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Petrology Of The Bull-Of-The-Woods Intrusive Complex, James Streshley Jackson

Dissertations and Theses

An area of unmapped intrusions lies within the Bull-of-the-Woods Roadless Area of Mount Hood National Forest. A variety of andesites, dacites,and diorites intruding units of tuff and andesite lava flows crop out over.an area of 52 sq km. These intrusions do not appear on the Geologic Map of Oregon West of the 121st Meridian (Hells and Peck, 1961). The purpose of this investigation is to map and describe these intrusions, with attention to the following questions:

What is the petrographic and geochemical nature of these intrusions?

What is the order of emplacement of these intrusions?

What is the probable mechanism …

Stratigraphy And Petrography Of The Selah Member Of The Ellensburg Formation In South-Central Washington And North-Central Oregon, Mavis Hensley Kent

Dissertations and Theses

The Ellensburg Formation of south-central Washington and north-central Oregon has been described by many workers from the time of the original description by Russell (1893) to recent work by Schmincke (1964). However, detailed information concerning the stratigraphy and petrography of the Ellensburg Formation in south-central Washington and north-central Oregon is not available. This study is among the first detailed studies made for a member of the Ellensburg Formation; it provides a specific comparison with the type Ellensburg of central Washington.

Quaternary Rhyolite From The Mineral Mountains, Utah, U.S.A., S. H. Evans, Jr., W. P. Nash, University Of Utah, Department Of Geology And Geophysics

All U.S. Government Documents (Utah Regional Depository)

A suite of silicic volcanic rocks is associated with the Roosevelt Hot Springs geothermal area in southwestern Utah. The volcanic sequence includes Tertiary rhyolite 8 m.y. old and obsidian, ash and rhyolite of Quaternary age. The Quaternary lavas are characterized by high silica content (76.5% SiO2) and total alkalies in excess of 9 percent. Obsidians commonly contain greater amounts of flourine than water. Two older flows (0.8 m.y.) can be distinguished from younger dome and pyroclastic material (approximately 0.5 m.y.) by subtle differences in their chemistry. The mineralogy of the rhyolites consists of alkali feldspar, plagioclase, and small amounts of …

Ua66/8/3 Annual Report, Wku Geography & Geology

WKU Administration Documents

No abstract provided.

Tertiary Stratigraphy Of The Niobrara River Valley, Marsland Quadrangle, Western Nebraska, Conservation And Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Structural Geology Of The Brentwood-St. Paul Area, Northwest Arkansas, Mikel R. Shinn

Journal of the Arkansas Academy of Science

Photogeologic and field mapping of a 530 mi² area in southeastern Washington and southern Madison Counties, Arkansas, indicates that post-Atoka structural deformation occurred primarily through differential uplift of basement fault blocks. Northeast and east trending basement faults and fracture systems are present. Northeast trending features are related to the major fracture systems of the stable continental interior. They were initiated by shearing during Pre-Cambrian time and have subsequently acted as crustal zones of weakness along which mostly vertical movement has occurred. East trending basement faults may have originally developed as a result of tension between the stable Ozark uplift and …

Geometry And Depositional Systems Of The Orr And Patterson Sands, Bloyd Formation (Pennsylvanian), Eastern Franklin And Western Johnson Counties, Arkansas, Michael E. Corbin

Journal of the Arkansas Academy of Science

The Orr and Patterson sandstones occur in the Trace Creek Shale Member, Bloyd Formation, in surface exposures on the northern Arkansas structural platform. The Orr sandstone exhibits regional thickening trends to the south and southeast into the Arkoma Basin as shown by isolith maps for the area studied. The depositional environment that formed this sandstone comprised fluvial or deltaic channels feeding a destructive delta system to the southeast. The Patterson sandstone lies stratigraphically above the Orr sandstone, and is confined essentially to Franklin and Johnson counties. It is poorly developed or not present in Washington and western Crawford Counties. The …

Geology Of The Lucea Inlier, Western Jamaica, Jack Grippi

Geology Theses and Dissertations

The Lucea Inlier exposes a Santonian to Campanian 4 km + thick sequence of shale-siltstone, resedimented volcaniclastics, lenses of shallow-water limestone, micritic limestone, pebbly mudstone and sandy pebble to boulder conglomerate. Clastics were deposited by a variety of gravity flow mechanisms. Petrographically sandstones are lithic or feldspathic arenites and contain only very small amounts of detrital quartz. Structurally the inlier is characterized by simple, open, east-west trending folds. A spaced, vertical axial-planar cleavage is developed in shales and fine siltstones. Two major east-west trending left-lateral fault zones, the Fat Hog Quarter and Maryland faults, cut the inlier into three blocks, …

Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1978

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Water Resources Of Seward County, Nebraska, C. F. Keech

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Stratigraphy Of The Lower Tertiary And Upper Cretaceous (?) Continental Strata In The Canyon Range, Juab County, Utah, James M. Stolle

Theses and Dissertations

The Canyon Range Formation (informal new name), formerly mapped as the Indianola Group within the Canyon Range, is divisible into two distinct, mappable units, A and B. Unit A is nearly all conglomerate strata, and conglomerate texture and sedimentary structures suggest an alluvial fan depositional environment. Precambrian and basal Cambrian quartzite clasts represent the erosional debris from the allochthonous Canyon Range thrust. Unit B is composed of interbedded fluvial sandstone and conglomerates with lacustrine limestones, commonly micritic and/or oncolitic. Conglomerate clasts indicate a Paleozoic carbonate provenance. Unit A, previously mapped as the Indianola, underlies Unit B and correlates with the …

Depositional Systems Of The Sells And Cecil Sandstones, Atoka Formation (Pennsylvanian), Eastern Crawford And Western Franklin Counties, Arkansas, Chris A. Cardneaux

Journal of the Arkansas Academy of Science

The Cecil and Sells sandstones of the Atoka Formation (Pennsylvanian) were studied in the subsurface of eastern Crawford and western Franklin Counties. Sand of the Cecil sandstone was delivered to a high destructive, wave dominated delta southeast of Fort Smith and reworked laterally by longshore currents to form coastal barrier sands to the east. The Sells sandstone unit accumulated as a distributary channel system that bifurcates to the southeast and southwest. The interdistributary areas are characterized by immature sands interbedded with shales. These immature sands were deposited by crevasse splays and reworking of the distributary mouth bars by marine processes …

Glacial Deposits, Vol. 6, 1977-1978, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology

Regional Tectonics And Seismicity Of Eastern Nebraska, Annual Report June 1, 1978- May 30, 1979, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

A Need For Redefinition Of North American Pleistocene Stages, J. D. Boellstorff

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Nebraska Mineral Operations Review, 1977, Raymond R. Burchett, Duane A. Eversoll

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Groundwater Levels In Nebraska, 1977, Michael J. Ellis, Darryll T. Pederson

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Structure Of The Tarkio Limestone Along The Humboldt Fault Zone In Southeast Nebraska, R. R. Burchett, J. L. Arrigo

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Landsat Image Analysis Of Linears And Lineaments In The Tri-State District, Missouri-Oklahoma-Kansas, Solomon Hartley Toweh

Masters Theses

"Lineations within the Tri-State mining district are classified as megalineaments, lineaments and linears, based on length. One megalineament, 120 lineaments and 205 linears are identified on the LANDSAT imagery. In order of importance a dominant northeast set, northwest set, north-south set and east-west set are recognized. These range from 0.8 miles (1.3 km) to 68 miles (109.4 km) in length.

Major lineation trends spatially relate with trends of mined areas In the Picher field both northeast and northwest lineations generally parallel mined areas. In the Galena field ore and lineations trend northeast while in the Joplin and Duenweg-Webb City-Oronogo field …

The Paleontology And Biostratigraphy Of The Lower Ordovician Gasconade Formation Of Missouri, Bruce L. Stinchcomb

Doctoral Dissertations

"The biostratigraphy, paleoecology and paleontology of the Lower Ordovician Gasconade Formation in Missouri is reinvestigated in an attempt to solve problems that have arisen since the classic earlier studies by Ulrich, Bridge and others. Twelve faunal zones are established, many based on primitive mollusks which dominate the formation. The oldest of these, in the Van Buren Member, is the Hypseloaonus Zone. This is followed by a zone characterized by the primitive cephalopod Dakeoaeras then a zone dominated by the gastropod Sinuopea. These zones are succeeded by the Euomphalopsis, Matthevia and Ozarkina Zones which lie stratigraphically below the Cryptozoon Zone, …

Sedimentology Of The Hannibal Formation In Northeastern Missouri And Western Illinois, Michael Harry Deming

Masters Theses

"The Hannibal Formation (Kinderhookian) occurring in northeastern Missouri and western Illinois is a fine-grained, terrigenous, sedimentary unit which can be divided into an upper and a lower portion, based on lithology. The upper portion consists of alternating coarse and argillaceous, fine siltstone units, while the lower portion consists of a silty mudstone with an occasional thin siltstone unit. At the extreme western margin of the formation, near where the Hannibal almost pinches out, the formation consists entirely of a silty claystone. Extending southward along the study area, the coarse siltstone units of the upper Hannibal become thinner, and eventually pinch …

Paleoecology Of A Late Quaternary Biota At The Mcclusky Canal Site, Central North Dakota, Linda E. Okland

Theses and Dissertations

Abundant and well-preserved Late Quaternary fossils were exposed at the McClusky Canal Site in the Missouri Coteau district of central North Dakota during the late summer and fall of 1976. Strati graphic units, in ascending order, are: (l) pebbly, clayey sand; (2) unlaminated, organic claystone; (3) laminated, organic claystone; (4) pebbly, sandy claystone; (5) laminated, organic claystone; (6) gypsiferous claystone; and (7) silty claystone. Units 1 and 4 are inter preted to be till, and the remainder are lacustrine sediments. Total thickness of the section is 6.0 m.

Radiocarbon dates of 12,595 ± 375 radiocarbon years B.P. (from the boundary …

Heat Flow And Heat Production Studies In North Dakota, Richard Scattoline

Theses and Dissertations

Thirty-one new heat flow determinations in North Dakota range from 0.6 to 1.9 HFU. The majority of heat flow measurements were completed for southwestern North Dakota.

Heat flow measurements were made in both oil and water wells. Heat production data from basement rocks when used in conjunction with nearby heat flow values indicate that only two of six sites may be considered to be similar to Basin and Range type of heat flow. One site occurs in southwestern North Dakota in a region west of 103° W where no heat flow value is less than 1.5 HFU. The other site …

A Geomagnetic Survey Of Pembina, Grand Forks, And Eastern Walsh Counties, North Dakota, Howard E. Okland

Theses and Dissertations

From August, 1977, to March, 1978, total field geomagnetic readings were taken at 948 sites in the following counties in North Dakota: Pembina County, Grand Forks County, and Walsh County east of 98°W. longitude. The field data was contoured by computer using the SYMAP commercial computer program. Nine major and several minor magnetic anomalies were discovered. Trends present on the aeromagnetic map of Minnesota continue westward into North Dakota. Limited bore hole data and the geomagnetic map suggest that the study area is underlain by Precatnbrian rocks of the Superior geologic province. The northernmost trend may indicate a western extension …

Petrology Of Sandstones From The Bullion Creek And Sentinel Butte Formations (Paleocene), Little Missouri Badlands, North Dakota, Mark A. Steiner

Theses and Dissertations

The mineralogy and petrology of sandstones of the Paleocene Bullion Creek and Sentinel Butte Formations were studied from exposures in the Little Missouri River Badlands in Billings, Golden Valley, and McKenzie Counties, North Dakota. Field work was conducted in the summer of 1977. Stratigraphic sections were measured and described from eight localities. Sandstones were sampled at 47 levels, and three samples were collected from each level. Fifty-one samples were collected from the Bullion Creek Formation and 90 from the Sentinel Butte Formation.

Thin-sections were prepared from plastic grain-mount blocks containing disaggregated sand grains, and 200 points per thin-section were counted, …

The Rhame Bed (Slope Formation, Paleocene), A Silcrete And Deep Weathering Profile, In Southwestern North Dakota, Barbara D. Wehrfritz

Theses and Dissertations

The Rhame Bed is a unit at the top of the Slope Formation (for merly part of the "Ludlow Formation") in the Fort Union Group deposited during Paleocene time.

The Rhame Bed was mapped in western Slope County and north central Bowman County. The bed outcrops on the tops of buttes, at the present groJnd surface in large level areas, or in steep slopes. Although the bed is laterally discontinuous, it is a clearly mappable unit.

The Rhame Bed typically consists of two dominant lithologies: siliceous rock and white sediment. The siliceous rock is hard, gray, and made of silt-sized …

Stratigraphy And Depositional Setting Of The Carrington Shale Facies (Mississippian) Of The Williston Basin, Peter F. Bjorlie

Theses and Dissertations

The Carrington shale facies is a radioactive illitic lagoonal shale, apparently deposited behind lime mudstone banks (Waulsortian bioherms), along the eastern margin of the Williston basin during Early Mississippian time.

The Scallion subinterval, which is the basal subunit of the Bottineau interval of the Madison Formation in North Dakota, is divisible into six lithologic facies, one of which is the Carrington shale facies. West of the shale facies, on the basin-shelf hinge line, is the lime mudstone facies. Basinward of this facies is the interbedded shale-limestone facies. Stratigraphically above the latter two facies is the sand-silt-shale facies. Overlying a portion …

Geology Of The Flathead Formation (Middle Cambrian) On The Perimeter Of The Bighorn Basin, Beartooth Mountains, And Little Belt Mountains In Wyoming And Montana, Joel A. Degenstein

Theses and Dissertations

The Flathead Formation, which is 4 to 60 metres thick in the middle and northern Rocky Mountains of Wyoming and Montana, contains cross-bedded and parallel-bedded, quartz sandstone. The formation contains marginal-marine and shallow-marine sediment that was deposited unconformably on Precambrian crystalline and sedimentary rock by an eastward-transgressing sea during middle Cambrian time.

This field study of the Flathead Formation on the perimeter of the Bighorn Basin, Beartooth Mountains, and Little Belt Mountains reveals that the formation consists of three intervals. The lower interval contains medium to very coarse, pebbly, cross-bedded sandstone and conglomerate. The middle interval contains medium to coarse, …

Depositional And Paragenetic Controls On Porosity Development, Upper Red River Formation, North Dakota, Kipp W. Carroll

Theses and Dissertations

The upper Red River Formation in North Dakota comprises a subtidal/intertidal facies overlain by three evaporitic sequences of four lithologic units each, labeled "P," "R," and "F" in stratigraphic order. Four porosity zones are recognized in the upper Red River: the subtidal/ intertidal facies forms one porosity zone, and each evaporitic sequence contains another. Each unit in a sequence, as well as the sequence itself, is thinner and less widespread than its preceding counterpart. All strata are laterally continuous across the main part of the Williston basin in North Dakota, but, the porosity zones eventually disappear to the east as …

A Petrochemical Characterization Of Certain Dsdp Subaqueous Basalts And Andesites From The Indian Ocean, John Lee Berkley

Earth and Planetary Sciences ETDs

Thirty-eight samples of Indian Ocean subaqueous basalt and andesite recovered by the Deep-Sea Drilling Program (DSDP) were analyzed by the following methods: (1) standard petrographic analysis, (2) electron microprobe analysis of major minerals, (3) bulk-rock analyses for major, minor, and trace elements, including eight rare earth elements (REE), and (4) determination of 87Sr/86Sr by mass spectroscopy. A varied suite of basement igneous rocks was studied, including (1) abyssal tholeiites, (2) ferrobasalts, (3) oceanic andesites, (4) transitional basalts (high-Al basalts), and (5) trachybasalts.