Mississippian Formations of Southwestern New Mexico

Laudon, Lowell Robert; Bowsher, Arthur L.

doi:10.1130/0016-7606(1949)60[1:mfosnm]2.0.co;2

Cited by 52 publications

(71 citation statements)

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“…Previous stratigraphic studies (Laudon & Bowsher, 1941, 1949Pray, 1961 ;Lane, 1974) showed the Lake Valley Formation is entirely Osagean in age. It is uncomformably underlain by the Caballero Formation (Kinderhookian) throughout the Sacramento Mountains (Fig.…”

Section: Physical Stratigraphy and Depositional Facies Of The Lake Vamentioning

confidence: 93%

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Chertification in the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

Meyers

1977

Sedimentology

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Chert distribution in the Lake Valley rocks is selective to mud‐supported facies; it is not related to proximity to unconformities. The facies selectivity of the chertification is believed to be a function of the depositional distribution of indigenous silica as sponge spicules, an interpretation that is supported by high positive qualitative correlation of chert with spiculitic rocks. Petrography indicates that the spicules were all originally siliceous, and that they all went through a moldic stage during which many molds were compactively destroyed and distorted. Remaining molds were subsequently cemented by calcite or chalcedony. Chert distribution and spicule petrography argue for an intraformational source for much of the silica. Chert micro‐fabrics are dominated by microquartz, a replacement of grains and lime mud; length‐fast chalcedony, a pore‐filling cement; and megaquartz, a post‐chalcedony pore‐filling cement. Petrography of compaction features within chert masses indicates that chertification occurred after some burial. Based on stratigraphic reconstruction this burial depth was a maximum of about 215 m. and was most likely a few metres to a few tens of metres. Petrography of chert‐calcite cement relationships indicates that chertification occurred before and during first generation, pre‐Pennsylvanian non‐ferroan calcite cementation, and was completed before late‐stage, post‐Mississippian ferroan calcite precipitation. Petrography of chert clasts in basal Rancheria (Meramecian) and basal Pennsylvanian conglomerates proves these clasts derived from the Lake Valley Formation and were chertified before redeposition. Thus, some cherts in the Lake Valley are pre‐Meramecian in age, but all are pre‐Pennsylvanian in age. Furthermore, association of the cherts with the non‐ferroan cements indicates the cherts were probably precipitated in meteoric phreatic lens established beneath the pre‐Meramecian and pre‐Pennsylvanian subaerial unconformities.

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Section: Physical Stratigraphy and Depositional Facies Of The Lake Vamentioning

confidence: 93%

“…The Arcente-Tierra Blanca contact has also been interpreted to be an intraformational unconformity (Pray, 1961 ;Laudon & Bowsher, 1949). Assuming this is true, it was almost certainly a submarine diastem.…”

Section: Skeletal Packstones and Groinstonesmentioning

confidence: 99%

Chertification in the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

Meyers

1977

Sedimentology

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“…Because of their size, less than 2 mm for adults, microcrinoids, to be described in Downloaded by [Temple University Libraries] The dominance of unornamented inadunate crinoids in this fauna, along with a diverse invertebrate fauna, suggests a transgressive shallow shelf environment (Pabian & Strimple, 1980). Many large crinoid faunas of Palaeozoic age have been reported as proximal to a reef (Laudon & Bowsher, 1949;Manten, 1971;Lane, 1979). However, reefs have not been reported in the Callytharra Formation and Runnegar & Campbell (1976) pointed out that true reefs are unknown and limestones are not common in the cold water Permian deposits of Australia.…”

Section: Palaeoecologymentioning

confidence: 97%

Permian crinoids from the type-section of the Callytharra Formation, Callytharra Springs, Western Australia

Webster

1987

Alcheringa: An Australasian Journal of Palaeontology

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“…of Southwestern New Mexico, (Fig. 1) has been described by Laudon & Bowsher (1949), Armstrong (1962), and by Meyers (in press). Mississippian rocks within the study area comprise the Caballero Fm.…”

Section: Physical Stratigraphy Of Mississippian Stratamentioning

confidence: 73%

Microdolomite-Rich Syntaxial Cements: Proposed Meteoric-Marine Mixing Zone Phreatic Cements from Mississippian Limestones, New Mexico

Meyers

Lohmann

1978

SEPM JSR

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Inclusion-richechinoderm-syntaxialcementscomprise upto38% oftheintergranularcements in Mississippian skeletal calcarenites of the Lake Valley Fro., N.M. These cements have crystal morphology, substrate selectivity, and luminescence characteristics identical to previously interpreted fresh water phreatic cements, yet contain microdolomite inclusions, implying that they were originally Mg calcite. These petrographic characteristics, plus the restriction of the microdolomite-rich syntaxial cements to the lower part of the Lake Valley Fro., argue for their having precipitated in the zone of mixing between meteoric and marine phreatic groundwaters.Petrography of these cements, their association with interpreted fresh water phreatic cements, and their regional restriction to the south, suggest that the mixing zone cements were formed mainly daring the slowing down stages of a late Mississippian global sea level drop.These cements plus other microdolomite-rich calcites reported on elsewhere indicate that coarse crystals of Mg calcite commonly act as closed or semi-closed systems during re-equilibration to low-Mg calcite, rather than undergoing complete loss of Mg through conventional incongruent dissolution.

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Mississippian Formations of Southwestern New Mexico

Cited by 52 publications

References 0 publications

Chertification in the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

Chertification in the Mississippian Lake Valley Formation, Sacramento Mountains, New Mexico

Permian crinoids from the type-section of the Callytharra Formation, Callytharra Springs, Western Australia

Microdolomite-Rich Syntaxial Cements: Proposed Meteoric-Marine Mixing Zone Phreatic Cements from Mississippian Limestones, New Mexico

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