Geology Commons^™

Groundwater-Level Changes In Nebraska, 1991, Gregory V. Steele, Perry B. Wigley

Conservation and Survey Division

No abstract provided.

Stable Isotope Composition Of Calcareous Paleosols And Ground-Water Cements From The Ogallala Group (Neogene), Western Nebraska, Leonard Robert Gardner, Robert F. Diffendal Jr., Douglas F. Williams

Robert F. Diffendal, Jr., Publications

A preliminary survey has been made of the stable isotope composition of secondary carbonates in the Ogallala Group of western Nebraska. The purpose of the study was to ascertain whether the isotopic signatures of calcareous paleosols in the fine grained facies of the Ogallala and groundwater cements in gravel facies might provide a basis for stratigraphic correlation and/or paleoclimatic interpretation.

The groundwater cemented channel gravels are modestly depicted in IRO (δ¹⁸O = –10‰) as compared to calcareous paleo'sols (δ¹⁸O = –8.0 to –9.0‰). Gravels of different age, however, have essentially identical isotopic signatures. The isotopic variability …

Hydrogeology Of Parts Of The Twin Platte And Middle Republican Natural Resources Districts, Southwestern Nebraska, J. W. Goeke, J. M. Peckenpaugh, R. E. Cady, J. T. Dugan, R. A. Engberg

Conservation and Survey Division

No abstract provided.

Groundwater Levels In Nebraska, 1991, Gregory V. Steele, Perry B. Wigley

Conservation and Survey Division

No abstract provided.

Greeley County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

Nebraska Mineral Operations Review, 1991, R. R. Burchett, Duane A. Eversoll

Conservation and Survey Division

No abstract provided.

Solid Waste Management In Seismic Impact Zones, Raymond R. Burchett

Conservation and Survey Division

No abstract provided.

Sr-Isotope Record Of Quaternary Marine Terraces On The California Coast And Off Hawaii, Kenneth R. Ludwig, Daniel R. Muhs, Kathleen R. Simmons, James G. Moore

United States Geological Survey: Staff Publications

Strontium-isotopic ratios of dated corals have been obtained from submerged reefs formed during Quaternary glacial periods off the Hawaiian islands. These data, combined with data from deep-sea sediments, tightly constrain the secular variation of marine ⁸⁷Sr/⁸⁶Sr for the past 800,000 yr. Although long-term trends are apparent, no significant (>0.02‰), rapid (<100,000 yr) excursions in ⁸⁷Sr/⁸⁶Sr were resolved nor did we observe any samples with ⁸⁷Sr/⁸⁶Sr greater than that of modern seawater. Strontium in mollusks from elevated marine terraces formed during interglacial periods on the southern California coast show resolvable and consistent variations in …

Aminostratigraphy And Oxygen Isotope Stratigraphy Of Marine Terrace Deposits Palos Verdes Hills And San Pedro Areas Los Angeles County California, Daniel R. Muhs, Gifford H. Miller, Joseph F. Whelean, George L. Kennedy

United States Geological Survey: Staff Publications

Amino acid and oxygen isotope data for fossils from terraces of the Palos Verdes Hills and San Pedro areas in Los Angeles County California shed new light on the ages of terraces sea level history marine paleotemperatures and late Quaternary tectonics in this region Low terraces on the Palos Verdes peninsula correlate with the 80 ka and 125 ka sea level highstands that are also recorded as terraces on other coasts In San Pedro the Palos Verdes sand the deposit on what is mapped as the first terrace by Woodring and others 1946 was previously thought to be a single …

The Last Interglacial-Glacial Transition In North America: Evidence From Uranium-Series Dating Of Coastal Deposits, Daniel R. Muhs

United States Geological Survey: Staff Publications

Considerable uncertainty exists as to whether the last interglacial was relatively "short" (~10 ka) or "long" (-20-60 ka), although most investigators generally agree that the last interglacial correlates with all or part of deep-sea oxygen-isotope stage 5. A compilation of reliable U-series ages of marine terrace corals from deposits that have been correlated with isotope stage 5 indicates that there were three relatively high sea-level stands at ca 125-120 ka, ca. 105 ka, and ca. 85-80 ka, and these ages agree with the times of high sea level predicted by the Milankovitch orbital-forcing theory. At a number of localities, however, …

Wheeler County Test Hole Logs, Raymond R. Burchett

Conservation and Survey Division

No abstract provided.

Resource News-January/February 1992

Conservation and Survey Division

No abstract provided.

Mineral Resource Map Of Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Groundwater-Level Changes In Nebraska, Predevelopment To Fall 1992, Conservation Survey Division, U.S. Geological Survey

Conservation and Survey Division

No abstract provided.

Dixon County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

Nance County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

Boone County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division

No abstract provided.

Resource Notes-Academic Year 1991-92

Conservation and Survey Division

No abstract provided.

Resource News-March/April 1992

Conservation and Survey Division

No abstract provided.

Resource News-May/June 1992

Conservation and Survey Division

No abstract provided.

Resource News-July/August 1992

Conservation and Survey Division

No abstract provided.

Geologic Bedrock Map Of Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Description Of Rocks From A Core Drilled At A Potential Low-Low Level Radioactive Waste Site In Nemaha County, R. R. Burchett

Conservation and Survey Division

No abstract provided.