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2 edition of Meshik arc, an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula found in the catalog.

Meshik arc, an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula

F. H. Wilson

Meshik arc, an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula

by F. H. Wilson

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  • 28 Currently reading

Published by Division of Geological and Geophysical Surveys in Anchorage, Alaska .
Written in English

    Places:
  • Alaska,
  • Alaska Peninsula.
    • Subjects:
    • Island arcs -- Alaska -- Alaska Peninsula.,
    • Geology, Stratigraphic -- Eocene.,
    • Geology, Stratigraphic -- Miocene.,
    • Geology -- Alaska -- Alaska Peninsula.

    • Edition Notes

      Bibliography: p. 13-14.

      Statementby F.H. Wilson.
      SeriesProfessional report / State of Alaska, Division of Geological and Geophysical Surveys ;, 88, Professional report (Alaska. Division of Geological and Geophysical Surveys) ;, 88.
      Classifications
      LC ClassificationsQE511.2 .W55 1985
      The Physical Object
      Paginationiii, 14 p. :
      Number of Pages14
      ID Numbers
      Open LibraryOL2667498M
      LC Control Number85622423

      The Meshik Arc - an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula, Wilson, F. H., , The Meshik Arc - an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula: Alaska Division of Geological & Geophysical Surveys Professional Report PR , 14 p. Eocene to Miocene, Sedimentary, shallow-marine-siliciclastic Gunners Cove Formation, tuffaceous conglomerate and sandstone, crystal-vitric basaltic tuff, thin basalt flows, and basaltic dikes.

      The end of Cretaceous time on the Alaska Peninsula ap-pears to have been marked by a renewal of mountain growth which finds its expression in the increasing coarseness of the youngest Cretaceous deposits* The next succeeding deposits consist of Eocene tuff, which shews that the diastrophic move-that began tm late Cretaceous time afterwards. @article{osti_, title = {Cenozoic evolution of the Antarctic Peninsula continental margin}, author = {Anderson, J.B.}, abstractNote = {Cenozoic evolution of the Antarctic Peninsula continental margin has involved a series of ridge (Aluk Ridge)-trench collisions between the Pacific and Antarctic plates. Subduction occurred episodically between segments of the Pacific plate that are.

        The five cratonic nuclei of the Indian shield, referred to as (i) Dharwar (ii) Bastar (iii) Singhbhum (iv) Bundelkhand and (v) Aravalli Cratons, comprise the oldest surviving landmasses of the Indian sub-continent preserving fragments of supracrustals and volcano-sedimentary sequences of Archean greenstone belts that range in age from to – Ga (Fig. 1A). The Alaska-Aleutian Arc extends for more than km westward from central Alaska to the Kamchatka Peninsula. The timing of Aleutian Arc inception and subsequent compositional evolution through the initial stages of arc growth are poorly known. Early estimates of Aleutian Arc inception varied from 70 to 40 Ma (e.g., Grow and Atwater,


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Meshik arc, an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula by F. H. Wilson Download PDF EPUB FB2

The Meshik Arc - an eocene to earliest miocene magmatic arc on the Alaska Peninsula. Authors: Wilson, F.H. Publication Date: ; Publisher: Alaska Division of Geological & Geophysical Surveys. The Meshik arc is herein defined to include Eocene to earliest Miocene volcanic and hypabyssal rocks and the associated Meshik and Stepovak Formations of the central Alaska Peninsula.

Igneous rocks range from basalt to dacite and yielded K-Ar ages of 48 Meshik arc 22 by: Meshik arc, an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula.

Anchorage, Alaska: Division of Geological and Geophysical Surveys, (OCoLC) Material Type: Government publication, State or province government publication: Document Type: Book: All Authors / Contributors: Frederic H Wilson. ON THE ALASKA PENINSULA BY F.H. wilsonl The Meshik arc is herein defined to include Eocene to earliest Miocene volcanic and hypabyssal rocks and the associated Meshik and Stepovak Formations of the central Alaska Peninsula.

Igneous rocks range from basalt to dacite and yielded K-Ar ages of 48 to 22 m.y. The Meshik arc is oriented along the trend of the Alaska Peninsula, subparallel to the.

Wilson, F.H., The Meshik arc—an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula. Alaska Division of Geological and Geophysical Surveys Professional Report   E.S.

Finzel, K.D. Ridgway, Links between sedimentary basin development and Pacific Basin plate kinematics recorded in Jurassic to Miocene strata on the western Alaska Peninsula, Lithosphere, /L, 9, 1, (), (). Along the western Alaska Peninsula, the Aleutian and Meshik volcanic arcs initiated in response to a shift toward more orthogonal subduction.

These arcs are part of a middle-late Eocene time and extend over 3, km on the northern rim of the Pacific basin. They are therefore the optimum locations for studies of mantle processes and magmatic addition to the crust in subduction zones. This volume contains a collection of papers that exploit the relative simplicity of intra-oceanic subduction systems to provide insights into the tectonic, magmatic and hydrothermal processes associated with subduction.

[8] The Alaska Peninsula basement is composed of the Peninsular terrane, an allochthonous mass of mostly arc magmatic rocks that accreted to the margin ∼ Ma b.p.

This terrane consists of Upper Triassic to Lower Cretaceous volcanic and volcaniclastic rocks overlying a basement composed of Upper Paleozoic carbonate and schist [ Plafker and. a calc-alkaline magmatic arc of Eocene through early Miocene age, termed the Meshik arc by Wilson (, are preserved as close as 5 km to the southetist and 8.

The modern arc that is situated outboard of the study area, however, is inferred to have initiated during the early Eocene in the Aleutians (Jicha et al., ), and the oldest arc-related igneous rocks on the Alaska Peninsula near the study area are the middle Eocene to Oligocene Meshik arc (Wilson et.

Naknek-derived arkosic sandstones have been found along most of the length of the Alaska Peninsula (McLean, ), suggesting the presence of granitic rocks in the subsurface. Volcanic rocks from the Eocene to Miocene Meshik arc surround the SE half of the present Aniakchak caldera (Wilson, ).

F.H. WilsonThe Meshik arc—an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula Alaska Division of Geological and Geophysical Surveys Professional Report 88 () Google Scholar. The Alaska Peninsula is composed of the late Paleozoic to Quaternary sedimentary, igneous, and minor metamorphic rocks that record the history of a number of magmatic arcs.

These magmatic arcs include an unnamed Late Triassic(?) and Early Jurassic island arc, the early Cenozoic Meshik arc, and the late Cenozoic Aleutian arc. and Shew (). The Meshik magmatic arc (Wilson, ) as defined consists of Eocene io early Miocene volcanic, volcaniclastic, and related sedimentary rocks of the Alaska Peninsula (units Tm, Tp, Ts, and part of unit Tt).

Prior to its definition, all Cenozoic igneous rocks on the Alaska Peninsula and in the Aleutians were classified as the. The Alaska Peninsula is composed of the late Paleozoic to Quaternary sedimentary, igneous, and minor metamorphic rocks that record the history of a number of magmatic arcs.

These magmatic arcs include an unnamed Late Triassic (?) and Early Jurassic island arc, the early Cenozoic Meshik arc, and the late Cenozoic Aleutian arc. Representative 1D velocity depth functions for island arc crust were calculated by averaging the sections of the 2D arc velocity models listed in Table (but excluding the continental part of Aleutian line A3) using three difference reference datums: mean sea level, the seafloor (taken to be the km s −1 isovelocity contour), and the top of the igneous crust (Fig.

EVOLUTION OF THE NORTH AMERICAN CORDILLERA EVOLUTION OF THE NORTH AMERICAN CORDILLERA Dickinson, William R. The Cordilleran orogen of western North America is a segment of the Circum-Paciï¬ c orogenic belt where subduction of oceanic lithosphere has been underway along a great circle of the globe since breakup of the supercontinent Pangea.

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Save for later. khalil ur rehman. interest in studying books. 04 June () Post a Review You can write a book review and share your experiences. Wilson, F. H.,The Meshik Arc - an Eocene to earliest Miocene magmatic arc on the Alaska Peninsula: Alaska Division of Geological & Geophysical Surveys Professional Report PR14 p.The Volcanic Geology of the Mid-Arc Island of Dominica, Lesser Antilles—The Surface Expression of an Island-Arc Batholith.

Geological Society of America Special Paper ; pp., many figs./phot., 1 col. plt. with geol. map. Paperback, very good, as new, 4to.Cambridge Core - Mineralogy, Petrology and Volcanology - Glaciovolcanism on Earth and Mars - by John L.

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