Stratigraphy and structure of the Cedar Creek area of the Madison Range, Madison County, Montana Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/w3763b01h

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  • The Cedar Creek area, consisting of about 30 square miles, is located on the west flank of the central Madison Range in Madison County, Montana. The rocks of the area include carbonates, sandstones, mudstones, cherts, phosphorite, metamorphic rocks, intrusive igneous rocks, and unconsolidated sediments and have been divided into 16 mapped units. An undetermined thickness of Precambrian metamorphic basement rocks, approximately 7,000 feet of sedimentary rocks, and an undetermined thickness of Tertiary intrusive igneous rocks are exposed in the area. In addition, surficial deposits of unconsolidated alluvium and landslide debris are present in the area. Sedimentary rocks in the area are correlated with the Devonian Jefferson and Three Forks Formations, the Mississippian Lodgepole and Mission Canyon Formations, the Mississippian-Pennsylvanian Amsden Formation, the Pennsylvanian Quadrant Formation, the Permian Park City, Shedhorn, and Phosphoria Formations, the Triassic Dinwoody Formation, the Jurassic Sawtooth, Rierdon, and Morrison Formations, and the Cretaceous Kootenai Formation and Colorado Group. The area has undergone two major episodes of deformation. The first occurred in latest Cretaceous to Early Tertiary time when compressive forces produced thrust-faulting and folding in the area. During the second episode, tensional forces, probably related to epeirrogenic uplift, initiated normal faulting in the area. Stream erosion and several cycles of glaciation have modified the topography of the area to its present form. No stratigraphic or structural conditions in the area are favorable for the accumulation of oil and gas, Beds of furnace-grade phosphorite are present in the area, but at this time the cost of mining the phosphorite beds is far greater than the value of the phosphorite.
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  • File scanned at 300 ppi (Monochrome, 24 bit color) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR. Plate: Master map file scanned at 600 dpi, 24-bit color on a Paradigm ImagePRO GxT 42 HD (OEM version of ColortracSmartLF Bx 42). Image manipulated by SmartLF1.3.05.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-02-20T21:32:12Z (GMT) No. of bitstreams: 2 WhiteRichardE1974.pdf: 5871814 bytes, checksum: cb58723fcd8f15c4ff6d85f95a51d53c (MD5) Plate1White.pdf: 5359889 bytes, checksum: 41b8992300df668339351e6cd33ad1c6 (MD5)
  • description.provenance : Made available in DSpace on 2014-02-24T17:31:36Z (GMT). No. of bitstreams: 2 WhiteRichardE1974.pdf: 5871814 bytes, checksum: cb58723fcd8f15c4ff6d85f95a51d53c (MD5) Plate1White.pdf: 5359889 bytes, checksum: 41b8992300df668339351e6cd33ad1c6 (MD5) Previous issue date: 1973-07-30
  • description.provenance : Submitted by Madison Medley (mmscannerosu@gmail.com) on 2014-02-20T21:21:22Z No. of bitstreams: 2 WhiteRichardE1974.pdf: 5871814 bytes, checksum: cb58723fcd8f15c4ff6d85f95a51d53c (MD5) Plate1White.pdf: 5359889 bytes, checksum: 41b8992300df668339351e6cd33ad1c6 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-02-24T17:31:36Z (GMT) No. of bitstreams: 2 WhiteRichardE1974.pdf: 5871814 bytes, checksum: cb58723fcd8f15c4ff6d85f95a51d53c (MD5) Plate1White.pdf: 5359889 bytes, checksum: 41b8992300df668339351e6cd33ad1c6 (MD5)

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