Depositional systems in Canyon Group (Pennsylvanian System), north-central Texas,-97.3967,34.4469,32.5167
dc.coverage.spatialNorth-Central Texas
dc.creatorErxleben, A. W.
dc.descriptionTo obtain a print version of this publication visit: and search for: RI0082. Plate I : Geologic map. Plate II : Cross section, upper Wolf Mountain Formation, based on measured sections. Plate III : Cross section, Placid Formation, based on measured sections. Plate IV : Net-sandstone map, Wolf Mountain Formation. Plate V : Net-limestone map, Winchell Limestone. Plate VI : Net-sandstone map, Placid Formation. Plate VII : Net-limestone map, Ranger Limestone. Plate VIII : Net-sandstone map, Colony Creek Formation. Plate IX : Net-limestone map, Home Creek Limestone
dc.description.abstractThe Canyon Group (Missourian Series) is a sequence of westward-dipping, genetically related carbonate and terrigenous clastic facies that crop out in a northeast-southwest belt across North-Central Texas. The section includes stratigraphic units between the base of the Palo Pinto Limestone and the top of the Home Creek Limestone. Surface and subsurface studies within thirteen counties indicate that the terrigenous clastic rocks are principally component facies of high-constructive delta systems. The Perrin delta system repeatedly prograded westward and northwestward from source areas in the Ouachita foldbelt. Algal-crinoid banks flanked the Perrin delta system on the northeast and southwest. A typical vertical deltaic sequence includes (upward) (a) organic-rich prodelta mudstone, devoid of invertebrate fossils; (b) thin, distal delta-front sandstone and mudstone, displaying graded beds, sole marks, and flow rolls; (c) thicker proximal delta-front sandstone, exhibiting contorted beds, flow rolls, and contemporaneous faults; (d) locally contorted distributary-mouth bar sandstone; and (e) distributary channel sandstone, containing abundant trough cross-stratification and local clay-chip conglomerate. Thin, coal-bearing delta-plain deposits occur locally on top of deltaic sequences. All delta facies are rich in plant debris. During delta abandonment and destruction, shallow bay-lagoon environments developed. Destructional facies include bioturbated sandy mudstone, burrowed sandstone, and thin, platy argillaceous limestone with abundant invertebrate fossils. Fossiliferous mudstone facies grade upward into transgressive shelf-carbonate facies commonly composed of phylloid algal-crinoid biomicrudite and local intraclastic biosparite shoal facies. Shelf carbonates include onlapping sheetlike deposits, thick, elongate bank deposits which stood above the sea floor with slight bathymetric relief, massive platform carbonate, and shelf-edge reef-bank accumulations. The Henrietta fan-delta system, occurring exclusively in the subsurface of Montague, Clay, Wichita, Archer, and Baylor Counties, is composed of thick wedges of feldspathic sandstone and conglomerate that were deposited by high-gradient fluvial systems which built southwestward into northern Texas from source areas in the Wichita-Arbuckle Mountains of southern Oklahoma.
dc.description.departmentUT Libraries
dc.description.departmentBureau of Economic Geology
dc.format.dimensionsv, 75 p. : ill., maps (9 fold. in pocket) ; 28 cm.
dc.publisherUniversity of Texas at Austin. Bureau of Economic Geology
dc.relation.ispartofVirtual Landscapes of Texas
dc.relation.ispartofReport of Investigations
dc.relation.ispartofseriesReport of Investigations (University of Texas at Austin. Bureau of Economic Geology), no. 82
dc.subjectGeology -- Stratigraphic -- Pennsylvanian
dc.subjectPaleoecology -- Texas
dc.titleDepositional systems in Canyon Group (Pennsylvanian System), north-central Texas

Access full-text files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
220.18 MB
Adobe Portable Document Format