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The AAPG/Datapages Combined Publications Database

Showing 26,126 Results. Searched 200,619 documents.

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Effect of Climate and Source Area Location on Browns Park Formation Petrology: ABSTRACT

Wayne A. Chisholm

AAPG Bulletin

.... Abundant plutonic and volcanic rock material show that the sandstones are largerly first cycle sediments. The quartz, feldspar, volcanic rock...

1963

Geology of a Portion of the Contwoyto Lake Area, Northwest Territories: ABSTRACT

Alden B. Carpenter

AAPG Bulletin

... of the central part of Contwoyto Lake, N.W.T. The oldest rock unit is apparently a quartz-plagioclase-biotite-K-feldspar paragneiss containing numerous...

1964

Defining a Gradient in a Sample of Sedimentary Rock: ABSTRACT

E. C. Dahlberg

AAPG Bulletin

... with confidence limits which expose graphically the trends displayed by individual constituents indicate that feldspar proportion, mica proportion, and quartz...

1965

Stratigraphy and Oil Possibilities of Mesozoic Rocks in Kandik Basin, East-Central Alaska: ABSTRACT

Earl E. Brabb

AAPG Bulletin

... Limestone of Permian age. It consists mainly of carbonaceous argillite but includes some limestone, oil shale, and quartz arenite. This unit is about...

1965

Character, Origin, and Significance of Late Silurian Barrier Island--Fuyk Sandstone Member of Rondout Formation, Hudson Valley, Eastern New York State: ABSTRACT

John D. Harper

AAPG Bulletin

... of section. The second transgressive episode was characterized by the development of a quartz sandstone barrier island-dolomite lagoon complex near...

1968

Postmortem History of a Permian Pelecypod Assemblage from Wyoming: ABSTRACT

Donald W. Boyd, Norman D. Newell

AAPG Bulletin

.... At that time burrowers penetrated the bottom and introduced younger quartz sand and fine shell debris into the substrate and into some of the shallowest molds...

1969

Stratigraphy of Beaufort Formation along Western Margin of Canadian Arctic Islands: ABSTRACT

Len V. Hills

AAPG Bulletin

... the upper or lower unit. Mineralogically, the lowest unit is composed of about 70% quartz, 25% chert, and 5% others (shale chips predominantly...

1970

Upper Jurassic and Basal Cretaceous Sandstones of Southern Saskatchewan and Vicinity: ABSTRACT

J. E. Christopher

AAPG Bulletin

... migrating northern delta. The Cantuar Formation (Aptian to Albian) comprises (a) white to light-gray quartz-kaolin (feldspathic) arenites; (b) olive...

1971

Calcite Rims, Little Falls Formation, Upper Cambrian, New York: A Dedolomitization Fabric?: ABSTRACT

D. H. Zenger

AAPG Bulletin

... and the calcitic border, the latter commonly being very slightly ferroan. Dolomite preceded development of quartz overgrowths, as determined by spatial...

1972

Petrology and Diagenesis of Tertiary Aquifer Carbonates, North Carolina: ABSTRACT

P. A. Thayer, D. A. Textoris

AAPG Bulletin

... biosparite and biosparrudite, which grades westward into calcareous quartz sand. Facies A consists of unabraded pelecypod valves (dominantly molds...

1972

Paragenetic and Stability Relations Among Authigenic Minerals--Indicators of Pore-Fluid Geochemistry: ABSTRACT

I. Edgar Odom

AAPG Bulletin

...-feldspar with some quartz, (2) illite-smectite-chlorite, sometimes with calcite or dolomite, (3) quartz (overgrowths), (4) pyrite, and (5) kaolinite...

1979

Deduction of Past Geothermal Gradients in Neogene Siliceous Rocks in Circum-Pacific Region: ABSTRACT

Kenneth A. Pisciotto

AAPG Bulletin

... and mineralogic progression: diatomite (opal-A) ^rarr chert and porcelanite (opal-CT) ^rarr chert and porcelanite (quartz). Temperature...

1979

Origin of Porosity in Deep Woodbine-Tuscaloosa Trend, Louisiana: ABSTRACT

Alan Thomson

AAPG Bulletin

... which are arranged edgewise, one crystal thick, on grain surfaces. Sandstones with more or less continuous chlorite coatings around quartz grains...

1979

Effects of Physical and Chemical Diagenesis on Low-Porosity, Low-Permeability Sandstones, Mesaverde Group, Uinta Basin, Utah: ABSTRACT

C. W. Keighin

AAPG Bulletin

.... The sandstones are predominantly feldspathic litharenites composed of monocrystalline and polycrystalline quartz, igneous, metamorphic, and fine-grained...

1981

Peralkaline Ash-Flow Tuffs in Santa Clara Canyon, North of Chihuahua City, Mexico, Possible Source Rocks for Uranium: ABSTRACT

Richard D. Dayvault

AAPG Bulletin

... sanidine (Or 45-55) quartz, hedenbergite, and magnetite. A complete cooling unit consists of: (1) a basal vitrophyre with associated spherulitic pods; (2...

1981

Jurassic Subcrop and Its Effect on Sedimentation, West-Central Alberta: ABSTRACT

Don Marion

AAPG Bulletin

... and ridge system. To the west, successively younger units subcrop at the Pre-Cretaceous surface. As a result, unconformity bounded Jurassic quartz...

1982

Copper Deposits--Frieda River Prospect, Papua New Guinea: ABSTRACT

Drew D. Henry

AAPG Bulletin

.... Extensive hydrothermal alteration has given rise to a widespread assemblage, consisting of quartz, alunite, kaolinite, pyrite, and locally, native sulfur...

1982

Depositional Environments of Silurian Whirlpool Sandstone (Medina) in Western New York: ABSTRACT

Beverly Seyler

AAPG Bulletin

... and signified only by an abrupt influx of clean quartz sand. Petrographic analysis shows that the Whirlpool is a second or multicycle sandstone composed...

1982

Oxygen Isotopic Studies of Diagenetic Clay Minerals: Implications for Geothermometry, Diagenetic Reaction Mechanisms, and Fluid Migration: ABSTRACT

Samuel M. Savin

AAPG Bulletin

... transition is quartz. When the diagenetically formed quartz can be isolated for isotopic analysis, oxygen isotope fractionations between coexisting...

1982

Petrologic Variation in Pliocene to Quaternary Gravels of Southeastern Louisiana: ABSTRACT

Robert P. Self

AAPG Bulletin

... analyses and chert-to-quartz ratios were studied on Pliocene and Quaternary gravel fractions from the Florida parishes of southeastern Louisiana...

1983

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