concludes that, subject to 1 icense conditions identified in the TER, the proposed reclamation plan meets the requirements identified in NRC regulations, which appear primarily in 10 CFR Part 40. The i i i NUREG-1532 ATLAS MOAB MILL TER TABLE OF CONTENTS Secti on Paqe This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expms or implied, or assumes any legal liability or respolsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disdosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, proas, or service by trade name, trademark, manufacturer, or otherwise does not Wcessany constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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Clastic Pipes and Soft-Sediment Deformation of the Jurassic Carmel Formation, Southern Utah, U.S.A.: Implications For Pipe Formation Mechanisms and Host-Rock Controls

Wheatley

Chan

2018

Journal of Sedimentary Research

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Solution-collapse breccia pipes of Spanish Valley, southeastern Utah

Cited by 3 publications

References 17 publications

Seismogenically induced fluidization of Jurassic erg sands, south‐central Utah

Seismogenically induced fluidization of Jurassic erg sands, south‐central Utah

Final technical evaluation report for the proposed revised reclamation plan for the Atlas Corporation Moab Mill

Clastic Pipes and Soft-Sediment Deformation of the Jurassic Carmel Formation, Southern Utah, U.S.A.: Implications For Pipe Formation Mechanisms and Host-Rock Controls

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