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McCloud Limestone, Eastern Klamath Mountains, California

McCLOUD LIMESTONE The McCloud Limestone varies from 50 to 700 m in thickness and ranges from early Wolfcampian to early Leon-ardian age (Skinner and Wilde, 1965). The formation preserves a varied assemblage of carbonate facies and a diverse biota, and it accumulated in a shallow open marine setting (Dem-irmen and Harbaugh, 1965; Wilson, 1982).

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Volcaniclastic and carbonate sedimentation in late

The Carboniferous Baird Formation and Early Permian McCloud Limestone, Eastern Klamath Mountains, California, record depositional relations of volcaniclastic and carbonate sediments within an island-arc setting. Pennsylvania parts of the Baird include interbedded mudstone, sandstone, and pebbly sandstone of volcaniclastic composition.

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Volcaniclastic and carbonate sedimentation in late

Oct 01, 1985· The Carboniferous Baird Formation and Early Permian McCloud Limestone, Eastern Klamath Mountains, California, record depositional relations of volcaniclastic and carbonate sediments within an island-arc setting. Pennsylvania parts of the Baird include interbedded mudstone, sandstone, and pebbly sandstone of volcaniclastic composition. These beds accumulated by gravity displacement

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The McCloud Limestone 2021 NSS Convention

The McCloud Limestone will be extensively featured during our mid-week geology trip for cavers. Led by Joel Despain and Pat Kambesis, this caving trip proves to offer an exciting option for those wishing a more in-depth geology experience.

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Intra-arc sedimentation and tectonism: Late Paleozoic

The time-transgressive Upper Permian Bollibokka Group (Nosoni and Dekkas Formations) succeeds the McCloud Limestone, comprising thick sequences of volcanogenic debris, intercalated lava, and, in the upper part, lenses of shallow-water limestone. The Upper Permian strata reflect volcanism and rapid subsidence within the are.

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Permian Carbonate Platform Development in an Island-Arc

McCloud Limestone as it pertains to the develop-ment of carbonate platforms in a high-subsidence, island-arc setting. The McCloud Limestone is a re-gionally significant unit in the correlation and pa-leogeographic reconstruction of Permian tectono-stratigraphic terranes in western North America. Located within the eastern Klamath terrane of Cal-

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Chapter 4 Geology, Geomorphology, Minerals, and Soils

McCloud Limestone is exposed near the southern shore of Allie Cove in the eastern portion of the Main Body of the lake. Along the Big Backbone Arm, the McCloud Limestone is exposed near the eastern shore between the outlets of Shoemaker and Limerock creeks. Outside the Shasta Lake footprint, an

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Chapter 4 Geology, Geomorphology, Minerals, and Soils

McCloud Limestone is exposed near the southern shore of Allie Cove in the eastern portion of the Main Body of the lake. Along the Big Backbone Arm, the McCloud Limestone is exposed near the eastern shore between the outlets of Shoemaker and Limerock creeks. Outside the Shasta Lake footprint, an

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Permian Carbonate Platform Development in an Island-Arc

The McCloud Limestone, eastern Klamath terrane, California, represents one of several areas of carbonate deposition in an Early Permian island arc west of North America. The McCloud formed isolated platforms about 30 km long. Platform development began on volcanic highs as bank deposits and ramps of mixed volcaniclastic and carbonate sediments.

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Permian Carbonate Platform Development in an Island-Arc

McCloud Limestone as it pertains to the develop-ment of carbonate platforms in a high-subsidence, island-arc setting. The McCloud Limestone is a re-gionally significant unit in the correlation and pa-leogeographic reconstruction of Permian tectono-stratigraphic terranes in western North America. Located within the eastern Klamath terrane of Cal-

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Chapters 4 and 5

11 McCloud Limestone is exposed along the north and southern banks. The 12 McCloud Limestone is exposed near the southern shore of Allie Cove in the 13 eastern portion of the Main Body of the lake. Along the Big Backbone Arm, the 14 McCloud Limestone is exposed near the eastern shore between the outlets of 15 Shoemaker and Limerock creeks.

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Geology and Ore Deposits of East Shasta Copper-Zinc

3. Sketch of chert bodies in the McCloud limestone on ridge between Marble and Potter Creeks._____ 23 4. Map of the East Shasta copper-zinc district showing distribution of specimens of feldspathic rock collected at random containing albite of doubtful origin and albite of

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Paleozoic and Mesozoic rocks of the Almanor 151 quadrangle

Permian limestone block has yielded Early Permain fusulinids of probable McCloud Zone A affinity (C.H. Stevens, written commun., 1985), and the Triassic limestone blocks have yielded Late Triassic (late Carnian and Norian) fossils equivalent to those in the Hosselkus Limestone (Diller, 1892; Harwood,

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(PDF) Erythronium shastense (Liliaceae), A New Species

The early Permian McCloud Limestone crops out in a north-south belt in the Shasta Lake area of northern California. The McCloud ranges in thickness from less than 100 feet to about a half mile.

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Carboniferous Faunal Associations and Stratigraphy, Shasta

The Hirz Mountain Limestone Member (new name) of the Baird Formation, of late Pennsylvanian or early Permian age, contains an additional brachiopod association and a coral association, and is approximately correlative with the oldest part of the McCloud Limestone, which contains a brachiopod-fusulinid association.

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Carbonate Classification SEPM Strata

Most limestones are classified by Folk allochemical Rocks if they contain over l0% allochems (transported carbonate grains). Based on the percentage of interstitial material, the Rocks may be further subdivided into two groups: sparry allochemical limestones (containing a sparry calcite cement of clear coarsely crystalline mosaic calcite crystals) and microcrystalline allochemical limestone

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Effects of Sediment on the Aquatic Environment: NRCS

The lack of data about sediment transport into estuaries from rivers makes it extremely difficult to develop an accurate sediment budget for estuaries (Horne and Patton 1989). Sediment budgets are necessary for long-term planning in coastal areas. Sedimentation in the fluvial/estuarine interface is another area that requires more in-depth research.

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The Geologic Record of California The University of

McCloud River with Fusulina robusta, F. cylindrica, Clisio- phyllum gabbi Black siliceous shales of or areas of sedimentation, the Sierra Nevada, and the Coast Ranges, McCloud limestone of Shasta County, with Coal Measures fauna, and coral reefs

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Dispersed remnants of a northeast Pacific fringing arc

(4) McCloud belt terranes are spatially and possibly genetically related to westward lying accretionary complexes of the Cache Creek belt which contain fragments of Upper Triassic blueschist and Permian limestone blocks bearing Tethyan Permian fusulinids and corals.

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Mammoth Mine Western Mining History

Stratigraphically, the McCloud Limestone occurs between the Devonian and Permian volcanic arc sequences. Tethyan fauna defines the eastern belt. These distinct faunas suggest that their host rocks are far traveled (5,000 km or more) (Stevens and others, 1990), an interpretation that is incompatible with a simple back-arc basin model.

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PETROLOGY OF UPPER DEVONIAN PELLETOIDAL LIMESTONES, ARROW

As sedimentation progressed, the degree of fluctuation lessened and the environmental energy attained a uniformly high value. Similar Permian limestone with McCloud faunal affinities and slate

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