Colorado Shale of Central and Northwestern Montana and Equivalent Rocks of Black Hills

W. A. Cobban

AAPG Bulletin

... is overlain by 23 feet of white-weathering calcareous shale that contains at its base a prominent bed of closely spaced gray calcareous concretions...

Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and Discovery.com

... and the converted wave arrival from the base of the weathering layer. Receiver functions are commonly used in global seismology experiments to infer crustal...

Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and Discovery.com

... and the converted wave arrival from the base of the weathering layer. Receiver functions are commonly used in global seismology experiments to infer crustal...

Mineralogical and Physical Properties of Gulf Coast Limestone Soils

W. C. Isphording

GCAGS Transactions

...Mineralogical and Physical Properties of Gulf Coast Limestone Soils W. C. Isphording 1978 Vol. 28 (1978), The weathering of limestones in the Gulf...

Porosity Prediction in Sandstones Using Erosional Unconformities

G. Shanmugam

AAPG Special Volumes

... in dissolution of unstable framework grains and cements. The chemical weathering of sandstones is intensified in humid regions by the heavy rainfall, soil zones...

CLIMATO-TECTONIC EVOLUTION OF SILICICLASTIC SANDSTONES ON PUERTO RICO: FROM LITHIC ARENITES TO QUARTZ-ARENITIC SANDS IN AN OCEANIC ISLAND-ARC SETTING

David K. Larue, Kimberly Mendez Mendez, José L. Corchado Albelo, Lauryn N. Martinez, K. Stephen Hughes, Thomas Hudgins, Hernan Santos, Alan L. Smith, Chris Osterberg

Journal of Sedimentary Research (SEPM)

... elements in feldspars and lithic fragments are effectively removed by intense tropical weathering. Hence, future use of tectonic-affinity diagrams should...

Pre-eocene Paleosol South of Tijuana, Baja California, Mexico

Patrick L. Abbott, John A. Minch, Gary L. Peterson

Journal of Sedimentary Research (SEPM)

...), In the Rancho Delicias area south of Tijuana, Baja California, well preserved remnants of an ancient weathering profile are developed on mid-Cretaceous...

Significant Ammonite Finds in Uppermost Mancos Shale and Overlying Formations Between Barker Dome, New Mexico, and Grand Junction, Colorado

W. A. Cobban

Four Corners Geological Society

... in yellow-weathering limestone concretions 145 feet above the base of the Lewis near Barker dome in the NE sec. 6, T. 31 N., R. 13 W. (D4793). Poorly...

Soil Moisture Retention Characteristics of Saprock in a Weathering Profile over Rhyolite in Peninsular Malaysia

John Kuna Raj

Geological Society of Malaysia (GSM)

... are considered to be unsaturated soils for unconfined groundwater tables are only found towards the base of weathering profiles in the hilly...

ABSTRACT: Basement-Sandstone Interaction, Alteration Patterns in the Sandstone and Metal Sourcing, Athabasca Unconformity Uranium Deposits

V. Sopuck and Ken Wasyliuk

Saskatchewan Geological Society

..., are an appealing direct or indirect (into sandstone during weathering) metal source for uranium and other metals found in the deposits. These basement rocks...

The Morrissey and Mist Mountain Formations -- Newly Defined Lithostratigraphic Units of the Jura-Cretaceous Kootenay Group, Alberta and British Columbia

D. W. Gibson

CSPG Bulletin

...-grey weathering, very fine to coarse-grained sandstone up to 55 m thick. The Moose Mountain Member, with type locality at Moose Mountain, Alberta...

Stratigraphy and Structure of the Smoky Hill Chalk in Western Kansas

William L. Russell

AAPG Bulletin

.... The difficulties introduced by the effects of weathering and by the complicated structures are considered. The faulting in the Smoky Hill chalk probably occurred...

The Cretaceous-Tertiary Transition in Southwestern Alberta

E. T. Tozer

CSPG Special Publications

... of brackish-water fossils occurs which may be correlated with the Drumheller member which occurs 580 feet above the base in the Red Deer Valley (Allan...

Hummingbird and Whiterabbit Reef Margins (Frasnian), Alberta

A. S. Hedinger, R. H. Workum

CSPG Special Publications

... is overlain by 40 m of recessively weathering shale and nodular lime mudstone of the Cripple Tongue. Near the base this unit carries a rich bryozoan...

Glacial Deposits of the Lake Angeline Quadrangle Bighorn Mountains, Wyoming

Robert S. Nelson

Earth Science Bulletin (WGA)

... and morphology, east flank Bighorn Mountains Wyoming: Earth Science Bull., v. 1, No. 4, p. 19–24. Porter, S. C., 1975, Weathering rinds as relative-age...

Paleoclimatic Significance of Widespread Proterozoic Silcretes in the Bear and Churchill Provinces of the Northwestern Canadian Shield

Gerald M. Ross , Jeffrey R. Chiarenzelli

Journal of Sedimentary Research (SEPM)

... to Middle Proterozoic cratonic cover sequences in the northwest Canadian Shield. In the Thelon Basin, silcrete occurs as silicified lateritic weathering...

Rates of Weathering and Denudation with Reference to Uplift and Sedimentation

Bryan P. Ruxton

Papua New Guinea (PNG) Petroleum Convention Proceedings

... weathering is mainly towards the base o f the profile. For the em pir­ ical relationship (Table 2) the soil store in the whole profile is averaged and indeed...

Depositional and Diagenetic History of the Mississippian Chat, North Central Oklahoma [Abstract]

Suzanne M. Rogers

Oklahoma City Geological Society

... and weathering-in-place of Osagean Mississippian cherty limestone. Fossiliferous clasts found in Chat cores were likely eroded in a high energy environment...

Abstract: Recent bedrock geomorphology of the Niagara Escarpment, Niagara, Ontario

R. E. Stenson

Atlantic Geology

... of freeze/thaw and wet/dry weathering, all of which take advantage of a complex stratigraphy. Work performed along this section of the escarpment has resulted...

Abstract: Survey of Slope Failures for a Rural Road in Sarawak

Tan Boon Kong

Geological Society of Malaysia (GSM)

... lithology, grade of weathering and structures. The roadway traverses rocks of the Belaga Formation (Lower Tertiary) which comprises argillite, slate...

Progress Report on the Search for Early Devonian Gas in Northern West Virginia, with Comments on Pre-Devonian Oil Prospects: ABSTRACT

Frank Reeves, Paul H. Price

AAPG Bulletin

... of the nineteen deep wells drilled in the region have reached the base of the Silurian. O der Paleozoic formations have not been penetrated. It is believed...

Sedimentary Facies Model of Turbidites: ABSTRACT

Arnold H. Bouma

AAPG Bulletin

... the base of a layer is formed by one of the three lower intervals. The lower bedding planes of such layers are most readily exposed by weathering...

Abstract: Late Quaternary Coastal Units and Marine Cycles: Correlations Between Northern Gulf Sectors, by E. G. Otvos and W. E. Howat; #91014 (1992).

Search and Discovery.com

Cretaceous Transgression of Coahuila Peninsula, Potrero de la Mula and Sierra del Fuste, Coahuila, Mexico: ABSTRACT

James W. McKee, Norris W. Jones, Thomas S. Laudon, Benjamin Marquez D.

AAPG Bulletin

... are cut by dikes of six ages. Deep pre-Cretaceous weathering, thin transgressive arkose, and overlap by the Padilla Formation confirm these as basement...

Paleokarst Controls on Localization of Uranium at Pitch Mine, Sawatch Range, Colorado: ABSTRACT

J. Ann Dupree, R. Mark Maslyn

AAPG Bulletin

... silver and base-metal mineralization in several areas of the Sawatch Range. Paleokarst relief is well exposed on the Leadville Formation within a few...