Middle-Upper Miocene Depositional Sequences of the Texas Coastal Plain and Continental Shelf: Geologic Framework, Sedimentary Facies, and Hydrocarbon Plays,

Morton, Robert A.; Jirik, L.A.; Galloway, William E.

doi:10.23867/ri0174d

Cited by 31 publications

(5 citation statements)

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“…The Pliocene-age Goliad Sand consists of clay, sandstone, marl, caliche, limestone, and conglomerate [19]. Fluvial deposits within the Goliad Sand consist of very fine to medium sand, gravelly coarse sand, sandy gravel, and pebble-to-cobble-sized gravel depending on location within the fluvial interfingering sequences or facies (Figure 2) [5,6,20]. The Goliad Sand is bound by regional unconformities at the base of massive fluvial sandstones at outcrop and in the shallow subsurface [5,6].…”

Section: Goliad Sandmentioning

confidence: 99%

Development and Description of a Composite Hydrogeologic Framework for Inclusion in a Geoenvironmental Assessment of Undiscovered Uranium Resources in Pliocene- to Pleistocene-Age Geologic Units of the Texas Coastal Plain

et al. 2022

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A previously completed mineral resources assessment of the Texas Coastal Plain indicated the potential for the future discovery of uranium resources. Geoenvironmental assessments that include the hydrogeologic framework can be used as a tool to understand the potential effects of mining operations. The hydrogeologic framework for this study focused on the composite hydrogeologic unit of the tract permissive for the occurrence of uranium consisting of the upper part of the Miocene-age Fleming Formation/Lagarto Clay, Pliocene-age Goliad and Pleistocene-age Willis Sands, Pleistocene-age Lissie and Beaumont Formations, and Holocene-age alluvial sediments (fluvial alluvium and eolian sand deposits). This composite hydrogeologic unit, which contains the Chicot and Evangeline aquifers of the Gulf Coast aquifer system, is intended for inclusion in a regional-scale geoenvironmental assessment of as yet undiscovered uranium resources. This article provides (1) a brief literature review describing the geologic and hydrogeologic settings, (2) the methodology used to develop a composite hydrogeologic framework, and (3) descriptions and maps of the land-surface altitude, composite hydrogeologic unit base and midpoint depth, water-level altitude, depth of water, unsaturated and saturated zone thickness, and transmissivity and hydraulic conductivity. A composite hydrogeologic unit, created by combining geologic and hydrogeologic data and maps for individual geologic and hydrogeologic units, is intended for use as a tool in a geoenvironmental assessment to evaluate potential contaminant migration through various avenues. Potential applications include using the hydrogeologic framework as an input into a geoenvironmental assessment to help estimate the potential for (1) runoff of contaminants into surface water, (2) infiltration of contaminants into the groundwater (aquifers), or (3) movement of contaminants from the mining area through wind, groundwater-flow, or streamflow in a given permissive tract. The procedures outlined in this paper also provide a method for developing hydrogeologic frameworks that can be applied in other areas where mining may occur.

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Section: Goliad Sandmentioning

confidence: 99%

Development and Description of a Composite Hydrogeologic Framework for Inclusion in a Geoenvironmental Assessment of Undiscovered Uranium Resources in Pliocene- to Pleistocene-Age Geologic Units of the Texas Coastal Plain

et al. 2022

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“…The Fleming Group includes a number of large fluvial systems in up-dip areas that transition to deltaic and marginal marine systems down-dip and to fully marine offshore (Galloway et al, 1986;Morton et al, 1988). Measured thicknesses from outcrop include 215-430 meters in the Lagarto Formation and 90-215 meters in the underlying Oakville Formation (Galloway et al, 1986).…”

Section: Miocene Stratigraphy Of the Texasmentioning

confidence: 99%

Anchitheriomys buceei (Rodentia, Castoridae) from the Miocene of Texas and a review of the Miocene beavers from the Texas Coastal Plain, USA

May

Brown

2023

Palaeontol Electron

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The record of fossil beavers from Miocene age strata in the Texas Coastal Plain is sparse. The first occurrence of fossil beavers is in Arikareean age faunas. One fossil beaver specimen was reported from a Hemingfordian fauna near Navasota, TX. Both Monosaulax and Anchitheriomys are described here from multiple early Barstovian faunas including a new taxon, Anchitheriomys buceei. The taxon, A. buceei, was a relatively large beaver, similar to A. fluminis in size, and shares characters with both A. fluminis and A. nanus. The holotype of Anchitheriomys buceei is a partial skull and endocast that preserves key features of the orbital foramina and palatine. Referred specimens include a partial dentary, isolated cheek teeth, and two post-cranial elements. The co-occurrence of this taxon and a small beaver identified as Monosaulax sp. in early Barstovian faunas is coeval with the first occurrence of proboscideans along the Texas Coastal Plain. Beavers are unknown in late Barstovian and Clarendonian faunas, although rodent fossils are uncommon from these faunas in general. Most of the fossil beaver specimens were obtained in the early twentieth century by collectors affiliated with Dr. Mark Francis at Texas A&M University, or with the State-Wide Paleontologic-Mineralogic Survey in Texas and are curated at the Texas Vertebrate Paleontology Collections. Archival materials housed at that facility have been instrumental in unraveling the history of collection, the distribution of localities and the evolving understanding of Miocene vertebrate biostratigraphy on the Texas Coastal Plain.

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“…Subsequent workers (Solis, 1981;Hoel, 1982;Morton et al, 1988;Young et al, 2010) incorporated abundant subsurface data in their stratigraphic analysis and abandoned the three-part stratigraphy, recognizing only a lower and upper Goliad Formation. Solis (1981) published a series of well log cross-sections and associated maps for the Late Tertiary and Quaternary of the central Texas coastal plain.…”

Section: History and Terminologymentioning

confidence: 99%

“…Based largely on lithostratigraphic correlation, Hoel (1982) recognized four main depositional systems, each of which included axial fluvial deposits separated by overbank and floodplain. Morton et al (1988) published a general sequence stratigraphic model for the middle and upper Miocene of the Texas coastal plain that was tied to marine biostratigraphy. In their paper, they chose not to subdivide the Goliad Formation, but correlated it with early Serravallian, Tortonian and Messinian stages.…”

Section: History and Terminologymentioning

confidence: 99%

“…Root casts are locally abundant in the floodplain soils. Based on vertical stacking of sand fairways observed on well logs, fluvial channels apparently occupied consistent locations on the coastal plain (Morton et al, 1988). Hoel (1982) suggested that poorly developed channel levees likely resulted from the lack of bank-stabilizing vegetation.…”

Section: Depositional Environmentsmentioning

confidence: 99%

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The Lapara Creek Fauna: Early Clarendonian of south Texas, USA

May

2019

Palaeontol Electron

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The Lapara Creek Fauna includes a large collection of fossil vertebrates obtained by the StateWide Paleontologic-Mineralogic Survey in Texas (1939-1941) under the direction of the Bureau of Economic Geology and the Texas Memorial Museum. Of the 50 species of fossil vertebrates, five species are fish, seven are reptiles, two are birds and 36 are mammals. The 36 species of mammals represent 31 genera of which four are rodents, five are carnivores, two are proboscideans, 10 are artiodactyls and 10 are perissodactyls. These taxa are known from four separate local faunas distributed within the lower to middle parts of the Goliad Formation and are Clarendonian in age. The Ten Mile Waterhole Creek and Bridge Ranch local faunas compare well with Cl1 faunas in North America, while the Farish Ranch and Buckner Ranch local faunas compare well with early Cl2 faunas. The fauna includes the first occurrence, or at least very early occurrences, of cf. Trachemys sp., Apalone sp., Alligator cf. mississippiensis and cf. Eucyon sp. Identification of Ceratogaulus cf. rhinoceros extends the known geographic range of this taxon and represents the oldest occurrence of a mylagaulid from the Texas coastal plain. Blancotherium buckneri is a new generic name assigned to a longirostrine gomphothere that is represented by numerous specimens from the Buckner Ranch Local Fauna. The diverse horse fauna includes 12 species representing nine genera, all but one of which are hypsodont. The composition of the fauna is consistent with the widespread Clarendonian Chronofauna and with a mixed woodland-grassland environment on a broad floodplain associated with low-gradient rivers.

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Middle-Upper Miocene Depositional Sequences of the Texas Coastal Plain and Continental Shelf: Geologic Framework, Sedimentary Facies, and Hydrocarbon Plays,

Cited by 31 publications

References 0 publications

Development and Description of a Composite Hydrogeologic Framework for Inclusion in a Geoenvironmental Assessment of Undiscovered Uranium Resources in Pliocene- to Pleistocene-Age Geologic Units of the Texas Coastal Plain

Development and Description of a Composite Hydrogeologic Framework for Inclusion in a Geoenvironmental Assessment of Undiscovered Uranium Resources in Pliocene- to Pleistocene-Age Geologic Units of the Texas Coastal Plain

Anchitheriomys buceei (Rodentia, Castoridae) from the Miocene of Texas and a review of the Miocene beavers from the Texas Coastal Plain, USA

The Lapara Creek Fauna: Early Clarendonian of south Texas, USA

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