The Mollusca of the Buda LimestoneU.S. Government Printing Office, 1903 - 94 Seiten |
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Anatina anteriorly Austin austinensis sp Barroisiceras Bartons Creek beak Bouldin Creek breadth Buda limestone Cardium Protocardia Collection.-United States National Collections.-Johns Hopkins University columella Comanche series concave conspicuous corallum costæ Cret Description.-Shell large Description.-Shell medium Description.-Shell small Dimensions.-Length Eagle Ford Exogyra Exogyra clarki sp figs formation Fusus Genus Geological Survey globose hinge line straight inequilateral left valve Leptophyllia sp lines of growth Linnæus Locality.-Shoal Creek Lower Cretaceous muscle impression National Museum Nautilus texanus Shumard Onion Creek Ostrea Pecten roemeri Hill poorly preserved portion posterior margin posteriorly Ptychomya ragsdalei Cragin radiating ribs region Rept ridges right valve septa shell Shoal Creek Shoal Creek limestone slightly curved species specimen SPONDYLUS subovate Surv sutures texana sp texanum sp Texas thick Travis County tubercled ribs tubercles U. S. Geol U. S. Mex umbilicus umbonal umbos United States Geological United States National ventral margin Vola Wayland Vaughan whorl
Beliebte Passagen
Seite 8 - HILL, RT, Geography and geology of the Black and Grand Prairies, Texas: US Geol. Survey Twenty-first Ann. Rept., pt. 7, 1901.
Seite 7 - HILL, RT On the occurrence of artesian and other underground waters in Texas, eastern New Mexico, and Indian Territory, west of the ninety-seventh meridian; a report on irrigation, etc.
Seite 30 - The costae are prominent and joiu the corallites one to another. The usual number of septa is 20, 10 small and 10 large; they are much thicker at the wall than in the costal or inner portion. The lateral faces bear rather tall, erect spines. Exotheca present ; endotheca rare. Columella poorly developed, composed of a few processes from the inner ends of the septa. Locality. — Shoal Creek, Texas. Type. — Johns Hopkins University. Remarks. — The specimens referred to this species are embedded...
Seite 8 - A Comparative Study of the Lower Cretaceous Formations and Faunas of the United States. Jour. Geol., vol. V, pp.
Seite 30 - XXVH, fig. 6. Corallum forming rather large masses, as much as 140 mm. high and more than that much across. The corallites are small, the usual diameter being between 1 and 2 mm.; they are crowded or not, the distance between adjacent corallites being in some cases as great as the diameter of the corallites. The costa* are prominent and join the corallites one to another.
Seite 8 - Texas was confined to collecting from the Buda limestone near Austin, while the task of determining the geologic relations of that formation and mapping its areal extent has been done by Mr. RT Hill. The author is, therefore, unable to speak regarding the geology of the Buda limestone, except as that information has been published. The following statement is consequently derived entirely from the description by Mr. Hill, given in the Twenty-first Annual Report of the United States Geological Survey....
Seite 30 - The specimen is 19 mm. high; the broken base has a greater diameter of 8 mm.; the greater diameter of the calice is about 15.5 mm., and the lesser 10 mm. or slightly more. The corallum is very nearly straight; the calice is apparently inclined to the vertical axis, the shorter transverse axis not lying in a horizontal plane. Wall, solid; costse well developed, corresponding to all septa, regularly alternating in size. The larger costse are tall, narrow, and thin, with sharp edges. Over the costse...
Seite 7 - Events in North American Cretaceous history illustrated in the ArkansasTexas division of the southwestern region of the United States : Am. Jour.