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Corbula

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Figure 2. Morphologic disparity in freshwater Corbulidae. A–D, Corbula sulcata, Recent, west Saharan Africa, type species of Corbula provided as an exemplar of marine Corbulidae; A, B, Left valve, length  =  25 mm, ×2.7, ×1.3, respectively; C, D, Right valve, length  =  26.3 mm, ×2.2, ×1.1, respectively. E, I, J, Pachydon erectus, Miocene, Pebas Formation, Peru; E, Articulated valves, width (both valves)  =  36 mm, ×0.8; I, J,: Left valve, length  =  20.3 mm, ×0.9. F–H, Pachydon obliquus, Miocene, Pebas Formation; F, Left valve, length  =  13 mm, ×2.5; G, Left valve, length  =  11.5 mm, ×2.6; H, Articulated valves, length  =  11.7 mm, ×2.6. K, P, Ostomya myiformis, Miocene, Pebas Formation, left valve, length  =  22.9 mm, ×1.5. L, Q, Pachydon telliniformis, Miocene, Pebas Formation; L, Articulated valves, length  =  15 mm, ×2; Q, Right valve, length  =  10.2 mm, ×3.3. M, N, R, Concentricavalva concentrica, Miocene, Pebas Formation; M, Right valve hinge, length  =  7.7 mm, ×3.1; N, Left valve hinge, length  =  8.9 mm, ×3.4; R, Left valve (internal view), length  =  15.8 mm, ×2.1. O, S, T, Exallocorbula dispar, Miocene, Pebas Formation; O, Right valve, length  =  13.1 mm, ×2.7; S, Articulated valves, length  =  13 mm, ×2.6; T, Left valve, length  =  14.1 mm, ×2.6. U, Anticorbula sinuosum, Recent, Suriname, articulated specimen in wood, bivalve length ∼ 28 mm; ∼×1.
Published: 01 November 2010
Figure 2. Morphologic disparity in freshwater Corbulidae. A–D, Corbula sulcata , Recent, west Saharan Africa, type species of Corbula provided as an exemplar of marine Corbulidae; A, B, Left valve, length  =  25 mm, ×2.7, ×1.3, respectively; C, D, Right valve, length  =  26.3 mm, ×2.2, ×1.1
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Photomosaic of the cliff face at Corbula Gulch (Corbeanu et al., in press). This is the part of the south-facing cliff in Figure 2. CG9 and CG8 are measured sections. Surface A is the base of element 1 (flood-plain muds and coals lie beneath surface A). Surface B is the interface between elements 1 and 2. Surface C is the interface between elements 2 and 4. The clinoforms present in element 2 are examined in this study.
Published: 01 December 2003
Figure 5 Photomosaic of the cliff face at Corbula Gulch ( Corbeanu et al., in press ). This is the part of the south-facing cliff in Figure 2 . CG9 and CG8 are measured sections. Surface A is the base of element 1 (flood-plain muds and coals lie beneath surface A). Surface B is the interface
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Gridded accretion surfaces for point-bar deposits at Corbula Gulch. This model provides a framework to study shale occurrence for flow simulation.
Published: 01 December 2003
Figure 8 Gridded accretion surfaces for point-bar deposits at Corbula Gulch. This model provides a framework to study shale occurrence for flow simulation.
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Outline of ground-penetrating radar lines location at Corbula Gulch (Novakovic et al., 2002, reprinted with permission of Mathematical Geology). Wells 3, 4, and 5 are boreholes through the subject section. Well 6 is about 50 ft (15.24 m) north to this grid. CG4, CG7, CG8, and CG9 are pseudoholes. The adjacent cliffs are shown as a dotted line. Grids A and B were examined by Novakovic et al. (2002). This study focuses on the 10 × 10 line 2-D grid. Grid lines are 10 m apart (Corbeanu, 2001).
Published: 01 December 2003
Figure 2 Outline of ground-penetrating radar lines location at Corbula Gulch ( Novakovic et al., 2002 , reprinted with permission of Mathematical Geology ). Wells 3, 4, and 5 are boreholes through the subject section. Well 6 is about 50 ft (15.24 m) north to this grid. CG4, CG7, CG8, and CG9
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Location of Corbula Gulch study site. The San Rafael swell is to the southwest of the Book Cliffs exposures (Novakovic et al., 2002, reprinted with permission of Mathematical Geology). The cross section XY is shown in Figure 3.
Published: 01 December 2003
Figure 1 Location of Corbula Gulch study site. The San Rafael swell is to the southwest of the Book Cliffs exposures ( Novakovic et al., 2002 , reprinted with permission of Mathematical Geology ). The cross section XY is shown in Figure 3 .
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Location of the field site at Corbula Gulch, Utah.
Published: 01 January 2002
F IG . 1. Location of the field site at Corbula Gulch, Utah.
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A portion of the cliff face outcrop at Corbula Gulch, showing the main bounding surfaces (red lines) and internal structures. Unit 2 contains a set of dipping lateral accretions (green lines) that were the main target of the study. Unit 3 is not shown.
Published: 01 January 2002
F IG . 2. A portion of the cliff face outcrop at Corbula Gulch, showing the main bounding surfaces (red lines) and internal structures. Unit 2 contains a set of dipping lateral accretions (green lines) that were the main target of the study. Unit 3 is not shown.
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(a) Photo mosaic of Corbula Gulch outcrop, looking northeast, showing sedimentological bounding surfaces, and location of measured stratigraphic sections. A large delta plain channel containing inclined bedding cuts into the east side of the outcrop. (b) Data points of the bounding surfaces shown in Figure 4a mapped with a Laser Atlanta range finder. Individual points are in 3-D UTM coordinates. The points were projected onto an x-z plane in order to compare visually with the outcrop photo. (c) 3-D perspective of various bounding surfaces, fitted to the laser mapping and corehole data points and interpolated across the conjoining cliff faces. These surfaces will be used to develop a quantitative volume for reservoir flow-simulation studies.
Published: 01 February 2000
Figure 4. (a) Photo mosaic of Corbula Gulch outcrop, looking northeast, showing sedimentological bounding surfaces, and location of measured stratigraphic sections. A large delta plain channel containing inclined bedding cuts into the east side of the outcrop. (b) Data points of the bounding
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—Occurrence of Corbula swiftiana (number of valves per 300 grams).
Published: 01 October 1964
Fig. 11. —Occurrence of Corbula swiftiana (number of valves per 300 grams).
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Anomalocardia brasiliana-Corbula swiftiana Subassemblage (selected species)
Published: 01 October 1964
PLATE I. Anomalocardia brasiliana-Corbula swiftiana Subassemblage (selected species) F ig . 1.— Cerithidea costata (da Costa, 1778), ×2.0 F ig . 2.— Hydrobia cf. H. minuta (Totten, 1834), ×3.0 F ig . 3.— Alabina sp., ×3.0 F ig . 4.— Caecum pulchellum Stimpson , 1851, ×7.0 F ig . 5
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—Anomalocardia brasiliana-Corbula swiftiana Subassemblage related to salinity.
Published: 01 October 1964
Fig. 12. — Anomalocardia brasiliana-Corbula swiftiana Subassemblage related to salinity.
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—Anomalocardia brasiliana-Corbula swiftiana Subassemblage related to sorting.
Published: 01 October 1964
Fig. 13. — Anomalocardia brasiliana-Corbula swiftiana Subassemblage related to sorting.
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1969
AAPG Bulletin (1969) 53 (3): 744.
..., low-relief shelf. This distinctive rock sequence includes the following deposits in ascending order: (1) stromatolitic and rippled beds of probable intertidal origin, (2) very fossiliferous burrowed calcareous mudstone ( Salenia texana beds), (3) an iron-stained Corbula martinae bed, and (4) collapse...
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Published: 16 August 2018
Table 1. Rank correlations, partial rank correlations, and generalized least-square (GLS) slope estimates of the effects of total organic carbon (TOC) and dissolved oxygen concentrations on raw and unmixed abundance of Corbula gibba in sediments that were largely deposited during the twentieth
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EXPLANATION OF PLATE 3
Published: 01 October 1931
. 7.— Corbula subtrigonalis M. & H., showing variation in shape. Fig. 8. and Fig. 9.— Corbula perundata M. & H. Fig. 10.— Melania wyomingensis White. Fig. 11.— Melania whiteavesi Stanton. Fig. 12.— Ostrea glabra M. & H. A form typical of Foxhill sandstone. Fig. 13.— Corbula
Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.87.0181
EISBN: 9781565762954
... separated at the top of the regionally persistent “Corbula” Marker, and a boundary stratotype section is designated. The age of the Glen Rose Formation ranges from latest Aptian to near the end of the Early Albian, from approximately 113.3 Ma to 108.0Ma, and encompasses four ammonite zones. Three local...
Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.87.0193
EISBN: 9781565762954
... to be extensive. The exception is the “Corbula” interval, which we interpret to occur in the lower highstand of a high-frequencysequence. The correlation of the “Corbula” interval has been based in part on the succession of the underlying Salenia Interval to theoverlying solution-collapse interval. We...
Journal Article
Journal: AAPG Bulletin
Published: 01 April 1981
AAPG Bulletin (1981) 65 (4): 766.
...-sediment deformation. The laminated carbonates are dark-gray, with some bedded, black chert and contain gastropods, oysters, and the bivalve Corbula . Massive units are generally dark-gray to tan, with chert nodules and stylolites, and contain rudists, oysters, corals, and gastropods. The silicified...
Journal Article
Published: 01 July 2011
Jour. Geol. Soc. India (2011) 78 (1): 81–91.
... (Venericardia) dufrenoyie  (d’Archiac and Haime) var. paucicostata  n.var., Vepricardium (Hadecardium) sharpei  d’ Archiac and Haime, Corbula (Bicorbula) harpa  d’Archiac and Haime, Corbula (Bicorbula) samanaensis  Cox. Corbula  ( Bicorbula ) praexarata  Cox, Corbula  ( Bicorbula ) cf. pseudorakhiensis...
FIGURES
First thumbnail for: Molluscan Assemblage from the Marine Palaeocene Se...
Second thumbnail for: Molluscan Assemblage from the Marine Palaeocene Se...
Journal Article
Journal: Paleobiology
Published: 16 August 2018
Paleobiology (2018) 44 (4): 575–602.
...Table 1. Rank correlations, partial rank correlations, and generalized least-square (GLS) slope estimates of the effects of total organic carbon (TOC) and dissolved oxygen concentrations on raw and unmixed abundance of Corbula gibba in sediments that were largely deposited during the twentieth...
FIGURES
First thumbnail for: Tracing the effects of eutrophication on molluscan...
Second thumbnail for: Tracing the effects of eutrophication on molluscan...
Third thumbnail for: Tracing the effects of eutrophication on molluscan...