Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 27 February 2020
Journal of Sedimentary Research (2020) 90 (2): 228–249.
...Ariely L. Rigueti; Patrick Führ Dal' Bó; Leonardo Borghi; Marcelo Mendes ABSTRACT Coquinas constitute widespread deposits in lacustrine, estuarine, and shallow marine settings, where they are a valuable source of information on environmental conditions. Thick coquina successions were deposited...
FIGURES | View All (12)
Journal Article
Journal: Interpretation
Published: 12 August 2019
Interpretation (2019) 7 (4): SH19–SH31.
... fans related to fault scarps), the Morro do Chaves Fm. (coquinas), the Coqueiro Seco Fm. (fluvial-deltaic sands and conglomerates, lacustrine shales and halite of the Horizonte evaporites), the Ponta Verde Fm. (lacustrine shales), and the Maceió Fm. (lacustrine gravitational flux deposits, alluvial...
FIGURES | View All (14)
Journal Article
Journal: Geophysics
Published: 21 December 2018
Geophysics (2019) 84 (1): MR45–MR59.
... a large variation of sedimentary texture. Samples can be grouped into four texture association based on their composition and structures. (1) Bioclastic grainstone (coquinas) are characterized by an intense calcite cementation, with a nonnegligible overprint of chalcedony (the silicified spots are always...
FIGURES | View All (15)
Journal Article
Journal: AAPG Bulletin
Published: 01 July 2018
AAPG Bulletin (2018) 102 (7): 1343–1377.
... not be captured on thin sections. The uncertainty related to sample positioning was also significantly reduced by correcting the plug depth by using borehole images. In addition, the present approach does not consider possible effects of P- and S-wave anisotropy. Upper Barremian–lower Aptian coquinas...
FIGURES | View All (23)
Series: AAPG Memoir
Published: 01 January 2017
DOI: 10.1306/13572006M1133685
EISBN: 9781629812762
... (location in Figure 3 ). Observe the very clear mound geometry of the Itapema Formation (between yellow and blue horizons). Blue arrows correspond to progradational seismofacies of the coquinas, dipping southwest and northeast. The gamma ray log is green, the resistivity log is blue. (CGG Santos VI...
FIGURES | View All (14)
Journal Article
Published: 01 December 2016
Bulletin of Canadian Petroleum Geology (2016) 64 (4): 516–537.
... to integrate the well-log pattern observation in the regional framework described in previous works (e.g. Davies et al., 1997 ) in order to highlight the proximal-distal trend and thereby properly identify the sedimentary environments that have similar gamma-ray facies. Foreshore “Coquina” environment (A2...
FIGURES | View All (14)
Journal Article
Journal: AAPG Bulletin
Published: 01 July 2016
AAPG Bulletin (2016) 100 (7): 1135–1164.
... by the Loeme Salt. The upper synrift is generally limestone with widespread mollusk packstones and grainstones (coquinas) deposited in a fresh-to–moderately saline (alkaline) lake. The sag interval is characterized by carbonate platforms and silica-rich isolated buildups formed in highly evaporated, highly...
FIGURES | View All (17)
Journal Article
Published: 01 June 2016
Journal of Sedimentary Research (2016) 86 (6): 734–748.
... Cretaceous coquina limestone, in which both optical and SEM-CL imaging produces a limited response from much of the sample. Backscattered electron (BSE) imaging typically suggests only a hint of the cement present, whereas CCI clearly displays a rich and varied cement stratigraphy. The earliest cement...
FIGURES | View All (16)
Journal Article
Journal: Interpretation
Published: 18 April 2016
Interpretation (2016) 4 (2): SE63–SE74.
...Paulo T. L. Menezes; Jandyr M. Travassos; Marco A. M. Medeiros; Patricia Takayama Abstract Barremian lacustrine carbonates, mainly coquinas, are the reservoir rocks of the large presalt petroleum discoveries in deep to ultradeepwaters, at the southeast Brazilian margin, namely, the Santos, Campos...
FIGURES | View All (10)
Journal Article
Published: 12 April 2016
Petroleum Geoscience (2016) 22 (2): 105–122.
...Patrick W. M. Corbett; Rayana Estrella; Andrea Morales Rodriguez; Ahmed Shoeir; Leonardo Borghi; Ana Carolina Tavares Abstract Coquinas are significant producing facies in the pre-salt reservoirs of Brazil and Angola. This paper describes an analogue model study to help understand the reservoir...
FIGURES | View All (27)
Published: 01 January 2014
DOI: 10.5724/gcs.14.33.0098
EISBN: 978-0-9836097-9-7
... transition time. Mapping of the “synrift” to “sag” transitional stratigraphy indicates a significant erosional unconformity at the base salt level across the outer Campos hinge in the southern Campos basin that results in the removal of the uppermost presalt section and portions of the underlying coquina...
Journal Article
Published: 01 August 2010
Vadose Zone Journal (2010) 9 (3): 653–661.
... be important for water and nutrient availability, especially for tree species, but they have not been investigated within an ecological context. We studied the capability of ground-penetrating radar (GPR) for identifying various limestone layers—the laja (0.3–2.5 m), the sascab (2.5–5 m), and the coquina (5–9...
FIGURES | View All (5)
Journal Article
Published: 01 June 2010
Bulletin of Canadian Petroleum Geology (2010) 58 (2): 115–140.
... The lower Triassic Montney Formation is a complex accumulation of shale, siltstone, sandstone and bioclastic packstone/grain-stone (coquina) and records deposition in offshore to shoreface depositional settings on the western margin of Pangaea. The Montney Formation is an important hydrocarbon reservoir...
FIGURES | View All (12)
Journal Article
Published: 01 November 2008
Bulletin de la Société Géologique de France (2008) 179 (6): 569–581.
...; and (ii) several single-event mass-mortality horizons associated with dacitic pyroclastic flows responsible for the preservation of high-diverse allochthonous coquinas. Our knowledge of the biodiversity patterns achieved by the benthic communities preserved in the poorly fossiliferous, siliciclastic...
FIGURES | View All (6)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2008.2437(11)
... with its lumpy, boudined appearance. It appears as fill within scours carved into the Owl Creek clay. The coquina includes large fossils, some exceeding 6 cm in length, and many rounded to oblate rip-up clasts. Some clasts are more than 10 cm long and 5 cm thick. The clasts are particularly interesting...
FIGURES | View All (10)
Journal Article
Published: 01 December 2004
South African Journal of Geology (2004) 107 (4): 619–632.
... is recorded by a coquina bed deposited on a wave cut terrace, similar to other marine terraces preserved along the west and east coasts of southern Africa. © 2004 Geological Society of South Africa 2004 Upper Cenozoic coastal deposits preserved along the west coast of southern Africa occur...
FIGURES | View All (13)
Journal Article
Journal: AAPG Bulletin
Published: 01 January 2003
AAPG Bulletin (2003) 87 (1): 39–70.
... shell beds (coquinas) are also characteristic ( Figure 5 ). Figure 5 ( a ) Graded coquinas (facies 2). Interval contains shells and centimeter-scale intraclasts, which consist of intensely bioturbated calci-mudstones. Such reworking horizons, commonly intercalated with shell bed, typically occur...
FIGURES | View All (20)
Journal Article
Journal: GSA Bulletin
Published: 01 October 2001
GSA Bulletin (2001) 113 (10): 1249–1271.
... of a collisional marine foreland basin. We have recognized several scales of stratigraphic packages and unconformities in deposits of the Taiwan foreland basin. Small-scale (20 to 150 m thick) stratigraphic sequences contain upward-shallowing, marine lithofacies successions that are bracketed by thin coquina...
FIGURES | View All (20)
Journal Article
Published: 01 December 2000
Bulletin of Canadian Petroleum Geology (2000) 48 (4): 339–359.
... is developed in the coquina facies at the West Stoddart and Cache Creek fields. Average porosity ranges from 6.5–9.4% for the sandsone lithofacies and 4.9–8.6% for the coquina lithofacies. Pore-occluding cements are mainly calcite in the northwestern, and dolomite and anhydrite in the southeastern, reservoirs...
FIGURES | View All (17)
Journal Article
Published: 01 March 2000
Geological Magazine (2000) 137 (2): 193–205.
...JONATHAN D. RADLEY; MICHAEL J. BARKER Abstract Thin bioclastic limestone beds (‘coquinas’) in the Vectis Formation (Wealden Group, Lower Cretaceous) of the Isle of Wight, southern England, exhibit a range of biofabrics and internal stratigraphies. These features are attributed to both simple...
FIGURES | View All (7)