Mississippian of Southeastern New Mexico and West Texas--A Wedge-on-Wedge Relation

Lane, H. Richard

doi:10.1306/83d913d0-16c7-11d7-8645000102c1865d

Cited by 11 publications

(17 citation statements)

References 7 publications

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“…The Rancheria Formation is poorly fossiliferous, except for the crinoids in the uppermost strata. On the basis of conodont studies, Lane (1974) confirmed Lau-don and Bowsher's earlier (1949) assignment of the Rancheria to the Meramecian and Chesterian (late middle to Late Mississippian).…”

Section: Rancheria Formationsupporting

confidence: 79%

“…Crinoidal beds are common, and some limestones contain a rich fauna of unbroken bryozoans, brachiopods, corals, trilobites, snails, and other mollusks. These fossils, as well as the conodonts recovered by Lane (1974), indicate a Chesterian (Late Mississippian) age and a shallow-marine environment for the Helms.…”

Section: Helms Formationmentioning

confidence: 73%

“…Other than local skeletal grains, no fossils were found in the Las Cruces Formation. An 0sagian and Meramecian (late middle Mississippian) age is based on the studies of Laudon and Bowsher (1949) and Lane (1974). Lane also suggested that the Las Cruces represented a basin facies that is correlative with the shelf limestones of the Doña Ana Member of the Lake Valley Formation.…”

Section: Las Cruces Formationmentioning

confidence: 99%

“…Atokan (Derryan) fusulinids were identified from basal Berino beds, so it seems likely that up-per parts of the La Tuna also are of Atokan age. Lane (1974) states that the La Tuna is of earliest Morrowan age and Harbour (1972) reports Millerella sp. of Morrowan age from the lower part of the La Tuna.…”

Section: La Tuna Formationmentioning

confidence: 99%

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Geology of Organ Mountains and southern San Andres Mountains, New Mexico

Seager¹

1981

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The Organ and southernmost San Andres Mountains in south-central New Mexico are part of a 150-mi long, west-tilted fault block extending from El Paso, Texas, northward to central New Mexico. The Organ Mountains tower nearly a mile above the floor of the Tularosa Basin on the east and the Rio Grande valley on the west. Oldest rocks exposed are Precambrian granite, overlain by as much as 8,500 ft of mostly marine Paleozoic and Cretaceous strata. In Laramide time, these rocks were deformed along the faulted margins of a basement-cored block uplift which was ancestral to the modern Organ-San Andres range. Lower Tertiary fanglomerate, at least 2,000 ft thick, records the erosional "unroofing" of the Laramide uplift and was sharply deformed as uplift progressed. Magmatism profoundly affected the area in middle Tertiary time. Intermediate composition lava and mudflow breccia of late Eocene or early Oligocene age buried the deeply eroded Laramide uplift. The Organ batholith (about 32.8 m.y. old) is interpreted to be an exposure of the upper, outer part of a magma chamber whose silicic cap erupted as pyroclastic flows and lavas 33.0-33.7 m.y. ago. The pyroclastic rocks, approximately 2 mi thick, subsided to form the Organ cauldron, only a piece of which is exposed in the Organ Mountains today. The pyroclastic rocks also formed the roof beneath which the batholith crystallized. Compositional zoning within the volcanics indicates that the erupted magma volume was also zoned, ranging from 77 percent SiO2 at the top to about 65 percent at lowest levels. The batholith represents deeper, less silicic (56-68 percent) levels of the magma chamber, and late-stage mineralized plutons within the batholith are interpreted to be products of the progressive crystallization of the magma chamber. Undated tristanite-trachybasalt flows interbedded with fanglomerate may indicate onset of late Tertiary block faulting in the area. Subsequent uplift of the modern ranges involved an early stage of closely spaced faulting associated with moderate west tilting or, locally, east downwarping. Some faults, initially steep, were rotated into low-angle positions as tilting progressed. The more recent stage of uplift is distinguished by development of the modern, widely spaced range-boundary faults and their associated horsts, west-tilted blocks, and grabens. Movement on the eastern range-boundary fault of the Organ and southern San Andres fault block has persisted to within the last 4,000-5,000 yrs. Several generations of alluvial fans, as old as middle Pliocene, are products of repeated movement on these faults. Mineral deposits related to the Organ batholith include base-metal deposits as replacements in limestone and dolomite, and as disseminations, vein fillings, and pegmatite minerals in the batholith.

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Section: Rancheria Formationsupporting

confidence: 79%

Section: Helms Formationmentioning

confidence: 73%

Section: Las Cruces Formationmentioning

confidence: 99%

Section: La Tuna Formationmentioning

confidence: 99%

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Geology of Organ Mountains and southern San Andres Mountains, New Mexico

Seager¹

1981

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“…Among these, the most recent study by Kues (1986) provides a comprehensive list of fauna from the type section. All workers agree that the Lake Valley fauna is Osagean (Early Mississippian) in age (Kottlowski, 1963;Lane, 1974;Armstrong et al, 1979;Lane and DeKeyser, 1980;Lane and Ormiston, 1982;Kues, 1986). In the Caballo region, the Lake Valley is seemingly conformable with the underlying Percha Shale, although a minor disconformity may separate them.…”

Section: Lake Valley Formationmentioning

confidence: 99%

Geology of the Caballo Mountains, New Mexico

Seager¹,

Mack²

2003

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The Caballo Mountains, just south of Truth or Consequences, rise to an elevation of 7,065 feet. Today they are flanked on the west side by Caballo Reservoir and on the east side by the Jornada del Muerto. An extraordinary geologic section is preserved here. Precambrian igneous and metamorphic rocks (granites and schists) provide a view of the Precambrian history of this part of the country, and an extraordinary thickness of sedimentary rocks (whose collective thickness is more than 3.5 miles) gives us an unparalleled picture of the evolution of southern New Mexico. Development of these mountains began with compression and uplift associated with the Laramide orogeny, at the end of the Mesozoic. Since then the complex geologic history of this part of New Mexico has included uplift, erosion, faulting, volcanic activity, continental deposition, and, finally, the development of the Rio Grande rift. That complex geologic history is well documented in this volume. This memoir is the result of many years of study and field work on the part of the authors, who have drawn together in one place this comprehensive description of the region. The volume is heavily illustrated with photographs, maps, stratigraphic sections, and other graphics. It contains both an index and a glossary.

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Carbonate submarine fan deposits of the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

Bishop

Bachtel²,

Thompson

et al. 2023

The Depositional Record

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Deepwater carbonate deposition is relatively poorly understood but an area of vigorous research in academia and industry, where these deposits are a significant component of many unconventional petroleum reservoirs. Recent studies of modern deepwater carbonates have highlighted the wide variety of depositional processes, sediment types and resultant geomorphology; however, well‐documented outcrops of ancient systems, their rock types and architecture are relatively sparse. The Mississippian Lake Valley Formation provides world‐class exposures of slope‐basinal carbonate deposits. The Tierra Blanca and Doña Ana members comprise submarine fans that are >14 to 20 km in length, >5 km wide, and exposed in strike and dip view, affording a unique opportunity to constrain the architecture, rock types and sedimentary processes. Tierra Blanca and Doña Ana sedimentation was dominated by crinoids shed from an up‐dip platform and supplemented by sediments sourced locally from Waulsortian mounds. Depositional processes include turbidity flows, debris flows and hybrid sediment‐gravity flows. The Tierra Blanca submarine fan thins towards its lateral flanks and distal fringe, where deposits become more mud‐dominated, gravelly grain‐supported flows are less common, and fewer beds have scoured bases. In proximal settings, bed tracing complemented by measured sections allow mapping of stratal surfaces and identification of stories, elements and complexes. The Tierra Blanca evolved from more unconfined to confined deposition. Point‐sourced deposition of the Tierra Blanca fan required a funnelling mechanism, likely due to bathymetry created by Waulsortian mounds or possibly a platform margin re‐entrant. Outcrop exposures illustrate that younger Doña Ana submarine fan deposits onlap onto, and compensationally stack with, the thickest portions of the antecedent Tierra Blanca fan. These outcrops illustrate both similarities and differences between carbonate and siliciclastic gravity flow deposits. Similarities include comparable deposit types, depositional processes and architecture; differences relate to hydrodynamics of carbonate grains, funnelling mechanisms for point‐sourced deposits and sequence stratigraphic forcing.

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Mississippian of Southeastern New Mexico and West Texas--A Wedge-on-Wedge Relation

Cited by 11 publications

References 7 publications

Geology of Organ Mountains and southern San Andres Mountains, New Mexico

Geology of Organ Mountains and southern San Andres Mountains, New Mexico

Geology of the Caballo Mountains, New Mexico

Carbonate submarine fan deposits of the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

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