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The AAPG/Datapages Combined Publications Database
Showing 639 Results. Searched 200,357 documents.
TRACE FOSSILS AND GLAUCONITIC PELLETS PROVIDE INSIGHT INTO CAMBRIAN SILICICLASTIC MARINE ENVIRONMENTS
SHERIE C. HARDING, A.A. EKDALE
PALAIOS
...), are phosphatic lingulid brachiopod shell debris, which also was reported by previous workers (McBride 1988). These were observed as slender, tapered...
2018
An overview of hymenopteran cocoons as a tool to interpret ichnospecies of Fictovichnus (Pallichnidae) and other fossil cocoons of wasps
Laura C. Sarzetti, Jorge F. Genise, Pablo Dinghi, M. Alejandra Molina
PALAIOS
... in a stouter shape, or may be more tapered, resulting in a fusiform shape (Fig. 1A, 1B). Ovoid: the equatorial diameter is the largest and one distal...
2019
Distinguishing regurgitalites and coprolites: a case study using a Triassic bromalite with soft tissue of the pseudosuchian archosaur Revueltosaurus
Caleb M. Gordon, Brian T. Roach, William G. Parker, Derek E.G. Briggs
PALAIOS
... structures such as spheres, bullets, tripartite whorls, rounded cones, or tapered cylinders (Chin et al. 2003; Hollocher et al. 2005; Hunt et al. 2007...
2020
Evaluating compositional fidelity and sources of mortality of shoreline fish carcasses in a freshwater lake community in western Canada
T. E. Reimchen
PALAIOS
... are robust at the base and tapered towards the tip and I measured position of the fracture along the spine as a major break: 0–30% from base of spine...
2021
Significance of a Small Regurgitalite Containing Lissamphibian Bones, from the Morrison Formation (Upper Jurassic), within a Diverse Plant Locality Deposit in Southeastern Utah, USA
John R. Foster, Adrian P. Hunt, James I. Kirkland
PALAIOS
... is. One bone impression appears to have a tapered boomerang shape and small size and may represent a frog squamosal. The possible frog ilia range from 1.4...
2022
Unconventional Reservoir Model Predictions Using Massively-Parallel GPU Flow-Simulation: Part-1 Bakken Reservoir Characterization Choices and Parameter Testing
Mike Uland, James Gilman, Omar Angola, Reinaldo Michelena, Hai Zui Meng, Ken Esler, Karthik Mukundakrishnan, Vince Natoli
Unconventional Resources Technology Conference (URTEC)
... the same HF half-length of 220 ft, however the fracture conductivity has a tapered reduction with length and height resulting in average conductivity of 80...
2015
Guadalupian Depositional Cycles of The Delaware Basin and Northwest Shelf1
Alonzo D. Jacka, Carroll M. Thomas, Ray H. Beck, Karl W. Williams, Stanley C. Harrison
West Texas Geological Society
... and platforms. Off submarine canyon mouths deep-sea fans coalesced to form a compound submarine apron or bajada which tapered basinward. Sediment...
1972
Sequestrichnia in complex Ophiomorpha isp. from Late Pleistocene grainstones in the Bahamas, with modern analogue comparisons
H. Allen Curran, Koji Seike, Bosiljka Glumac
PALAIOS
... equal length arms that are about 180° apart, directed very gently downward, and with slightly tapered, blunt ends. A short tunnel connects at right angles...
2025
Miospores, Zonation and Correlation of Upper Devonian Sequences from Western New York State and Pennsylvania
J. B. Richardson, S. Ahmed
CSPG Special Publications
... in correlation (Fig. 4, events 4 & 5). Firstly, variants of the V. pusillites morphon appear (including some with large evely tapered spines, others...
1988
Organic geochemistry of the Middle to Upper Jurassic source rocks succession in Balad-1 Well, Balad Oil Field, Central Iraq
Fawzi M. O. Albeyati, Rzger A. Abdula, Rushdy S. Othman
Geological Society of Malaysia (GSM)
... anticlines which are parted by tapered synclines (McQuarrie, 2004). The study areas’ general stratigraphy is summarized in two megasequences...
2021
Gramp's Field, Archuleta County, Colorado
W. A. Waldschmidt
AAPG Special Volumes
... sand in which the grains are small and angular. Grains of glauconite, and small, amber-colored, tapered Inoceramus prisms are characteristic...
1948
Physical Characterization of the Weathering Profile Over a Sheared, Biotite-Muscovite Granite in Peninsular Malaysia
John Kuna Raj
Geological Society of Malaysia (GSM)
... the samples; the tubes having a constant wall thickness of 0.3 cm except at one end where the lower half tapered to 0.15 cm thick to provide...
2023
Geochemistry and Mineralogy of Prehistoric Pottery Shards Found at Gua Kelew, Nenggiri Valley, Kelantan, Malaysia
Muhamad Shafiq Mohd Ali, Zuliskandar Ramli, Nur Farriehah Azizan
Geological Society of Malaysia (GSM)
..., chopping and hunting (Wan Noor Shamimi et al., 2018). Axes were produced in different shapes and sizes with tapered sides to suit their function...
2023
Mineral Analysis of Sediments
F. J. Pettijohn
Special Publications of SEPM
.... To overcome this obstacle, Berg () devised a pipette (Fig. 2) consisting of (i) a small glass tube (D) i6 millimeters long with a 2 millimeter bore but tapered...
1955
Oil and Gas Developments in Western Canada in 1985
D.C. Robertson
CSPG Bulletin
... region yielded a major gas find at Cape Allison, as drilling activity tapered off by 6% during 1985. Delineation of last year's Cretaceous gas...
1986
Marine Oil Shale, Source of Oil in Playa Del Rey Field, California
Harold W. Hoots , A. L. Blount , P. H. Jones
AAPG Bulletin
... sections. The first type has the shape of rather short irregular lenses tapered much more abruptly toward one end than the other. These appear...
1935
Raguba Field--Libya Sirte Basin
Philip Brennan
AAPG Special Volumes
... of "Raguba clastics" tapered gradually up the southwest flank against the rising surface of the underlying quartzitic sandstones had been demonstrated...
1992
Reservoir Geometry Influenced by High-Frequency Forced Regressions Within an Overall Transgression: Caroline and Garrington Fields, Viking Formation (Lower Cretaceous), Alberta
Stephen D. Davies,, Roger G. Walker
CSPG Bulletin
... their points of convergence. It is clear in both maps that E2 and E3 are prominent at Caroline but have tapered out in the Garrington area. In both E2 and E3...
1993
Large-Scale Duplex Structures in the McConnell Thrust Sheet, Rocky Mountains, Southwest Alberta
M.E. McMechan
CSPG Bulletin
... for duplex formation where the duplex is seen as a tapered wedge of material derived from the footwall and enclosed within active floor and roof thrusts...
2001
A Statistical Approach to Understanding Fluid Geochemistry Changes in Unconventional Plays
Craig D. Barrie, Catherine M. Donohue, J. Alex Zumberge
Unconventional Resources Technology Conference (URTEC)
... A/Bone Spring 2 oil in the first round was correct and over the 6 month period between sampling rounds the Wolfcamp A signature in this well has tapered...
2020
Recognition and sources of secondary biogenic gases in the oil sand areas, Western Canada Sedimentary Basin
Haiping Huang
CSPG Bulletin
... resource evaluation in other basins. Geological Background The WCSB with an area of 1 400 000 km2 consists of a massive, tapered wedge...
2015
Nature, Origin, and Significance of Cone-in-cone Structures in the Kiowa Formation (Early Cretaceous), North-Central Kansas
Paul C. Franks
Journal of Sedimentary Research (SEPM)
... with apices pointed toward shale cores of the concretions. The cone-in-cone weathers along curved clay-coated surfaces to yield elongate, tapered, curved...
1969
Chapter 12: Reappraisal of the Tectonic Style of the Talara-Tumbes Forearc Basin: Regional Insights for Hydrocarbon Exploration
Stéphane Brusset, Jean-Claude Soula, Martin Roddaz, Gérôme Calvès, Nicolas Espurt, Mayssa Vega, Patrice Baby, Ysabel Calderon
AAPG Special Volumes
... subsidence recorded by deepening of the frontal depocenters. The critically tapered wedge models involving a horizontal push combined with gravity...
2018
Introduction to Thrust Fault-related Folding
Ken McClay
AAPG Special Volumes
... within them. The analog models of fold and thrust belts form critically tapered Coulomb wedges (e.g., Davis et al., 1983). Within these wedges...
2011
Introduction to Offshore Geologic Hazards: Section 1: PART 1
Arnold H. Bouma
AAPG Special Volumes
... often design a tapered section at the waterline for the outer breasting platform piles and the mooring dolphin piles to provide less resistance to flow...
1981