Origin And Distribution Of Six Heavy Mineral Placer Deposits In Coastal Marine Sandstones In The Upper Cretaceous Mccourt Sandstone Tongue Of The Rock Springs Formation Southwest Wyoming
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Origin and Distribution of Six Heavy mineral Placer Deposits in Coastal marine Sandstones in the Upper Cretaceous McCourt Sandstone Tongue of the Rock Springs Formation Southwest Wyoming
Author | : Henry W. Roehler,Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 44 |
Release | : 1989 |
Genre | : Heavy minerals |
ISBN | : ERDC:35925000900685 |
Download Origin and Distribution of Six Heavy mineral Placer Deposits in Coastal marine Sandstones in the Upper Cretaceous McCourt Sandstone Tongue of the Rock Springs Formation Southwest Wyoming Book in PDF, Epub and Kindle
The geology of six geographically separated but geneti- cally related heavy-mineral placer deposits are investigated along 40 miles of coastal-marine sandstone outcrops comprising the McCourt Sandstone Tongue. The heavy- mineral placer deposits consist of dark-brown to black, fine- to medium-grained, ferruginous sandstones that occur in elongated lenses that are as much as 6.6 ft thick and 2,000 ft long. The placer deposits are mostly intercalated with light-gray or tan quartzose shoreline sandstones that offlapped southeastward across the study area and formed a strand plain during a regression of the interior Cretaceous sea. The placers were deposited along a single shoreline during one stage of the regression. The heavy-mineral placer deposits are composed of about 85 percent opaque iron minerals, mostly magnetite, hematite, and ilmenite, and about 15 percent nonopaque minerals, mostly zircon, with minor amounts of tourmaline, rutile, garnet, sphene, hornblende, apatite, and traces of other minerals. The depositional settings are river mouth, berm, forebeach, surf, and middle shoreface, where the segregation of light and heavy minerals took place by fluvial, marine, and eolian processes. A plutonic source for most of the heavy minerals was probably the Sevier orogenic belt located 150-250 miles west of the study area. The heavy-mineral deposits in the McCourt Tongue are analogous in origin to that of heavy-mineral deposits that are presently forming along the southeast Atlantic and gulf coasts of the United States.
U S Geological Survey Bulletin
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 44 |
Release | : 1983 |
Genre | : Geology |
ISBN | : RUTGERS:39030041199516 |
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U S Geological Survey Bulletin
Author | : Henry W. Roehler,K. Y. Lee |
Publsiher | : Unknown |
Total Pages | : 378 |
Release | : 1989 |
Genre | : Coal |
ISBN | : OSU:32435022084305 |
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New Publications of the Geological Survey
Author | : Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 836 |
Release | : 1989 |
Genre | : Geology |
ISBN | : UOM:39015023323820 |
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New Publications of the U S Geological Survey
Author | : Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 60 |
Release | : 1989 |
Genre | : Geology |
ISBN | : MINN:31951T00154965Q |
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Coastal Sedimentation Along a Segment of the Interior Seaway of North America Upper Cretaceous Baxter Shale and Blair and Rock Springs Formations Rock Springs Uplift Southwest Wyoming
Author | : Henry W. Roehler,Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 44 |
Release | : 1993 |
Genre | : Geology, Stratigraphic |
ISBN | : UOM:39015095145069 |
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Location and description of outcrops of paralic and marine delta, shelf, slope, and basin deposits.
A Petrologic Study of the Fox Hills Sandstone Rock Springs Uplift Wyoming
Author | : N. L. Hickling,Geological Survey (U.S.) |
Publsiher | : Unknown |
Total Pages | : 24 |
Release | : 1991 |
Genre | : Fox Hills Formation |
ISBN | : ERDC:35925002474234 |
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A petrographic and stratigraphic study of the Fox Hills Sandstone interpreting provenance, depositional environment, and diagenesis.
U S Geological Survey Bulletin
Author | : E. A. Du Bray,E. C. T. Chao,Henry W. Roehler |
Publsiher | : Unknown |
Total Pages | : 116 |
Release | : 1983 |
Genre | : Cretaceous-Tertiary boundary |
ISBN | : OSU:32435056588205 |
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