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Articles 4021 - 4050 of 4538

Full-Text Articles in Earth Sciences

A New Species Of Menoceras From The Marsland Formation Of Nebraska, Lloyd G. Tanner Jul 1972

A New Species Of Menoceras From The Marsland Formation Of Nebraska, Lloyd G. Tanner

Bulletin of the University of Nebraska State Museum (1924–2023)

Further study indicates that the Menoceras remains collected from the "Bridgeport Quarries" (lower port:on or the Marsland Formation, Middle Miocene, of the Hemingford Group) are of a new species.

In 1962, these dicerathere remains were considered to be a geologic variety of Diceratherium niobrarensis (Stecher, Schultz, and Tanner). However, later (Tanner, 1969) a generic distinction was revived, separating the Menoceras Troxell from Diceratherium Marsh. Diceretherium niobrarensis was then placed in synonymy with Menoceras arikarense (Barbour).

The new species is an intermediate between Menoceras arikarense (Barbour) from the Harrison Formation and Menoceras marslandensis Tanner, from the upper portion of the Marsland …


Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin Jul 1972

Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin

Bulletin of the University of Nebraska State Museum (1924–2023)

A new species (Lynx stouti) of small felid is described from the lower Pliocene of Colorado. This form has several characters in common with the modern Lynx and may be ancestral to that genus. A new subspecies of Lynx issiodorensis Croizet and Jobert is described as L. i. kurteni from the Mullen Assemblage, Cherry County, Nebraska. The relationships of this form to other lynxes are discussed along with the paleo-distribution of the genus.

The classification of the felinae has always been somewhat controversial, especially at the generic level. One fairly homogenous group of cats which has been separated …


Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin Jun 1972

Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin

Bulletin of the University of Nebraska State Museum (1924–2023)

Evolutionary trends in certain carnivores, rodents, bovids, and proboscideans are examined. Chronoclines are demonstrated for muskrats, beavers, mammoths, and bison. The Pliocene-Pleistocene boundary and Quaternary climatic fluctuations are also discussed.

The University of Nebraska State Museum contains a large stratigraphically controlled collection of Pleistocene animals. This collection provides a unique opportunity for the study of phyletic trends in certain lineages of mammals. Although a few phylogenetic lineages have been proposed (Schultz and Frankforter, 1946; Hibbard, et al., 1965), this has not been done for the vast majority of Pleistocene mammals. However, there is much more data available than this would …


The Microtine Rodents Of The Mullen Assemblage From The Pleistocene Of North Central Nebraska, Larry D. Martin May 1972

The Microtine Rodents Of The Mullen Assemblage From The Pleistocene Of North Central Nebraska, Larry D. Martin

Bulletin of the University of Nebraska State Museum (1924–2023)

The University of Nebraska State Museum has had an active collecting program in Hooker and Cherry counties, Nebraska, since the 1930's. The following University of Nebraska State Museum collecting localities have been extensively excavated: Cr-10, Cr-102, Cr-11, Ho-101, Ho-102, and Ho-103. These localities have produced a large vertebrate fauna described by Jakway as the Mullen Local Fauna which he considered for the most part to be Early lllinoian. Further study of this local fauna now demonstrates that assemblage does include Early as well as Middle Pleistocene animals. The purpose of this paper is to report on the evidence regarding the …


Use Of Groundwater For Irrigation In Clay County, Nebraska, 1970, Eugene K. Steele Jr. May 1972

Use Of Groundwater For Irrigation In Clay County, Nebraska, 1970, Eugene K. Steele Jr.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Groundwater Levels In Nebraska, 1971, C.F. Keech May 1972

Groundwater Levels In Nebraska, 1971, C.F. Keech

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Availability And Use Of Water In Nebraska, 1970, F. Butler Shaffer Mar 1972

Availability And Use Of Water In Nebraska, 1970, F. Butler Shaffer

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon Feb 1972

Eutrophication Factors In North Central Florida Lakes, H. D. Putnam, Patrick L. Brezonik, Earl E. Shannon

United States Environmental Protection Agency: Publications

A small Florida lake has been receiving a regimen of nutrient addition equivalent to 500 mg/m3-yr N and 43 mg/m3-yr P since 1967. Data has been accumulated through 1969. The effect on the lacustrine ecosystem of various biogenes includes production by primary producers, species diversity of plankton and certain production estimates at the secondary trophic level using natural populations of planktivorous fish. Plankton production using isotopic carbon is ca. 58 grms/m2-yr; Species diversity is slowly changing to a mixed chlorophycean and yellow-green. Biomass of benthic green filamentous types has increased slightly. Nutrient addition has …


Upper Pennsylvanian Shoreline Deposits Form Iowa And Nebraska: Their Recognition, Variation, And Significance, J. A. Fagerstrom, R. R. Burchett Feb 1972

Upper Pennsylvanian Shoreline Deposits Form Iowa And Nebraska: Their Recognition, Variation, And Significance, J. A. Fagerstrom, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


An Argument For The Open Ocean Siting Of Coastal Thermal Electric Plants, Clarence M. Tarzwell Jan 1972

An Argument For The Open Ocean Siting Of Coastal Thermal Electric Plants, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

A great deal of research is yet to be done before we will definitely know all the effects of thermal electric generating plants. It is evident, however, that the chlorination of the intake water is definitely lethal to a high percentage of planktonic and other organisms; that thermal shock is detrimental to some of the more sensitive forms; that the continued exposure to high temperatures after thermal shock is lethal to many forms, especially the zooplankton; that the screening and turbulence in such plants is lethal to larval fishes and several invertebrates, and that immense amounts of waters are put …


Steller's Sea Cow In Pleistocene Interglacial Beach Deposits On Amchitka, Aleutian Isknds, L. M. Gard Jr., G. E. Lewis, Frank C. Whitmore Jr. Jan 1972

Steller's Sea Cow In Pleistocene Interglacial Beach Deposits On Amchitka, Aleutian Isknds, L. M. Gard Jr., G. E. Lewis, Frank C. Whitmore Jr.

United States Geological Survey: Staff Publications

The first discovery of Steller's Sea Cow (Hydrodamalis) in place in Pleistocene deposits has been made in interglacial beach sand and gravel 35 m above present sea level on Amchitka, Aleutian Islands. Uranium series dating of the bone indicates that it is about 135,000 yrs old.


Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1972 Jan 1972

Total Number Of Irrigation Wells Located In Nebraska Counties As Of 1972

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Interbasin Water Transfers And Groundwater Regulation In Nebraska, D. D. Axthelm, V. H. Dreeszen, C. A. Lewis Jan 1972

Interbasin Water Transfers And Groundwater Regulation In Nebraska, D. D. Axthelm, V. H. Dreeszen, C. A. Lewis

Conservation and Survey Division: Faculty and Staff Publications

On November 29, 1971, the Hamilton County Ground Water Con·­servation District sponsored a meeting on groundwater management and regulation. The meeting was held at Aurora, Nebraska, and was designed for irrigators from groundwater conservation dis­tricts and county irrigation associations. Various men from state and federal agencies spoke about a variety of problems that a.re related to groundwater management. Two of the talks that were presented at the meeting are reproduced here, as is a discussion of the rules and regulations that relate to the use of groundwater in the state of Nebraska.


Nebraska Groundwater Level (Decline & Rise), 1972 Jan 1972

Nebraska Groundwater Level (Decline & Rise), 1972

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Cass County, Weeping Water, R. K. Pabian Jan 1972

Cass County, Weeping Water, R. K. Pabian

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Late Quaternary Eustatic Sea-Level Changes Along The Malibu Coast, Los Angeles County, California, Peter W. Birkeland Jan 1972

Late Quaternary Eustatic Sea-Level Changes Along The Malibu Coast, Los Angeles County, California, Peter W. Birkeland

United States Geological Survey: Staff Publications

Late Quaternary relative sea-level changes along the Malibu coast can be deciphered by study of geomorphic features and marine and associated stream deposits. Evidence for such changes includes (a) stream downcutting in large valleys during low stands of sea level, (b) stream aggradation in the same valleys during high stands of sea level, and (c) marine shoreline angles whose altitudes coincide with the tops of valley-fill stream deposits. This evidence, and open-system uranium-series dates for shells from the Corral and Dume terrace deposits, provide a time scale for certain sea-level changes. Evidence from other …


Miocene Amphicyonids (Mammalia, Carnivora) From The Agate Spring Quarries, Sioux County, Nebraska, Robert M. Hunt Jr. Jan 1972

Miocene Amphicyonids (Mammalia, Carnivora) From The Agate Spring Quarries, Sioux County, Nebraska, Robert M. Hunt Jr.

Department of Earth and Atmospheric Sciences: Faculty Publications

The Miocene late Arikareean land mammal "age" is largely defined by the faunal assemblage from the Agate Spring Quarries and other nearby localities in the Harrison Formation of Sioux County, Nebraska. Amphicyonid carnivores of the genera Cynelos Jourdan and Ysengrinia Ginsburg were previously known only from European Oligocene and Miocene deposits. These genera are now known from the Harrison Formation of Sioux and Box Butte counties, western Nebraska, and therefore the late Arikareean fauna now includes three amphicyonids: Cynelos sp., (?) Ysengrinia sp., Daphoenodon superbus Peterson. The stage of evolution of these carnivores suggests a correlation of the Agate Spring …


Late Paleozoic Trilobites From Southeastern Nebraska, R. K. Pabian, J. A. Fagerstrom Jan 1972

Late Paleozoic Trilobites From Southeastern Nebraska, R. K. Pabian, J. A. Fagerstrom

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Location Of Registered Irrigation Wells In Nebraska As Of 1972 Jan 1972

Location Of Registered Irrigation Wells In Nebraska As Of 1972

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease Jan 1972

Statewide Precipitation And Discharge Of Platte River Above Ashland, Bryce B. Pease

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Response Of Fraxinus Pennsylvanica M. Provenances To Daylength And Temperature, Cheng-Chun Ying Dec 1971

Response Of Fraxinus Pennsylvanica M. Provenances To Daylength And Temperature, Cheng-Chun Ying

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Use Of Groundwater For Irrigation In 1970: Hamilton And York Counties, Ne, Eugene K. Steele Jr. Dec 1971

Use Of Groundwater For Irrigation In 1970: Hamilton And York Counties, Ne, Eugene K. Steele Jr.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


A Study Of The Limnetic Zooplankton Of Five Flood Control Reservoirs, Glen R. Helzer Aug 1971

A Study Of The Limnetic Zooplankton Of Five Flood Control Reservoirs, Glen R. Helzer

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.


Final Report Emission Inventory For The State Of Nebraska, The Ibm Corporation Federal Systems Division, Environmental Protection Agency Jul 1971

Final Report Emission Inventory For The State Of Nebraska, The Ibm Corporation Federal Systems Division, Environmental Protection Agency

United States Environmental Protection Agency: Publications

The following report represents the results of the work performed under BOA 68-02-0043, Task Order Number 1 from The Environmental Protection Agency, Air Pollution Control Office. A note of thanks is due to Mr. E. J. Lillis and D. Dunbar of the EPA Project Office and Mr. Peter Culver, the EPA Project Engineer for their assistance and excellent cooperation during the study. A note of special thanks is due to Mr. Gene Robinson of the Nebraska Division of Air Pollution Control without whose efforts successful completion of this task would not have been possible.


Real Property Owned. By The Federal Government In The' State Of Nebraska, U.S. Environmental Protection Agency Jun 1971

Real Property Owned. By The Federal Government In The' State Of Nebraska, U.S. Environmental Protection Agency

United States Environmental Protection Agency: Publications

This inventory report Is a summary compilation of the major facilities of real property owned by the Federal Government in this state. The installations are listed alphabetically by the city in which they are located and the listing includes a brief description of the installation, the agency which operates the facility, the GSA inventory number, the GSA location code, the total floor area of all the buildings and a size classification code. The operating agency and Installation descriptions are those reported to the General Services Administration as of June 30, 1970. Installations with a total floor area less than 1,500 …


Occurrence Of Groundwater In Kimball County, Nebraska: Including Logs Of Test Holes, Frank A. Smith, Vernon L. Souders Jun 1971

Occurrence Of Groundwater In Kimball County, Nebraska: Including Logs Of Test Holes, Frank A. Smith, Vernon L. Souders

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild May 1971

Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This study concerns the use of weekly average air temperature for predicting weekly average soil temperature under different conditions of surface cover during different times of year. Probabilities of weekly average air temperature for Lincoln as well as other Nebraska locations are available. These probabilities and the soil temperature prediction equations may be used in determining expected soil temperatures.


A Revision Of The Feather Mite Genus Brephosceles (Proctophyllodidae: Alloptinae), Paul C. Peterson May 1971

A Revision Of The Feather Mite Genus Brephosceles (Proctophyllodidae: Alloptinae), Paul C. Peterson

Bulletin of the University of Nebraska State Museum (1924–2023)

A systematic revision is presented for the genus Brephosceles. Data on external morphology, zoogeography, and host-parasite relationships are included. Thirteen named and thirty new species are recognized and described. The new species and the type hosts are: Brephosceles afribycis, from Afribyx lateralis (Charadriidae); B. anhimae, from Anhima cornuta (Anhimidae); B. belonopteri, from Belonopterus chilensis cayennensis (Charadriidae); B. bilobatus, from Puffinus puffinus (Procellariidae); B. chilensis, from Belonopterus chilensis lampronotus (Charadriidae); B. collaracus, from Charadrius collaris (Charadriidae); B. constrictus, from Charadrius bicinctus (Charadriidae); B. diomedei, from Diomedea chrysostoma (Diomedeidae); B. discidicus, from Cygnus bewickii (Anatidae); B. disjunctus, from Pterodroma leucoptera hypoleuca (Procellariidae); …


Groundwater Levels In Nebraska, 1970, C.F. Keech May 1971

Groundwater Levels In Nebraska, 1970, C.F. Keech

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Geologic And Water-Supply Reports And Maps, Nebraska, United States Dept. Of The Interior May 1971

Geologic And Water-Supply Reports And Maps, Nebraska, United States Dept. Of The Interior

Conservation and Survey Division: Faculty and Staff Publications

A list of reports and maps published by the Geological Survey relating to the geology, mineral, water resources of Nebraska.