..., however, that vital effects can exert a greater control than paleotemperature over fossil Sr/Ca. Seasonal perturbations in isotopic data from the Eocene bivalve Venericardia planicosta reveal a gradually decreasing annual growth rate through ontogeny. High-resolution Sr/Ca ratios, analyzed with a new...

... of high-resolution drilling techniques in Nummulites , we show that both N. laevigatus and coeval bivalve Venericardia planicosta from the Lutetian of Hampshire, United Kingdom (ca. 50–42.5 Ma), underwent strong, annual alternations in carbon and oxygen isotopes, possibly reflecting tolerance of broad...

... appearance of Venericardia planicosta in the Negritos formation as evidence of its lower Eocene age. This is correct in the old usage of the term lower Eocene, which included the Paleocene. In the same paper (p. 73) Calytrophorus ( Aulacodiscus ) lissoni , a common and characteristic mollusk...

... the following species at various localities. Modiola subinflala Whitfield (Weller, 1907) Aturoidea patwifex Cope, near Glassboro (Weller, 1907) Venericardia smithii Aldrich, Birmingham, (Cooke and Stephenson, 1928)   Venericardia planicosta var. regia from Birmingham, N. J...

..., morphologically diverse specimens were discovered on the U.S. Coastal Plain, but were generally classified according to sharp-ribbed or smooth-ribbed external ornamentation as either Venericardia alticosta or Venericardia planicosta , respectively (Heaslip, 1968 ). In 1930, Stewart proposed...

... of France and Denmark. 5. Genera and subgenera restricted to the Paleocene and Eocene. Calorhadia and the subgenus Litorhadia are foreshadowed in the Paleocene but are particularly characteristic of the Eocene of the Gulf province; Venericor is typified by Venericardia planicosta...

... in Bosworth’s Geology and Paleontology of Northwest Peru . It is specially characterized by several species of large Turritella , varietal forms of Venericardia planicosta, Leda ingens Woods, and a curious Calyptraphorus type of gastropod described by Douville as Aulacodiscus lessonii . The Negritos...

..., Petróleos Mexicanos, Archivo Tècnico NEM- 1005 , 127 p. Gardner , J. A. , E. , and Bowles , 1939 , The Venericardia planicosta group in the Gulf Province : U. S. Geological Survey Professional Paper , 189 -F. 143 – 215 . Giles , K. A. , T. F. , and Lawton , 1999...

... have been found in the Yegua along our line of section. Well-preserved forms are not abundant, but such as were found are frequent from the bottom to the top of this division. Venericardia planicosta , Ostrea alabamensis , and Leda sp. are most common. Fossil wood is found throughout the Yegua...

... the bivalve Venericardia planicosta and the larger benthic foraminiferan Nummulites laevigatus of the middle Eocene Hampshire Basin in the United Kingdom that are as negative as samples from the Alabama Venericardia. Pearson et al. (2001) also report δ 18 O values from exceptionally well-preserved...

... , The Midway Group of Texas : The University of Texas Bulletin , v. 3301 , p. 1 – 402 . Gardner J. , and Bowles E. , 1939 , The Venericardia planicosta Group in the Gulf Province : United States Geological Survey Professional Paper , v. 189–F , p. 143 – 215 . Gerth H...

... is preserved, are marine fossils found here and there. Thus Liddle records the typical Venericor ( Venericardia ) planicosta from a locality near Urica in Anzoategui. The writer has also found in this general vicinity, material with shell fragments and a few casts that suggest members of the Carditidae...

... of the pelecypod Venericardia planicosta Lamarck and the gastropod Turritella turneri Plummer, but these two are abundant in some layers. Weathering has changed nearly all the glauconite to limonite and thereby changed the original color of the rock to red and orange colors, has indurated some of the layers...

... macrospondylus ( Basilosaurus cetoides of later reports), Venericardia planicosta, Mitra millingtoni, Umbrella planulata, Flabellum wailesi , and others. In the text (pp. 128–38) these strata are discussed under the heading “Jackson Group,” rather than “Jackson Stage,” as given in the table...

... Lacinia alveata Conrad Turritella sp. Venericardia planicosta (Lamarck) Pteropsis lapidosa Conrad Ostrea alabamiensis Conrad Corbula deusseni Gardner Volutocorbis petrosa Conrad Comnlina armigera Conrad According to Trowbridge, the thickness of the Cook Mountain in Webb...

... a total cumulative production of 29,119,000 barrels. Of the 147 wells drilled, 141 had been completed as producers. Venericardia planicosta Liddle, 1928 , “The Geology of Venezuela and Trinidad,” pp. 183-86. Not Lamarck, 1806, Middle Eocene of France. Venericardia parinensis Rutsch...

... and Hanna, 35 and the giant venericards of the Venericardia planicosta gens. Important forms making their first appearance in the upper Refugian are Dosinia mathewsonii (Gabb), 36 Pecten ( Lypropecten ) perrini Arnold, 37 Nodosaria anomala Reuss, 38 and Cassidulina, sensu stricto...

... Kenntnis tropisch-amerikanischer Tertiar-mollusken. IV. Die Stratigraphische Bedeutung der Venericardia Planicosta und ihrer Verwandten. V. Ist Venericardia Beaumonti auf die Oberkreide beschrankt? ” Eclog. Geol. Helv. , Vol. 29 , No. 1 ( 1936 ), pp. 151 - 207 . 14. RUTSCH R...

.... W. , “ Subsurface Pleistocene of Louisiana ,” Louisiana Dept. Cons. Geol. Bull . 19 ( 1941 ), pp. 369 – 419 . GARDNER , JULIA , AND BOWLES , E. O. , “ The Venericardia planicosta Group in the Gulf Province ,” U. S. Geol. Survey Prof. Paper 189 ( 1939 ), pp. 143 – 215...

... vegetation consists typically of mesquite, post oak and blackjack being relatively scarce. Two easily recognized fossils are prominent in the fauna of these beds— Venericardia planicosta? and Ostrea tasex? The writer has found no pure limestone nor Foraminifera and petrified wood is apparently absent...