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Articles 26341 - 26370 of 29958
Full-Text Articles in Geology
Origins And Characteristics Of The Basin-Centered Continuous-Reservoir Unconventional Oil-Resource Base Of The Bakken Source System, Williston Basin, Leigh C. Price
Leigh Price Papers
This paper contains valuable, comprehensive information about the potential oil resources in the Bakken Formation within the Williston Basin of eastern Montana and western North Dakota. The paper represents work as it stood at the time of Leigh Price’s death.
Type Locality For The Great Blue Limestone In The Bingham Nappe, Oquirrh Mountains, Utah, United States Geological Survey
Type Locality For The Great Blue Limestone In The Bingham Nappe, Oquirrh Mountains, Utah, United States Geological Survey
All U.S. Government Documents (Utah Regional Depository)
The Great Blue Limestone was named originally by Spurr (1895) from exposures near the Mercur mining district in the Oquirrh Mountains, Utah. The formation was described in greater detail by Gilluly (1932) in the Ophir mining district. Neither formally established a type locality for this formation in the Oquirrh Mountains. However, the formation has since been correlated broadly with similar sedimentary rocks elsewhere in the adjoining Rocky Mountains and Great Basin regions. For the record, and to assist future correlations, a type measured section of the Great Blue Limestone in the Oquirrh Mountains is located, described, and a detailed measured …
Principal Meridians Of The Federal System Of Rectangular Surveys, Bureau Of Land Management
Principal Meridians Of The Federal System Of Rectangular Surveys, Bureau Of Land Management
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Land Cover Trends Dataset, 1973–2000, Christopher E. Soulard, William Acevedo, Roger F. Auch, Terry L. Sohl, Mark A. Drummond, Benjamin M. Sleeter, Daniel G. Sorenson, Steve Kambly, Tamara S. Wilson, Janis L. Taylor, Kristi L. Sayler, Michael P. Stier, Christopher A. Barnes, Steve C. Methven, Thomas R. Loveland, Rachel Headley, Mark S. Brooks
Land Cover Trends Dataset, 1973–2000, Christopher E. Soulard, William Acevedo, Roger F. Auch, Terry L. Sohl, Mark A. Drummond, Benjamin M. Sleeter, Daniel G. Sorenson, Steve Kambly, Tamara S. Wilson, Janis L. Taylor, Kristi L. Sayler, Michael P. Stier, Christopher A. Barnes, Steve C. Methven, Thomas R. Loveland, Rachel Headley, Mark S. Brooks
United States Geological Survey: Publications
The U.S. Geological Survey Land Cover Trends Project is releasing a 1973–2000 time-series land-use/land-cover dataset for the conterminous United States. The dataset contains 5 dates of land-use/land-cover data for 2,688 sample blocks randomly selected within 84 ecological regions. The nominal dates of the land-use/land-cover maps are 1973, 1980, 1986, 1992, and 2000. The land-use/land-cover maps were classified manually from Landsat Multispectral Scanner, Thematic Mapper, and Enhanced Thematic Mapper Plus imagery using a modified Anderson Level I classification scheme. The resulting land-use/land-cover data has a 60-meter resolution and the projection is set to Albers Equal-Area Conic, North American Datum of 1983. …
Hayes County Test Hole Logs, Duane A. Eversoll
Hayes County Test Hole Logs, Duane A. Eversoll
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Multibeam Sonar Backscatter Lineaments And Anthropogenic Organic Components In Lacustrine Silty Clay, Evidence Of Shipping In Western Lake Ontario, C F Michael Lewis, L A. Mayer, Prasanta K. Mukhopadhyay, Michael A. Kruge, John P. Coakley, M D. Smith
Multibeam Sonar Backscatter Lineaments And Anthropogenic Organic Components In Lacustrine Silty Clay, Evidence Of Shipping In Western Lake Ontario, C F Michael Lewis, L A. Mayer, Prasanta K. Mukhopadhyay, Michael A. Kruge, John P. Coakley, M D. Smith
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works
A multibeam sonar survey (95 kHz) covering more than 500 km2 of western Lake Ontario revealed anomalous lineaments of relatively high backscatter. The lineaments did not align with or parallel the most prominent structural zones beneath the lake as expected. Instead, the principal lineaments lay on lines between ports on opposite sides of the lake, especially between Toronto and Welland Canal, and Toronto and Niagara River mouth. As the lineaments underlie current and historical shipping routes used during the steamship era, they are interpreted as an acoustic response to shipping debris cumulated in the near-surface bottom sediment. An exploratory …
Effects Of Longwall Mining On Hydrology, Leslie County, Kentucky Part 2: During-Mining Conditions, Shelley Minns Hutcheson, James A. Kipp, James S. Dinger, Lyle V.A. Sendlein, Daniel I. Carey, Gregory L. Secrist
Effects Of Longwall Mining On Hydrology, Leslie County, Kentucky Part 2: During-Mining Conditions, Shelley Minns Hutcheson, James A. Kipp, James S. Dinger, Lyle V.A. Sendlein, Daniel I. Carey, Gregory L. Secrist
Report of Investigations--KGS
The effects of longwall coal mining on hydrology in the Eastern Kentucky Coal Field are being investigated. The study area is in the Edd Fork watershed in southern Leslie County, over Shamrock Coal Company's Beech Fork Mine. Longwall panels approximately 700 ft wide are separated by three-entry gateways that are approximately 200 ft wide. The mine is operated in the Fire Clay (Hazard No. 4) coal; overburden thickness ranges from 300 to 800 ft. Mining began in panel 1 in September 1991 and concluded with panel 8 in September 1994. Long-term monitoring consisting of a network of piezometers and time-domain …
Resource News-Spring 2000
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Carbonate Deposition And Sequence Stratigraphy Of The Terminal Cambrian Grand Cycle In The Southern Appalachians, U.S.A, Bosiljka Glumac, Kenneth R. Walker
Carbonate Deposition And Sequence Stratigraphy Of The Terminal Cambrian Grand Cycle In The Southern Appalachians, U.S.A, Bosiljka Glumac, Kenneth R. Walker
Geosciences: Faculty Publications
The cessation of shale and carbonate deposition of the Conasauga Group grand cycles (Middle to Upper Cambrian) and the establishment of the widespread peritidal carbonate deposition of the Knox Group (Upper Cambrian to Lower Ordovician) represent a prominent change in sedimentation along the early Paleozoic passive continental margin in the southern Appalachians. To evaluate the causes for this change, this study focuses on the Maynardville Formation, which is the uppermost carbonate unit of the Conasauga Group. The Maynardville consists of: (1) a lower subtidal faciès succession, which is underlain by the Nolichucky Shale and resembles the rest of the Conasauga …
Groundwater-Level Changes In Nebraska Predevelopment To 1954, University Of Nebraska - Lincoln
Groundwater-Level Changes In Nebraska Predevelopment To 1954, University Of Nebraska - Lincoln
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Buffalo County Test Hole Logs, Vincent H. Dreeszen
Buffalo County Test Hole Logs, Vincent H. Dreeszen
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Coal Resources Of The Lower Elkhorn Coal Bed In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, William M. Andrews Jr., John K. Hiett
Coal Resources Of The Lower Elkhorn Coal Bed In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, William M. Andrews Jr., John K. Hiett
Map and Chart--KGS
This chart is one of a series that shows the regional characteristics of the Lower Elkhorn coal. The maps were prepared as part of the U.S. Geological Survey's Natural Coal Assessment Program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. The Lower Elkhorn coal is one of the leading producers in the state of Kentucky and has, in some areas, a reputation as an excellent metallurgical-grade coal. It is known locally as the Pond Creek, Imboden, Path Fork, Blue Gem, Straight Creek, Bruin or Vires coal bed. This …
Mining Geology Of The Lower Elkhorn Coal, Stephen F. Greb, Gerald A. Weisenfluh
Mining Geology Of The Lower Elkhorn Coal, Stephen F. Greb, Gerald A. Weisenfluh
Map and Chart--KGS
The Lower Elkhorn (and its equivalents) is one of the leading producers of coal in the Eastern Kentucky Coal Field with 12 to 18 million short tons of annual production between 1974 and 1996, according to the Kentucky Department of Mines and Minerals. Stratigraphically, the coal occurs in the lower part of the Pikeville Formation of the Breathitt Group (Fig. 1), which was previously part of the Breathitt Formation (Chesnut, 1992). The coal occurs from 150 to 300 ft above the base of a thick coarsening-upward sequence containing the Betsie Shale and from 250 to 450 ft beneath the base …
Coal Resources Of The Springfield Coal Bed In Western Kentucky, William M. Andrews Jr., Robert E. Andrews, John K. Hiett
Coal Resources Of The Springfield Coal Bed In Western Kentucky, William M. Andrews Jr., Robert E. Andrews, John K. Hiett
Map and Chart--KGS
Historically, the Springfield (Western Kentucky No. 9) coal bed has been the leading source of production in the Western Kentucky Coal Field. The Springfield coal is known for its lateral continuity in terms of both thickness and coal quality. It is estimated to have the largest original and remaining resource in the Western Kentucky Coal Field (Greb and others, 1992).
Total Coal Thickness Of The Fire Clay And Fire Clay Rider Coals In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, Stephen F. Greb, Jeffery A. Esterle
Total Coal Thickness Of The Fire Clay And Fire Clay Rider Coals In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, Stephen F. Greb, Jeffery A. Esterle
Map and Chart--KGS
This map is one of a series that shows the regional characteristics of the Fire Clay coal zone. The maps were prepared as part of the U.S. Geological Survey's National Coal Assessment Program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. Within the zone, the Fire Clay coal is the most economically important bed and is one of the leading producers in the state of Kentucky. It is known for a persistent flint-clay parting that is believed to be of volcanic origin. This map represents the total coal …
Coal Resources Of The Upper Elkhorn No. 3b Coal (Upper Bed) In Eastern Kentucky, Jeffery A. Esterle, Ernest E. Thacker, Gerald A. Weisenfluh, John K. Hiett
Coal Resources Of The Upper Elkhorn No. 3b Coal (Upper Bed) In Eastern Kentucky, Jeffery A. Esterle, Ernest E. Thacker, Gerald A. Weisenfluh, John K. Hiett
Map and Chart--KGS
This chart is one of a series that shows the regional characteristics of the Upper Elkhorn No. 3 coal zone. The maps and charts were prepared as part of the U.S. Geological Survey's National Coal Assessment Program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. The Upper Elkhorn No. 3 coal zone has been one of the leading producers in the state of Kentucky and, in some areas, is of very high quality. Bed stratigraphy within the Upper Elkhorn No. 3 zone and thickness of the No. 3A …
Mapped Karst Ground-Water Basins In The Bowling Green 30 X 60 Minute Quadrangle, Joseph A. Ray, James C. Currens
Mapped Karst Ground-Water Basins In The Bowling Green 30 X 60 Minute Quadrangle, Joseph A. Ray, James C. Currens
Map and Chart--KGS
This map shows karst ground-water basins in the Bowling Green quadrangle, determined primarily by ground-water tracer studies. It can be used to quickly identify the ground-water basins and springs to which a site may drain. Major springs and the relative size of their catchment areas can be evaluated for potential as water supplies. The map also serves as a geographic index to literature on karst ground water in the area.
Nebraska Information, Oregon Trail, Station Sites, University Of Nebraska - Lincoln
Nebraska Information, Oregon Trail, Station Sites, University Of Nebraska - Lincoln
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Small-Scale Variability Of Groundwater-Lake Interaction At Shingobee Lake, Minnesota, Hans F. Kishel
Small-Scale Variability Of Groundwater-Lake Interaction At Shingobee Lake, Minnesota, Hans F. Kishel
Theses and Dissertations
Groundwater discharge is an important contributor to the water budget of a lake. The variability of hydraulic parameters of lake and groundwater systems causes difficulties in estimating the contribution of groundwater to a lake water budget. This study attempts to show that amount of variability for a small portion of the lake and shore (8 x 15 meter section, starting approximately five meters from shore and extending nine meters into the lake).
Piezometers were installed at a depth of one half and one meter in nests at 70 locations in the rectangular study site. Water levels were collected from the …
Oxygen Isotopes And Metolachlor Residues In Water Samples From A Portion Of The Canajoharie Creek Watershed, Central New York, John M. Nadeau
Oxygen Isotopes And Metolachlor Residues In Water Samples From A Portion Of The Canajoharie Creek Watershed, Central New York, John M. Nadeau
Geology Theses and Dissertations
Increased ground and surface water contamination has fueled the need for a better understanding of factors affecting hydrogeological settings. Seasonal variability in the recharge of an aquifer can affect the rate and amount of contamination that can occur. Stable isotopes have been previously investigated as tracers to determine flow paths of the water and contaminants. In this study, oxygen isotopes were used to determine the factors that influence seasonal variations in ground and surface water, such as well location, aquifer type, surface water sites, and soil type. Samples were collected from different locations around the Canajoharie Field Site, including wells …
Dating Marine Terraces With Relative-Age And Correlated-Age Methods, Daniel R. Muhs
Dating Marine Terraces With Relative-Age And Correlated-Age Methods, Daniel R. Muhs
United States Geological Survey: Staff Publications
Coastal landforms, and particularly emergent marine terraces, a re amongt he most importantg eomorphicfe aturesi n studieso f Quaternarys eal evel fluctuationsa nd neotectonics. A general model, first articulated by Alexander (1953) and borne out by detailedr ecent studieso n many coastlinesi,s that emergent flights of erosional terraces and coral reefs (Fig. 1) are the resulto f glacioeustaticallyc ontrolledf luctuations of global sea level superimposed on steady uplift. Similiarity of U-series ages of coral from both constructional reefsi n the tropicsa nd erosionalt erracesi n midlatitudesh as provided a rigorous test of this model (Mesolella and others, 1969; Bloom and …
Mining Geology Of Coals In Western Kentucky, Stephen F. Greb, David A. Williams
Mining Geology Of Coals In Western Kentucky, Stephen F. Greb, David A. Williams
Map and Chart--KGS
Each of the most heavily mined coal seams in the Western Kentucky Coal Field, as indicated by analyses, mine visits, and discussions with mine inspectors and engineers, has its own roof and floor characteristics. Also, because roof rocks above several of the seams are laterally continuous (especially in the Carbondale Formation), roof characteristics related to rock type are often widespread and continuous between mines. This chart discusses the mining geology of three western Kentucky coal beds, highlighted on the stratigraphic column shown in Figure 1.
Additional mining obstacles that can affect all coal beds and roof strata are (1) tectonic …
Quality Characteristics Of The Springfield Coal In Western Kentucky, Cortland F. Eble
Quality Characteristics Of The Springfield Coal In Western Kentucky, Cortland F. Eble
Map and Chart--KGS
Thickness and quality data from the Kentucky Coal Resources Information System (KCRIS) for the Springfield coal bed are summarized in this chart. Parameter averages and range of values are presented in the two tables, and average values are displayed graphically by county.
Regional Subsurface Geologic Cross Sections Of The Mississippian System, Appalachian Basin, Eastern Kentucky, David C. Harris, Thomas N. Sparks
Regional Subsurface Geologic Cross Sections Of The Mississippian System, Appalachian Basin, Eastern Kentucky, David C. Harris, Thomas N. Sparks
Map and Chart--KGS
This series of 14 regional cross sections illustrates subsurface stratigraphic correlations of Mississippian (upper Carboniferous) rocks in the Appalachian Basin of eastern Kentucky. These cross sections were constructed as part of a regional stratigraphic study of the Mississippian "Big Lime," a major oil- and gas-producing formation. The series illustrates 10 dip-oriented and 4 strike-oriented lines, extending from the Slade Formation outcrop belt on the northwest, to the state borders on the east and south. Stratigraphic and structural versions are shown for each section to better illustrate thickness and structural variations. These cross sections served as the regional framework during collection …
Quality Characteristics Of The Lower Elkhorn Coal Bed In Eastern Kentucky, Cortland F. Eble
Quality Characteristics Of The Lower Elkhorn Coal Bed In Eastern Kentucky, Cortland F. Eble
Map and Chart--KGS
Thickness and quality data from the Kentucky Coal Resources Information System (KCRIS) are summarized in this chart for the Lower Elkhorn coal bed (and equivalents). Parameter averages and ranges of values are presented in the two tables, and average values are displayed graphically by county.
Geologic Map Of Kentucky, Garland R. Dever Jr., M. C. Noger
Geologic Map Of Kentucky, Garland R. Dever Jr., M. C. Noger
Map and Chart--KGS
This map shows the geologic age of rocks and sediments at the surface in Kentucky. Sedimentary rocks, deposited from about 465 to 290 million years ago during the Ordovician, Silurian, Devonian, Mississippian, and Pennsylvanian Periods, crop out across the state. The rocks mainly consist of shale, limestone, sandstone, and siltstone. As shown in the cross sections, these surface rocks are underlain by older unexposed rocks of Precambrian, Cambrian, and Ordovician age.
Small bodies of igneous rocks were intruded into the state's bedrock about 270 million years ago during the Permian Period. They crop out in Elliott County of northeastern Kentucky, …
Generalized Geologic Bedrock Conditions As Related To Solid-Waste Landfills In Kentucky, Martin C. Noger
Generalized Geologic Bedrock Conditions As Related To Solid-Waste Landfills In Kentucky, Martin C. Noger
Map and Chart--KGS
This map is not intended to be used for selecting individual landfill sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions throughout the state that affect the selection of solid-waste disposal sites.
Coal Resources Of The Fire Clay Coal Zone In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, Jeffery A. Esterle, Stephen F. Greb, John K. Hiett
Coal Resources Of The Fire Clay Coal Zone In Eastern Kentucky, Ernest E. Thacker, Gerald A. Weisenfluh, Jeffery A. Esterle, Stephen F. Greb, John K. Hiett
Map and Chart--KGS
This chart is one of a series that shows the regional characteristics of the Fire Clay coal zone. The maps and charts were prepared as part of the U.S. Geological Survey's National Coal Assessment Program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. Within this coal zone, the Fire Clay coal is the most economically important bed and is one of the leading producers in the state of Kentucky. The Fire Clay coal contains a flint-clay parting that is believed to be of volcanic origin. The widespread occurrence …
Total Coal Thickness Of The Upper Elkhorn No. 3a Coal (Lower Bed) In Eastern Kentucky, Jeffery A. Esterle, Ernest E. Thacker, Gerald A. Weisenfluh
Total Coal Thickness Of The Upper Elkhorn No. 3a Coal (Lower Bed) In Eastern Kentucky, Jeffery A. Esterle, Ernest E. Thacker, Gerald A. Weisenfluh
Map and Chart--KGS
This map is one of a series that shows the regional characteristics of the Upper Elkhorn No. 3 coal zone. The maps were prepared as part of the U.S. Geological Survey's National Coal Assessment Program, which compiles regional maps and databases that provide a comprehensive assessment of the most important coal beds in the nation. The Upper Elkhorn No. 3 coal zone has been one of the leading producers in the state of Kentucky and, in some areas, contains very high-quality coal. The zone is composed of a number of distinct coal beds that merge in some areas to form …
Effects Of Longwall Mining On Hydrogeology, Leslie County, Kentucky Part 3: Post-Mining Conditions, Shelley Minns Hutcheson, James A. Kipp, James S. Dinger, Daniel I. Carey, Lyle V.A. Sendlein, Gregory L. Secrist
Effects Of Longwall Mining On Hydrogeology, Leslie County, Kentucky Part 3: Post-Mining Conditions, Shelley Minns Hutcheson, James A. Kipp, James S. Dinger, Daniel I. Carey, Lyle V.A. Sendlein, Gregory L. Secrist
Report of Investigations--KGS
The effects of longwall coal mining on hydrology in the Eastern Kentucky Coal Field have been investigated since 1991. The study area is in the Edd Fork watershed in southern Leslie County, over Shamrock Coal Company's Beech Fork Mine. Longwall panels approximately 700 ft wide are separated by three-entry gateways that are approximately 200 ft wide. The mine is operated in the Fire Clay (Hazard No. 4) coal; overburden thickness ranges from 300 to 800 ft. Mining began in panel 1 in September 1991 and concluded with panel 8 in September 1994. Long-term monitoring consisting of a network of piezometers …