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Articles 451 - 480 of 1093
Full-Text Articles in Stratigraphy
Resource Notes-Academic Year 1994-95
Resource Notes-Academic Year 1994-95
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Guidelines For Decommissioning Water Wells, How To Plug Water Wells, Duane A. Eversoll, Delynn R. Hay, Rod J. Tremblay
Guidelines For Decommissioning Water Wells, How To Plug Water Wells, Duane A. Eversoll, Delynn R. Hay, Rod J. Tremblay
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Annual Outflow And Annual Inflow Of Water From/To Nebraska, 1950-1994, Conservation And Survey Division
Annual Outflow And Annual Inflow Of Water From/To Nebraska, 1950-1994, Conservation And Survey Division
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Structural Contour Map On Top Of The Lansing Group, R. R. Burchett
Structural Contour Map On Top Of The Lansing Group, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Banded Agates, Origins And Inclusions, Roger K. Pabian, Andrejs Zarins
Banded Agates, Origins And Inclusions, Roger K. Pabian, Andrejs Zarins
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Fundamentals Of Groundwater Contamination, Darryll T. Pederson
Fundamentals Of Groundwater Contamination, Darryll T. Pederson
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Environments Of Aeolian Deposition In South-Central Nebraska During The Last Glacial Maximum, Zhao-Dong Feng, William C. Johnson, Robert F. Diffendal Jr.
Environments Of Aeolian Deposition In South-Central Nebraska During The Last Glacial Maximum, Zhao-Dong Feng, William C. Johnson, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
The Peoria loess of south-central Nebraska, deposited approximately during the last Glacial Maximum, can be subdivided into three zones: an upper laminated loess and a lower massive loess, separated by a dark gley zone in which bison bones and spruce charcoal are found. The lower Peoria unit is characterized by high organic matter content, relatively high bulk density, and common root channels. The upper Peoria unit has rhythmic patterns of two orders: strongly gleyed and weakly gleyed zones alternating in couplets about 2-5 m thick, and coarse- and fine-grained laminae of second order, about 2-4 mm thick. The strongly gleyed …
Geomorphic And Structural Features Of The Alliance 1º × 2º Quadrangle, Western Nebraska, Discernible From Synthetic-Aperture Radar Imagery And Digital Shaded-Relief Maps, Robert F. Diffendal Jr.
Geomorphic And Structural Features Of The Alliance 1º × 2º Quadrangle, Western Nebraska, Discernible From Synthetic-Aperture Radar Imagery And Digital Shaded-Relief Maps, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
The digital shaded-relief map of the United States and the synthetic-aperture radar map of the Alliance Nebraska 1º x 2º area prepared by the U.S. Geological Survey (USGS) in the former case and for the USGS in the latter show oriented landforms and lineaments in northwest Nebraska. Parallel and subparallel hills and valleys developed on different geologic materials ranging from shales through sandstones to loess and eolian sand appear to be wind erosional features subsequently modified by running water. The long axes of these hills and valleys generally trend between N40"W and N50"W. Similar features also occur across major areas …
Directory Of Nebraska Quarries, Pits, And Mines, R. R. Burchett
Directory Of Nebraska Quarries, Pits, And Mines, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Resource Notes-Academic Year 1993-94
Resource Notes-Academic Year 1993-94
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Groundwater-Level Changes In Nebraska, 1992, Gregory V. Steele, Perry B. Wigley
Groundwater-Level Changes In Nebraska, 1992, Gregory V. Steele, Perry B. Wigley
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Location Of Registered Irrigation Wells In Nebraska As Of 1994
Location Of Registered Irrigation Wells In Nebraska As Of 1994
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Resource News-Spring 1994
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Resource News-Summer 1994
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Nebraska Mineral Operations Review, 1993, Raymond R. Burchett, Duane A. Eversoll
Nebraska Mineral Operations Review, 1993, Raymond R. Burchett, Duane A. Eversoll
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
A Field Trip To The Sand Hills Of Nebraska May 4-6, 1994
A Field Trip To The Sand Hills Of Nebraska May 4-6, 1994
Conservation and Survey Division: Faculty and Staff Publications
The Sand Hills of central Nebraska, covering over 50,000 sq km (19,300 sq miles) constitute a unique physiographic, geologic and hydrologic province in the United States.
Cass County Test Hole Logs, Raymond R. Burchett, Frank A. Smith
Cass County Test Hole Logs, Raymond R. Burchett, Frank A. Smith
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Clay County Test Hole Logs, Raymond R. Burchett
Clay County Test Hole Logs, Raymond R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Probable Glacial Climatic Conditions In Source Areas During Deposition Of Parts Of The Ash Hollow Formation, Ogallala Group (Late Tertiary), Of Western Nebraska, Patricia E. Helland, Robert F. Diffendal Jr.
Probable Glacial Climatic Conditions In Source Areas During Deposition Of Parts Of The Ash Hollow Formation, Ogallala Group (Late Tertiary), Of Western Nebraska, Patricia E. Helland, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Evidence of the climatic conditions in the mountain sediment source areas for the late Tertiary Ash Hollow Formation of the Ogallala Group in western Nebraska has been sought in an SEM (scanning electron microscope) study of surface features on detrital quartz grains from these deposits. The following lines of indirect evidence raised the possibility of glacial conditions: uplift of up to 3500 m in the source areas, paleohydrologic parameters indicative of a transport system analogous to the modern North Saskatchewan River, and possible cold climate surface features on cobbles from the deposits. SEM analysis shows that five of the nine …
Geology, Geologic Time And Nebraska, Marvin P. Carlson
Geology, Geologic Time And Nebraska, Marvin P. Carlson
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Information And Regulations Pertaining To Industrial Minerals In Nebraska, Raymond R. Burchett
Information And Regulations Pertaining To Industrial Minerals In Nebraska, Raymond R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Understanding Groundwater Starts With The Rocks: Geologic Fralnework, Groundwater Occurrence And Irrigation Development In Nebraska, Robert F. Diffendal Jr.
Understanding Groundwater Starts With The Rocks: Geologic Fralnework, Groundwater Occurrence And Irrigation Development In Nebraska, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Nebraska is blessed with abundant groundwater. This groundwater is found beneath much of the state, principally in the sediments and sedimentary rocks that blanket the ancient and largely crystalline rocks geologists call Precambrian (see block diagram of Nebraska's geology, p. 50). These younger deposits contain pieces of evidence such as fossils and sedimentary features that reveal the tremendous changes in the environment that have gone on over the last 570 million years, during which these deposits accumulated. Change is the name of the game in geologic history, just as it is in human history. Fundamental changes in geologic history across …
Profiles: Nelson Horatio Darton: His Surveys Laid The Foundation, Robert F. Diffendal Jr.
Profiles: Nelson Horatio Darton: His Surveys Laid The Foundation, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
No serious researcher studying the development of water resources in Nebraska, or for that matter in the central Great Plains, can overlook the works of Nelson Horatio Darton, the first geologist to study and publish about those resources in any detail. Darton originally published the names and characteristics of many hydrogeologic units beneath much of Nebraska, now used by groups as diverse as scientists, well drillers and the general public. These works are listed below. As an indication of the value of these early efforts, I have used these works for my research and can testify to their accuracy and …
Flat Water: A History Of Nebraska And Its Water, Robert D. Kuzelka, Charles A. Flowerday, Robert N. Manley, Bradley C. Rundquist, Sally J. Herrin
Flat Water: A History Of Nebraska And Its Water, Robert D. Kuzelka, Charles A. Flowerday, Robert N. Manley, Bradley C. Rundquist, Sally J. Herrin
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
The Origin And Evolution Of The Southern Snake Range Decollement, East Central Nevada, Allen J. Mcgrew
The Origin And Evolution Of The Southern Snake Range Decollement, East Central Nevada, Allen J. Mcgrew
Department of Earth, Environment and Sustainability Faculty Publications
Regional and local stratigraphic, metamorphic, and structural constraints permit reconstruction of the southern Snake Range extensional deformational system in east central Nevada. The dominant structure of the range, the southern Snake Range décollement (SSRD), operated during Oligocene and Miocene extensional deformation to exhume a footwall of multiply deformed metasedimentary and plutonic rocks. Intrusion of three plutons (∼160 Ma, 79.1 ± 0.5 Ma, and 36 ± 1 Ma, respectively) and development of two cleavages preceded the onset of extensional deformation. Plastic deformation of lower plate metasedimentary rocks accompanied the early phases of regional extension and produced bedding-parallel grain shape foliations and …
Application Of Sealevel Stratigraphy To Neogene Great Plains Stratigraphy, Robert F. Diffendal Jr., A. Lowrie
Application Of Sealevel Stratigraphy To Neogene Great Plains Stratigraphy, Robert F. Diffendal Jr., A. Lowrie
Robert F. Diffendal, Jr., Publications
Absolute-dated high frequency (Milankovitch cycles) marine climate/sealevel oscillatory stratigraphy can be correlated generally with continental stratigraphies. Improvements in absolute dating of Neogene formations across the North American Great Plains make this a candidate area in which to correlate marine and continental stratigraphies. Mid-latitude continental areas respond directly to climate variations. During glaciated/ cold climates, sealevel lowering results in steepened river gradients, increased erosion all along the river channel, and larger stress-bed loads. This, combined with glacial catastrophic flooding, produces greater cut-and-fill sequences along river systems than crevasse splays along the emergent coastal plain, deltas along the shelf, and submarine fans …
Uranium Deposits In Nebraska, R. R. Burchett
Uranium Deposits In Nebraska, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Geology Of Arbor Day Farm Nebraska City, Nebraska, R. R. Burchett
Geology Of Arbor Day Farm Nebraska City, Nebraska, R. R. Burchett
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Resource News-March/April 1993
Resource News-March/April 1993
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Nebraska Mineral Operations Review, 1992, R. R. Burchett, Duane A. Eversoll
Nebraska Mineral Operations Review, 1992, R. R. Burchett, Duane A. Eversoll
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.