The Comanche Series of the Texas-Arkansas Region

Hill, Robert Thomas

doi:10.1130/gsab-2-503

Cited by 25 publications

(17 citation statements)

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“…The Glen Rose Formation was first described by Shumard (1860) as the Caprotina Limestone, and was given its present name by Hill (1891). Together, the Glen Rose and the underlying Hensel Sandstone form the last of two or three major transgressiveregressive cycles in the Trinity Group (Hayward & Brown 1967;Hendricks 1967;Stricklin et al 1971;Mancini & Scott 2006).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…Sections in this area were described in detail by Rodgers (1967), analyzed sedimentologically by Nagle (1968), Perkins (1979) and Bergan (1987Bergan ( , 1991, and integrated with subsurface stratigraphy by Pittman (1989). Here the Glen Rose Formation is divided into a lower and an upper member separated by a massive limestone unit called the Thorp Spring Member (Hill 1891). It reaches a total thickness of ca.…”

Section: Geological Backgroundmentioning

confidence: 99%

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Early Cretaceous (Albian) spores and pollen from the Glen Rose Formation of Texas and their significance for correlation of the Potomac Group

Tanrikulu¹,

Doyle

Delusina

2017

Palynology

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Because the Gulf Coast Lower Cretaceous is dated by ammonites, it has great potential as a reference section for correlating continental sequences such as the Potomac Group and dating events in the rise of angiosperms. Middle Albian terrestrial palynofloras from Oklahoma have been described in detail, but the early Albian interval, represented in the Glen Rose Formation of Texas, is less well known. Samples from two localities on the Paluxy River, which correlate with horizons containing late early Albian ammonites, are dominated by Classopollis and Exesipollenites, but angiosperm pollen is the next most common terrestrial element, and there are several index spore species for Zone II in the Potomac Group. Among the angiosperms, reticulate monosulcates are most common and diverse, but there are also several tricolpate species. Stratigraphically important angiosperms include the Clavatipollenites rotundus group and reticulate tricolpates, which appear in the upper part of Potomac Zone I and the dated earliest Albian of England and Portugal. However, there are also tricolpates with striate-reticulate sculpture, a pollen type that is not known from upper Zone I but appears in the late early Albian of Portugal. This assemblage contrasts with floras from Potomac Zone II and the middle Albian (lower Fredericksburg Group) of Oklahoma, where tricolpates overtook monosulcate angiosperms in species diversity. These results confirm arguments based on the Portuguese section that there is a significant hiatus between Potomac Zones I and II, and that this gap is at least partly late early Albian. The dominance of Classopollis and Exesipollenites and the occurrence of isolated Northern Gondwanan elements (Sergipea, Tucanopollis) suggest that Texas lay in a transition zone between Southern Laurasia and the hotter and drier Northern Gondwana province, but regional studies are needed to disentangle geographic and climatic factors from effects of the lagoonal local environment.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

Early Cretaceous (Albian) spores and pollen from the Glen Rose Formation of Texas and their significance for correlation of the Potomac Group

Tanrikulu¹,

Doyle

Delusina

2017

Palynology

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“…These three transgressional "couplets" deposited sediments that formed (1) the Hosston and Sligo Formations (Imlay, 1940); (2) the Hammett Shale (Lozo and Stricklin, 1956) and the Cow Creek Limestone (Hill, 1901); and (3) the Hensell Sand (Hill, 1901) of the Pearsall Formation and the Glen Rose Limestone (Hill, 1891; (Rose, 1972;Maclay and Small, 1986). The basal nodular member of the Fort Terrett Formation (Maclay and Small, 1986) was deposited in a subtidal environment at the beginning of a marine transgressional cycle (Rose, 1972).…”

Section: Geologic Frameworkmentioning

confidence: 99%

Geologic framework, hydrostratigraphy, and ichnology of the Blanco, Payton, and Rough Hollow 7.5-minute quadrangles, Blanco, Comal, Hays, and Kendall Counties, Texas

Clark¹,

Golab²,

Morris³

2016

Scientific Investigations Map

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Clark, A.K., Golab, J.A., and Morris, R.R., 2016, Geologic framework, hydrostratigraphy, and ichnology of the Blanco, Payton, and Rough Hollow 7.5-minute quadrangles, Blanco, Comal, Hays, and Kendall Counties, Texas (ver. 1.1, September 20, 2016) AcknowledgmentsThis study was completed on both public and private lands, and the authors would like to extend their thanks to the landowners and managers in Blanco, Comal, Hays, and Kendall Counties who provided access to their property, which greatly improved the completeness and accuracy of this study. Geologic AbstractThis report presents the geologic framework, hydrostratigraphy, and ichnology of the Trinity and Edwards Groups in the Blanco, Payton, and Rough Hollow 7.5-minute quadrangles in Blanco, Comal, Hays, and Kendall Counties, Texas.

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“…These three distinct "couplets" deposited sediments that formed (1) the Hosston and Sligo Formations (Imlay, 1940); (2) the Hammett Shale Member (Lozo and Stricklin, 1956) and the Cow Creek Limestone Member (Hill, 1901) of the Pearsall Formation (Imlay, 1940); and (3) the Hensell Sand Member (Hill, 1901) of the Pearsall Formation, as well as the lower and upper members of the Glen Rose Limestone (Hill, 1891).…”

Section: Geologic Frameworkmentioning

confidence: 99%

Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Bexar and Comal Counties, Texas

Clark¹,

Golab²,

Morris³

2016

Scientific Investigations Map

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The Comanche Series of the Texas-Arkansas Region

Cited by 25 publications

References 0 publications

Early Cretaceous (Albian) spores and pollen from the Glen Rose Formation of Texas and their significance for correlation of the Potomac Group

Early Cretaceous (Albian) spores and pollen from the Glen Rose Formation of Texas and their significance for correlation of the Potomac Group

Geologic framework, hydrostratigraphy, and ichnology of the Blanco, Payton, and Rough Hollow 7.5-minute quadrangles, Blanco, Comal, Hays, and Kendall Counties, Texas

Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within northern Bexar and Comal Counties, Texas

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