5 edition of Jurassic igneous rocks of the Culpeper Basin, Virgina found in the catalog.
Jurassic igneous rocks of the Culpeper Basin, Virgina
Richard P Tollo
by American Geophysical Union
Written in English
|The Physical Object|
|Number of Pages||19|
Jurassic Period - Jurassic Period - Jurassic geology: Jurassic igneous rocks have yielded uranium and gold in the Sierra Nevada range of North America, including placer deposits that were mined during the California Gold Rush of the mids. Some of the diamonds in Siberia were emplaced during Jurassic times. The shallow seas inundating Jurassic continents allowed for extensive deposition of. Early Mesozoic Basins Workshop Fieldtrip No. 1: Field Guide to the Igneous Rocks of the Southern Culpeper Basin, Virginia: Usgs Open-File Report ISBN () Softcover, BiblioGov,
EXTRUSIVE IGNEOUS ROCKS Jb basalt. Fine- to medium-crystalline, equigranular, porphyritic, vesicular, or amygdaloidal; medium- to dark-gray subophitic intergrowths of plagioclase laths and clinopyroxene with amygdules of calcite, zeolites, and prehnite. Occurs only in the Culpeper basin as three principle basalt flows separated by sedimentary. Early Mesozoic Basins Workshop Fieldtrip No. 1: Field Guide to the Igneous Rocks of the Southern Culpeper Basin, Virginia: Usgs Open-File Report [Richard P. Tollo, David Gottfried, Albert J. Froelich] on *FREE* shipping on qualifying offers. The United States Geological Survey (USGS) is a scientific organization created in , and is part of the U.S. government.
The Culpeper basin is part of a much larger system of ancient depressions or troughs, that lie inboard of the Atlantic Coastal Plain, and largely within the Applachian Piedmont Geologic Province of eastern North America, and the transition region with the neighboring Blue Ridge Geologic Province. This basin system formed during an abortive attempt to make a great ocean basin during the Late. The Culpeper Basin is one of about 16 ma jor basins in eastern North America in which nonmarine sedimentation and volcanism oc curred in the Late Triassic and Early Jurassic, recording the beginning of rifting between the North American and African continental plates. The sedimentary rocks filling these ba.
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Jurassic Igneous Rocks of the Culpeper Basin, Virginia: Warrenton to Rapidan, Virginia, JVolume Jurassic igneous rocks of the Culpeper Basin, Virgina: Warrenton to Rapidan, Virginia, J (Field trip guidebook) [Richard P Tollo] on *FREE* shipping on qualifying offers.
Get this from a library. Jurassic igneous rocks of the Culpeper Basin, Virginia: Warrenton to Rapidan, Virginia, J [Richard P Tollo; A J Froelich; David Gottfried; American Geophysical Union.].
Jurassic Igneous Rocks of the Culpeper Basin, Virginia: Warrenton to Rapidan, Virginia, J Richard P. Tollo, Albert J. Froelich, David Gottfried(auth.) About The Product.
Technical Report: Geochemical data for Jurassic diabase and basalt of the northern Culpeper basin, Virginia. Partnered Journals. Chinese Journal of Geophysics () Earth Interactions; Earth and Planetary Physics; Geophysics; International Journal of Geomagnetism and Aeronomy. Igneous rocks of the Culpeper basin include 1) two extensive systems of diabase sheets, 2) three systems of chemically distinct diabase dikes, and 3) three series of multiple basalt flows.
The diabase intrudes both Upper Triassic and Lower Jurassic strata and the. Geologic setting The Virgina book basin in northern Virginia and Maryland is one of the largest in the succession of northeast-trending U.S. East Coast early Mesozoic basins that are filled with continental sedimentary rocks and basaltic igneous rocks of.
Late Triassic and Early Jurassic lacustrine sedimentation in the Culpeper basin, Virginia (P.J.W. Gore). A gravity and magnetic study of the Triassic Richmond basin, Virginia (K.L.
Mickus et al). Late Triassic depositional history of the Richmond and Taylorsville basins, eastern Virginia. Book chapter Full text access Chapter 26 - Base- and precious-metal mineralization associated with igneous and thermally altered rocks in the Newark, Gettysburg, and Culpeper early Mesozoic basins of New Jersey, Pennsylvania, and Virginia.
Fluvial and Lacustrine Facies of the Early Mesozoic Culpeper Basin, Virginia and Maryland by Joseph P. Smoot,available at Book Depository with free delivery worldwide. Occurs only in the Culpeper basin as three principle basalt flows separated by sedimentary rocks. Metasandstone and Metasiltstone (Proterozoic Z-Cambrian) at surface, covers % of this area Metasandstone and metasiltstone (Pavlides, ).
Extensive field studies on the African and North American plates during this past decade have yielded a wealth of new data and ideas about rift basins and the origin of passive margins. New surface and subsurface basins have been identified; fossils abound in strata that only recently were considered barren; oil exploration is being actively pursued in continental strata of the Richmond.
Triassic-Jurassic sedimentary rocks form the purple-red sandstone sediments in the Culpeper Basin. The red color shows magma that formed diabase, the hard rock that is quarried today Source: Virginia Department of Mines, Minerals and Energy Generalized Geologic Map of Virginia. The local rift basin, known as the Culpeper basin, extends from south of Culpeper, Va., to Frederick, Md.
The sedimentary rocks of the Culpeper basin are mostly fine-grained siltstone that produces a deep red, clay-rich soil, familiar to anyone who drives past construction sites in western Fairfax and Loudoun counties.
Occurrence and distribution of Jurassic rocks. Jurassic rocks are widely distributed and include sedimentary, igneous, and metamorphic rocks. Because of continuous subduction and destruction of ocean crust in trenches, Middle Jurassic oceanic crust and sediments are generally the oldest sediments remaining in the deep sea.
The Jurassic was a time marked by a high level of plate tectonic. Lindholm, R.C.,Geologic history and stratigraphy of the Triassic-Jurassic Culpeper basin, Virginia: Geological Society of America Bulletin, v.
90, no. 11, pts.p. (summary), (microfiche). Summary: The sedimentary and extrusive igneous rocks of the Culpeper basin in Virginia and Maryland are here named the Culpeper. Jurassic igneous rocks of the Culpeper Basin, Virgina: Warrenton to Rapidan, Virginia, J (Field trip guidebook) by Richard P Tollo ISBN ().
The rocks in this area traditionally have been considered part of the Newark Group and referred to as Triassic, but Cornet's () palynological study indicates that they range from Upper Triassic to Lower Jurassic. The Culpeper Basin is one of the many basins in North America in which sedimentation extended from Late Triassic to Early.
Major conglomeratic units of the Culpeper Basin occur in four members of the Bull Run Formation (Leesburg, Goose Creek, Cedar Mountain, and Barboursville Members) and in the Waterfall Formation.
These rocks are for the most part muddy/sandy pebble conglomerates, and are interpreted as. The Newark Supergroup, also known as the Newark Group, is an assemblage of Upper Triassic and Lower Jurassic sedimentary rocks which outcrop intermittently along the United States East were deposited in a series of Triassic basins approximately million years ago as North America separated from Africa.
The exposures extend from Nova Scotia to North Carolina.in Virginia is the Culpeper Basin. The Culpeper Basin extends from just south of Orange County northward into Maryland, a distance of more than km (Lindholm, ).
The rocks of the basin have traditionally been associated with the Triassic Newark Group (Fig. 5). For many years the Culpeper and related basins were referred to as Triassic. Most rocks are grouped into three rock types: igneous, sedimentary, and metamorphic; all three are found in Virginia.
Igneous rocks are formed when magma cools sufficiently to become solidified. The cooling may be rapid and result in the formation of natural glass (obsidian) or it may take place more slowly, thus permitting the crystallization.