| Reference Type | Report (issue) |
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| Title | Paleozoic and Mesozoic strata of southwestern and south-central New Mexico |
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| Report | Bulletin |
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| Authors | Kottlowski, F. E. | Author |
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| Year | 1963 |
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| Issue | < 79 > |
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| Publisher | New Mexico Bureau of Geology and Mineral Resources | Place | Socorro, NM |
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| URL | |
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| Download URL | https://geoinfo.nmt.edu/publications/monographs/bulletins/downloads/79/B79_nc.pdf |
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| DOI | doi:10.58799/b-79Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 17309135 | Long-form Identifier | mindat:1:5:17309135:9 |
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| GUID | ea2abb8a-c50e-4af8-813f-d71e9eae7be7 |
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| Full Reference | Kottlowski, F. E. (1963) Paleozoic and Mesozoic strata of southwestern and south-central New Mexico. Bulletin 79. New Mexico Bureau of Geology and Mineral Resources doi:10.58799/b-79 |
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| Plain Text | Kottlowski, F. E. (1963) Paleozoic and Mesozoic strata of southwestern and south-central New Mexico. Bulletin 79. New Mexico Bureau of Geology and Mineral Resources doi:10.58799/b-79 |
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| In | Mineral Resources Survey of New Mexico - Bulletin |
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| Abstract/Notes | Paleozoic strata, totaling 8000 to 11,000 feet in thickness for relatively complete sections, consist of the Cambrian and Ordovician Bliss Sandstone which thins depositionally northward; the Ordovician El Paso Limestone and Montoya Dolomite; the Silurian Fusselman Dolomite; argillaceous Devonian rocks; crinoidal Mississippian limestones; a thin to thick Pennsylvanian sequence; and thick, largely marine Permian strata with basal beds marked by a southward transition from red beds into limestones. Pre-Pennsylvanian units thin northward chiefly because of various erosional episodes but are thick in southern New Mexico. More than 3000 feet of Pennsylvanian beds were deposited west of the Pedernal landmass in north-south-trending basins such as the Orogrande and Pedregosa. Reefoidal masses locally characterize the Ordovician, Mississippian, Pennsylvanian, and Permian limestones.The early Mesozoic was a time of uplift and erosion which accelerated during the Early Cretaceous when all Paleozoic rocks were stripped from the Burro uplift in western Grant County and all the upper Permian beds removed throughout large areas of southwestern New Mexico.Early Cretaceous rocks are 7000 to 20,000 feet thick in the southwestern part of New Mexico and consist of red beds, shoreline sandstones, nearshore conglomerates, fossiliferous biohermal limestones, and volcanic detritus. The northernmost shoreline of this Early Cretaceous sea may have paralleled an east-southeast-trending line from Silver City toward the Cornudas Mountains. Late Cretaceous sediments, the Da- kota(?) Sandstone, Mancos Shale, and Mesaverde Formation, are about 2000 feet thick and rest on middle Permian beds or on a northwardtapering edge of Early Cretaceous strata. The dark Mancos Shales of south-central New Mexico grade southward into the shaly Eagle Ford sandstones near El Paso. Thick sections of latest Cretaceous rocks near Steeple Rock and near Elephant Butte Dam are mainly of conglomeratic volcanic sediments. Erosion during Tertiary time locally removed the Cretaceous strata and cut down to lower Permian beds. |
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