Geology Commons^™

Gage County, Odell/Krider Area, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Greeley County, Chalk Mine State Wayside Area, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Glacial Stratigraphy Of Southeastern North Dakota, Michael Camara

Theses and Dissertations

Seven lithostratigraphic units are recognized in the glacial sediment {till) of southeastern North Dakota. Five of these units are not formally named; eventually most of these units will be correlated with formations in surrounding regions. Two of these units, Gardar and Dahlen, are formations recognized in northeastern North Dakota {Hobbs, 1975). The seven lithostratigraphic units are differentiated and correlated using the percentage of the sand, silt, and clay fractions of the till and using the proportion of igneous and metamorphic rock fragments, limestone and dolomite fragments, and shale fragments in the very-coarse-sand fraction (1 to 2 mm) of the till. …

Chemical Composition Of Carbonatites In Conway And Perry Counties Of Arkansas, George H. Wagner, Kenneth F. Steele

Journal of the Arkansas Academy of Science

No abstract provided.

Test Sites For Farm Dams, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

A short article outlining procedures for testing potential dam sites.

Geology Of The Stateline District, Utah-Nevada, Terry Moore Collins

Masters Theses

"The rocks exposed in the Stateline District, Iron County, Utah and Lincoln County, Nevada, are Tertiary volcanics, which serve as hosts for gold and silver bearing quartz veins. The Miocene rhyolites and dellenites, a possible caldera, cupola-associated rock textures, and the faults and styles of deformations indicate the geologic setting of Stateline is in harmony with the tectonic framework of the southern Great Basin. Four map units, subdivided into nine members, are recognized. X-ray fluorescence analyses for SiO₂, TiO₂, Fe₂O₃, CaO, and K₂O differentiated the map units, while variations in the primary quartz, sanadine, plagioclase, biotite, hornblende, and total crystal …

Geology And The Barite Potential Of The Raymond Widel Area, Cooper County, Missouri, German Francisco

Masters Theses

"The Raymond Widel barite prospect is two miles northeast of Blackwater Town, in parts of Sections 23, 24, 25, and 26, T49N, R19W, Cooper County, Missouri. Reported in the area since the 1850's barite-galena deposits have been sporadically mined.

The Burlington-Keokuk and Warsaw formations of Mississippian age are exposed. The former is composed of coarse-grained limestone with abundant fossils, and the latter is a fossiliferous cherty limestone. These reach a thickness of over 200 feet. Local structures are not significant, but regional fold and fault structures are present outside the area.

Exploration drilling consisted of 31 drill holes ranging from …

Glacial Deposits, Vol. 5, 1976-1977, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology

The Late Cenozoic Geology Of West-Central Minnesota From Moorhead To Park Rapids, Roderic L. Perkins

Theses and Dissertations

Based on lithostratigraphic and geomorphic information, the Quaternary history of an area bounded by the Red River of the North, 95°00' west longitude, 47°00' and 46°45' north latitude in west central Minnesota, includes seven geologic episodes:

Glacial advances and retreats over all or part of the study area occurred during the first six geologic episodes. The glaciers advanced either southward across northern Minnesota, entering the study area from the northeast; or across eastern North Dakota and southwestern Manitoba, entering the study area from the northwest. As a result of these glacial events the sediment of Unit A, Sebeka Formation, New …

Regional Tectonics And Seismicity Of Eastern Nebraska, Annual Report June 1977- May 1978, R. R. Burchett, D. G. Maroney

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Nebraska Mineral Operations Review, 1976, Raymond R. Burchett, Duane A. Eversoll

Conservation and Survey Division: Faculty and Staff Publications

During 1976, there were active in Nebraska 41 limestone quarries; 592 sand, gravel and silt or siltstone pits; 8 clay or shale pits; 24 sandstone pits; and 1 peat pit. These 666 mining operations disturbed 820 acres and restored 78 acres during the year.

Water Resources Data For Nebraska Water Year 1976

Conservation and Survey Division: Faculty and Staff Publications

Water resources data for the 1976 water year for Nebraska consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and water levels and water quality in wells and springs. This report contains discharge records for 146 gaging stations; stage and contents for 9 lakes and reservoirs; water quality for 40 gaging stations, 18 ungaged stations, 27 partial-record flow stations, and 96 wells; and water levels for 66 observation wells. Also included are 114 crest-stage partial-record stations and 12 low-flow partialrecord stations. Additional water data were collected at various sites, not part …

Sarpy County, Gretna State Fish Hatchery Area (Schramm Park), R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Jefferson County , Fairbury Area, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Sarpy County, Gretna State Fish Hatchery Area, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Jefferson County , Fairbury Area, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Petrology Of The Alaskites Of The Boulder Batholith, Montana, Kenneth C. Malick

Theses and Dissertations

The Boulder batholith outcrops in the Northern Rookies of western Montana. It is exposed over an area of 5700 km^2 and extends about 112 km along the continental divide from Mullen Pass on the north to 32 km south of Butte. The Boulder batholith represents an invasion of the upper zones of the crust by a large volume of fluid granodioritic quartz monzonitic magma emplaced at the close of a main orogenic episode during late Cretaceous and Paleocene time.

Eight alaskite bodies were chosen for sampling from previous field experience and from geologic maps published by the U.S.O.S. Textural descriptions, …

Geology Of The Al-Khums Area Northwestern Libya With Emphasis On The Stratigraphy And Biostratigraphy Of The Al-Khums Formation, Mostafa Juma Salem

Doctoral Dissertations

"The dissertation represents a geologic study of an area bordering the Mediterranean Sea in northwestern Libya. About 1200 km² were mapped and 28 stratigraphic sections were prepared.

The bedrock consists of 16 stratigraphic units of Mesozoic and Cenozoic age having a combined maximum thickness of about 750 meters. The oldest unit exposed, the Abu Shaybah Formation, is a redbed sequence of Triassic and Jurassic age. These beds are unconformably separated from Cretaceous carbonates (Garian Limestone, Ain Tobi Formation, and Gezzar Dolomite). These units in turn are overlain by the Miocene Al-Khums Formation. Younger Quaternary units consist of nearshore marine …

Geologic Factors Influencing Speleogenesis In The Capitan Reef Complex, New Mexico And Texas, David Henry Jagnow

Earth and Planetary Sciences ETDs

The purpose of this thesis is to determine the geologic factors that have influenced speleogenesis (origin of caves) in the Capitan reef complex (Permian) exposed along the northeast prong of the Guadalupe Mountains of New Mexico and Texas. This study of 52 caves included mapping caves, joints, and cross sections, determining stratigraphic position, generating joint rose diagrams, and photographing the geologic and hydrologic controls on speleogenesis.

Most Guadalupe caves are strongly controlled by vertical joints that parallel or are nearly perpendicular to the reef escarpment. East of Rattlesnake Canyon, caves generally develop along joint swarms that parallel the reef escarpment; …

Paleozoology Of Cores From The Tyler Formation (Pennsylvanian) In North Dakota, U.S.A., James C. Grenda

Theses and Dissertations

A well-preserved fauna from the Tyler Formation was studied in cores from 34 wells drilled for oil in Billings, Golden Valley, McKenzie, Slope, and Stark Counties. Forty-four species of invertebrates, eleven form-species of conodonts, at least three types of fish, and at least four genera of plants· are present. Invertebrate species include 1 bryozoan, 15 brachiopods, 14 bivalves, 2 gastropods, 2 cephalopods, 2 annelids, 2 branchiopoda, at least 2 ostracodes, 2 malacostracans, 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible crossopterygian fish. A new genus and species of eocarid malacostracan …

Lower Mississippian Sedimentation In Northwestern Montana, Forest E. Haines

Doctoral Dissertations

"Thirty-three measured sections, nine with thin sections and insoluble residues, were studied to determine the depositional history of the Allan Mountain Limestone and the lower member of the Castle Reef Dolomite of the Madison Group in northwestern Montana.

The Allan Mountain base is a fossiliferous limestone, herein named the Brownback Gulch Member, which thickens and becomes cherty to the southwest where the section at Lone Butte resembles that of the Bridger Range Waulsortian-type reefs. A crinoidal lag deposit marks a dis- conformity at the top. In the overlying silty limestone member a thin black shale (Unit 1) grades into normal …

Geology Of The Southern Half Of The Stoutland, Missouri Quadrangle, Chester Encell Nichols

Doctoral Dissertations

"The dissertation area lies on the western flank of the Ozark uplift between Lebanon and Camdenton, Missouri. In the northwestern corner of the study area a portion of the Decaturville cryptoexplosive structure is exposed. The dominant structure outside the disturbed zone is a northwest-trending asymmetrical anticline with a subsidiary normal fault dipping southwest on the steeper southwest limb.

The area is mapped in considerable detail in order to describe subtle structural features. To overcome a problem of poor exposures, new key beds are defined which greatly increase structural control. Significant structures recognized as a result are the Dry Auglaize anticline, …

Groundwater In The Wheatbelt, E P. O'Driscoll

Journal of the Department of Agriculture, Western Australia, Series 4

In general six factors affect the occurence of groundwater; rainfall, topography, rock type, rock structurs, vegetation, and local evaporation.

Variation in even one of these can affect the potential yield of a bore or well, the groundwater salinity, and even whether any groundwater occurs at all.

Petrology Of The Rockport Quarry Limestone (Middle Devonian Traverse Group) Alpena, Presque Isle And Montmorency Counties, Michigan, Charles Willard Cookman

Masters Theses

The basal unit of the dominantly carbonate Traverse Group, the Bell Shale, is gradationally overlain by the Rockport Quarry Limestone which has a thickness of approximately 14 m. The Rockport Quarry Limestone is composed of a dark unrestricted marine subtidal organic-mud packstone facies, comprised of an algal-mat-bearing coral packstone subfacies and a shallower water crinoid-bryozoan grainstone subfacies; a shoal forming stromatoporoid biolithite facies; and a lagoonal micrite facies comprised of a subtidal dense subfacies containing gastropods, ostracods, and calcispheres, and an Intertidal to supratidal fenestral subfacies. The local facies tract reconstructed for the Rockport Quarry Limestone is interpreted to be …

Groundwater Levels In Nebraska, 1975, Michael J. Ellis, Darryll T. Pederson

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

The Glacial Geology Of Mckenzie County, North Dakota, Clark Fulton

Theses and Dissertations

Fourteen lithostratigraphic units composed of windblown, glacial, lake, slopewash, and stream sediment were distinguished in McKenzie County, The units were mapped using aerial photographs, topographic maps, and soil maps combi11ed with field e:xaminations of sediment outcrops. Eight of the units have been formally named and described in earlier studies. Four of them, however, have not been a"~ previously named and formally described .a.nu assigned names in this study. Two other units are described, but because of their limited exposure, are not assigned a formal lithostratlgraphic name. The oldest sediment exposed in the county was deposited during the Paleocene and the …

Long-Distance Turbidite Correlations In The Horseshoe Abyssal Plain, William H. Hoyt

Geology Theses and Dissertations

Few studies on modern abyssal plain turbidites have attempted to assess the lateral extent of individual units and few have therefore been able to provide any information on the evolution of turbidity deposits across long abyssal plain distances. In the 4755 m-deep Horseshoe Abyssal Plain, ten distinct lithologic units (six of these Iberian Peninsula-derived turbidites) were delineated in nine piston cores on the basis of stratigraphic position, thickness (range of 20 cm to greater than 500 cm), color, sediment type, sedimentary structures, x-ray mineralogy, and the ubiquitous presence of units in all abyssal plain and supplying canyon piston cores. In …

The Effects Of Dredging On The Stability Of An Ebb-Tidal Delta, Lynnhaven Inlet, Virginia, Donald Keith Riggenbach

OES Theses and Dissertations

A channel was dredged in 1965 through the ebb-tidal delta of Lynnhaven Inlet, Virginia. The purpose of this study was to determine if this channel has affected the morphological configuration of the delta. It was proposed that the channel caused the dynamically stable delta to become unstable and change its morphology.

Bathymetric comparisons of seven surveys during the last 122 years, including one conducted during this investigation, show that prior to 1962 and the dredging operations, the delta had become dynamically stable. The present survey shows that the delta has changed its shape in response to the interaction of the …

Biostratigraphy Of The Snowshoe Formation (Jurassic) In The Izee Area, Grant County, Oregon, Paul Lawrence Smith

Dissertations and Theses

Using the standard Jurassic zonal scheme, this work attempts to determine the ages of the four members of the Snowshoe Formation that crop out in the Izee area. As a corollary, regional correlations are possible. The stratigraphic relationship between the Snowshoe Formation, the subjacent Hyde Formation and the superjacent Trowbridge Formation is also investigated.

Over one thousand fossils were collected from five stratigraphic sections and eight localities. The sections were measured using tape and compass techniques and the relative stratigraphic ranges of the fossils calculated using a computer program written specifically for this project. The ammonite fauna, dominated by the …

Rubidium-Strontium And Uranium-Lead Geochronology Of The Northeastern Border Zone Of The Idaho Batholith Bitterroot Range, Montana, Steven E. Tripp

Masters Theses

No abstract provided.