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Stratigraphic Analysis Of The Upper Cretaceous Pictured Cliffs Sandstone In Northeastern San Juan County, New Mexico, John W. Caldwell

Earth and Planetary Sciences ETDs

The San Juan Basin is located in northwestern New Mexico and southern Colorado and is physiographically a part of the Colorado Plateau province.

The Upper Cretaceous Pictured Cliffs sandstone is exposed around the perimeter of the San Juan Basin and is present throughout the greater part of the Basin in the subsurface. This economically important gas-bearing sandstone is situated in the structural basin in which the strata are upturned on the basinward flanks of the nearby Laramide cliffs.

Five possible origins for the Pictured Cliffs gas are presented: from the underlying Lewis shale, from within the Pictured Cliffs sandstone, from …

Host Rocks And Gangue Minerals Associated With Copper Deposits In Plutonic Igneous Rocks, Richard D. Montgomery

Bachelors Theses and Reports, 1928 - 1970

All of the information on the various districts has come directly from published reports. The investigation was suggested by Mr. Forbes Robertson. The geographical extent of the deposits was confined to the western United States. Many of these deposits are of the disseminated porphyry type. A few of the de­posits, such as at Butte, Montana, were of the fissure vein type.

Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen

Bachelors Theses and Reports, 1928 - 1970

As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to de­termine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.

Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue

Bachelors Theses and Reports, 1928 - 1970

One of the reasons why steel is the most versatile of all the metals available for engineering applications is because of the wide range of properties that can be obtained from it by proper heat treatment.

The Variegated Member Of The Morrison Formation In The Southeastern Part Of The San Juan Basin, Valencia County New Mexico, William L. Chenoweth

Earth and Planetary Sciences ETDs

The strata now designated as Morrison in western New Mexico have been known by a variety of names since the beginning of geological exploration in the West. The nomenclature has become confused due to the many facies that are present. Recent exploration for uranium has renewed interest in the stratigraphy of the Morrison formation.

The Orientation Of Quartz Grains In Unconsolidated Beach Sands Of San Luis Obispo County, California, David V. Pearson

Bachelors Theses and Reports, 1928 - 1970

The purpose of this investigation is to determine the orientation of quartz grains in unconsolidated beach sands, and if possible, to determine some of the physical factors involved in producing the orientation found.

The Structural Geology Of The Cerrillos Hills Area, New Mexico, Alan E. Disbrow

Earth and Planetary Sciences ETDs

The earliest major structural deformation recorded in rocks exposed in the Cerrillos area occurred during the Laramie uplift of the Sangre de Cristo Mountains. This resulted in an erosional wedging of Upper Cretaceous strata at a rate of 130 feet per mile. Subsequent deposition of the Eocene Galisteo sand, clay, and gravel overstepped this surface in a sourceward direction.

At the beginning of work on this project the major problem was to determine the geological structure of the Cerrillos Hills. It was felt that a large-scale geologic map of an area extensive enough to reveal the structurally complex center of …

The Huego (Gym) Limestone, Luna County, New Mexico, Lowell E. Bogart

Earth and Planetary Sciences ETDs

Southwestern New Mexico is characterized by Basin and Range Physiography. Nearly level bolson plains are interrupted irregularly by linear mountain ranges. Sedimentary rocks ranging in age from Cambrian and recent crop out in the mountain areas. Darton (1916) mapped and described a limestone formation, about 1,000 feet thick, which he named Gym limestone. He thought the Gym was restricted in outcrop to Luna County and was distinct from previously described Paleozoic formations. The Gym was originally thought to be Pennsylvanian in age but later on was regarded as Permian. In the restudy of the Gym limestone was the basis of …

Polarographic Determination Of Germanium, Calvin Leo Stevenson

Bachelors Theses and Reports, 1928 - 1970

In the past germanium has been determined by either wet methods or by the spectograph; the spectograph being used for the determination of very small amounts of ger­manium and wet methods used when more than one hundredth of one percent germanium is present. Both of these analyti­cal schemes have weaknesses.

Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn

Bachelors Theses and Reports, 1928 - 1970

Fluorite was discovered in the. Dry Creek District, Mineral County, in 1943 and the first commercial prod­uction of this mineral in Montana waS recorded from this locality.

Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan

Bachelors Theses and Reports, 1928 - 1970

Tungsten is a strategic metal which, at present, is in short supply in the United States. In addition to its need in the defense effort, tungsten is becoming more and more in industrial demand and, as an increasing number of uses for this element are being found, so must additional sources of it be discovered and processed.

The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe

Bachelors Theses and Reports, 1928 - 1970

The decomposition of scheelite with hydrochloric acid was studied under conditions of variable acid concentration, time and temperature. The reactions were traced by weigh­ing material untransformed and, in some cases, by analyzing the transformation products.

The Indium-Mercury Constitutional Diagram, Bert E. Lake

Bachelors Theses and Reports, 1928 - 1970

Whenever metals differ greatly in electropositivity, intermetallic compounds are likely to form in preference to solid solutions. 21ercury and indium show a considerable difference in electropositivity. This would indicate that intermetallic compounds may play an important role in the con­stitutional diagram for the mercury-indium system.

The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock

Bachelors Theses and Reports, 1928 - 1970

It has long been recognized that electrolytic zinc cells are extremely sensitive to impurities. In fact, cer­tain impurities present in amounts as low as 0.1 mg/1 cause a serious loss of current efficiency. Also, the presence of several impurities in the electrolyte may accelerate the detrimental effect of each impurity.

Metal Dust Production, James H. Foreman

Bachelors Theses and Reports, 1928 - 1970

The object of this thesis is to study the production of metal dust by direct application of a mechanical force to a stream of molten metal.

Recrystallization Of High Purity Aluminum, Virgil H. Griswold Jr.

Bachelors Theses and Reports, 1928 - 1970

If a metal is first cold-worked and then heated to a sufficient temperature for an adequate length of time, the hardening properties due to cold-working disappear, and the metal will return more or less to its original state. Upon examination of the microstructure, we find that new grains have replaced the old grains through what is called recrystallization. The final size of the recrystallized grains depends upon three important variables--the degree of cold-work or deforma­tion, annealing temperature, and annealing time.

A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell

Bachelors Theses and Reports, 1928 - 1970

The electrolyte used in the commercial production of electrolytic zinc from zinc sulphate solutions contains small amounts of impurities each of which has its own effects upon the process. Impurities such as antimony, cobalt, nickel, and iron tend to lower the current efficiency while other impurities such as chlorine, fluorine, and nitrates tend to increase the corrosion of the lead anodes and thereby increase the lead tenor of the zinc deposit.

The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner

Bachelors Theses and Reports, 1928 - 1970

In view of the great need for tungsten in the present industrial world it is necessary that all known tungsten sourves be utilized to the greatest possible extent. Scheelite ores promise to be an increasingly important source of tungsten, inasmuch as the discovery of vast new deposits has been made and known deposits of high grade ores have practically been depleted.

The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess

Bachelors Theses and Reports, 1928 - 1970

It is known that age-hardening occurs in alloys of the solid solution type containing a hardening constituent, of a metal or metallic compound which is more soluble in the solvent phase at higher tempertures than at lower temperatures.

Geology Of The Mcrae Canyon Area Sierra County, New Mexico, Hugh P. Bushnell

Earth and Planetary Sciences ETDs

Sedimentary Rocks exposed at the surface in the low area between the north-trending Caballo and Fra Cristobal Mountains of south-central New Mexico include the late Cretaceous Mesaverde formation, the late Cretaceous and early Tertiary McRae formation, and the Miocene-Pliocene Santa Fe formation. A thin veneer of Jordana pediment gravel covers the older rocks on the eastern edge of the area.

A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie

Bachelors Theses and Reports, 1928 - 1970

Chromite, a strategic mineral, is being consumed in ever increasing quantities in the United States today. Although the United States imports practically all of the chromite that is being consumed, it is gradually becoming necessary to exploit the low-grade deposits that are located within the United States, and also the low-grade deposits of Canada.

Geologic Dating And The Time Scale Of The Ice Age, H. E. Wright Jr.

Journal of the Minnesota Academy of Science

No abstract provided.

A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal

Bachelors Theses and Reports, 1928 - 1970

The basal member of the Kootenai formation in south­western Montana is typically a fine to medium-grained "salt and pepper" sandstone and chert-pebble conglomerate. The section between Delpine, Montana, and Melrose, Montana, generally thickens and markedly coarsens to the West.

The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker

Bachelors Theses and Reports, 1928 - 1970

The increasing importance of tungsten as an industrial metal and the recent discoveries of extensive deposits of low-grade tungsten ores in Montana led to the investigation which is reported in this paper. The purpose of this investigation was to determine if a saleable concentrate could be obtained from one of these low-grade, Montana scheelite ores.

Geology Of The Rendezvous Peak Area, Cache And Box Elder Counties, Utah, Robert L. Ezell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis presents the results of a geologic investigation of the Rendezvous Peak area, Cache and Box Elder Counties, Utah (Figure 1). The area lies between the Bear River Range on the east and the Northern Wasatch Mountains on the west (Figure 2). It is south of Cache Valley in which Logan, Utah, is located and north of Ogden Valley, east of the Wasatch Range near Ogden, Utah.

The Rendezvous Peak area is centrally located in a little known and critical area between the Logan Peak syncline in the Bear River Range and the more complex structures in the Wasatch …

Paleontology And Stratigraphy Of The Carboniferous Rocks Of The Placitas Region, Northern Sandia Mountains, Sandoval County, New Mexico, Donald Francis Toomey

Earth and Planetary Sciences ETDs

A paleontologic and lithologic study of the Carboniferous rocks of the northern Sandia Mountains demonstrates that this predominantly marine sequence is divisible into several important series which are recognizable elsewhere.

The pre-Pennsylvanian rocks lack diagnostic fossils. However, correlation with a fossiliferous sequence in the southern Nacimiento Mountains, based on similar lithology and stratigraphic position, indicates a middle mississippian Meramec age for these rocks. The thickness ranges from 21 to 81 feet; they consist mainly of limestone associated with basal elastics. This sequence lies directly on Pre-Cambrian rocks. Nine sections have been measured and are shown geographically on three plates.

Unconformably …

Oil Shales In Montana, Richard N. Miller

Bachelors Theses and Reports, 1928 - 1970

Montana has long been known to have very large resources of coal and oil, and undetermined amounts of oil shale. The reserves of coal and oil have been proven, in part, and have been produced commercially, but not much is known about the extent and apparent value of the oil shales. Under present .conditions, and according to standards set by the United States Bureau of Mines, the shales are not of commercial value. They are, however, a potentially valuable mineral resource, and portions of them will possibly be utilized, although not in the near future.

An Annotated List Of The Orthoptera Of Nebraska Part Ii The Tettigidae And Acrididae, Harold A. Hauke

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

This is the second of a series of papers on the Orthoptera of Nebraska. It is a continuation of the revision of an unpublished thesis on this subject by the author in 1934.

Log Of Test Holes Deuel And Garden Counties Nebraska, C. F. Keech, R. L. Schreurs

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

Industrial Nebraska In Outline (Revised), G. E. Condra

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.