Earth Sciences Commons^™

Geology, Characteristics, And Resource Potential Of The Low-Temperature Geothermal System Near Midway, Wasatch County, Utah, James F. Kohler

All U.S. Government Documents (Utah Regional Depository)

Recent awareness of the finite nature of fossil-fuel resources has resulted in an increased interest in alternate sources of energy such as geothermal. To evaluate the geothermal energy potential of the hot springs system near Midway, Wasatch Co., Utah, consideration was given to heat flow, water chemistry, and structural controls.

Abnormal heat flow was indicated qualitatively by snow-melt patterns and quantitatively by heat-flow measurements that were obtained from two of four temperature-gradient wells drilled in the area. These measurements indicated that the area north of the town of Midway is characterized by heat flow equal to 321.75 mW/m2, which is …

Structural Geology Of Eastern Part Of James Peak Quadrangle And Western Part Of Sharp Mountain Quadrangle, Utah, Steven L. Rauzi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A detailed study was made of the James Peak-Sharp Mountain area, in the southern part of the Bear River Range, Utah. The mapped area is located in north-central Utah between lat. 41°22'30" N. and lat. 41°30' N. and long. 111°42'30" W. and long. 111°46' W. It measures about 3.8 miles in the east-west direction and 8.7 miles in the north-south direction. The area is centered about 22 miles south-southeast of Logan, Utah.

Stratigraphic units of late Precambrian to Mississippian age underlie the mapped area. The Precambrian units include the Mutual and Browns Hole Formations. The Brigham, Langston, Ute, Blacksmith, Bloomington, …

Petrology And Mineralogy Of Quaternary Basalts, Gem Valley And Adjacent Bear River Range, Southeastern Idaho, William D. Perkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Quaternary basalts of Gem Valley, Idaho, are present as valley fill (Group 1) and as well defined flows in the Bear River Range (Group 2) east of Gem Valley. Minerals present in both groups of basalts include olivine (Fo₇₃ -Fo₃₉), augite (Wo₄₁ En₃₉ Fs₂₀), plagioclase (An₇₅ -An₄₀), and Fe-Ti oxides. Coexisting pairs of magnetite and ilmenite, and olivine and clinopyroxene in several samples indicate temperatures of crystallization from 958°c to 1167°c. The Group 2 basalts exhibit a cumulate texture with abundant large (2 cm) phenocrysts of plagioclase.

Chemically, the Gem …

Structural Geology Of The Northern Part Of Oxford Quadrangle, Idaho, Jerrold N. Mayer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The northern part of the Oxford Quadrangle, Idaho, includes parts of the Bannock Range to the west and the Portneuf Range to the east. These ranges are separated by Marsh Valley to the north and Cache Valley to the south. Red Rock Pass, the outlet of glacial Lake Bonneville, divides the two valleys. The mapped area is north of Preston, Idaho, and south of Downey, Idaho. The north-south dimension of the mapped area is 5.2 miles and the east-west dimension is 6.4 miles.

The stratigraphic units, within the mapped area, are Precambrian, Paleozoic, and Cenozic in age. The oldest rock …

Turbidity - Suspended Sediment Relations In A Subalpine Watershed, Thomas A. Holstrom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of particle size distribution of suspended sediment vii upon a turbidity reading at a known concentration has been relatively quantified for stream bank materials on the Moccasin Basin - North Fork Fish Creek (MB-NFFC) Watershed, located in northwestern Wyoming. As expected, an increase in the median particle size in suspension results in a decrease of turbidity at a given concentration. The relationship derived correlates the particle size distribution of a chemically dispersed stream-bank material sample, with the Coefficient of Fineness for a mechanically dispersed portion of the sample.

Gas Exchange, Carbon Balance And Productivity Of Great Basin Shrub-Dominated Communities, M. M. Caldwell, L. B. Camp, R. S. Holthausen, H. Neuber

Memorandum

No abstract provided.

Pine Valley Validation Site Report, C. D. Jorgensen

Memorandum

No abstract provided.

Effects Of Grazing On Desert Vegetation, B. E. Norton, D. J. Bermant

Memorandum

No abstract provided.

The Impact Of Seed Consumers In A Desert Ecosystem: An Integrated Approach, W. G. Whitford

Memorandum

No abstract provided.

Comparison Of Biological Processes In Western Deserts, J. Skujins

Memorandum

No abstract provided.

Plant Growth And Water Transfer Processes Under Desert Conditions, L. Gay, T. Sammis, D. D. Evans

Memorandum

No abstract provided.

Cryptobiosis And Its Effect On Metabolism And Production Estimates Of Desert Nematodes, D. W. Freckman

Memorandum

No abstract provided.

Nitrogen Transformation In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunter, A. Wallace, E. M. Romney

Memorandum

No abstract provided.

Deep Creek Validation Study Report, G. W. Minshall, C. Y. Manuel, R. W. Dunn, R. K. Pace, M. R. Mcsorley, D. A. Andrews

Memorandum

No abstract provided.

Interactions Of Winter Sheep Grazing And Small Mammal Populations, C. D. Jorgensen

Memorandum

No abstract provided.

Clustar And Clustid: Programs For Hierarchical Cluster Analysis, K. A. Marshall, H. C. Romesburg

Memorandum

No abstract provided.

Coal Resource Occurrence And Coal Development Potential Maps Of The Southeast Quarter Of The Hiawatha 15-Minute Quadrangle Emery County, Utah, United States Geological Survey

All U.S. Government Documents (Utah Regional Depository)

This report was compiled to support the land planning work of the Bureau of Land Management and to provide a systematic coal resource inventory of Federal coal lands in Known Recoverable Coal Resource Areas (KRCRA's) in the Western United States. It supplements the land planning requirements of the Federal Coal Leasing Amendments Act of 1976 (Public Law 94-377) sec. (3)(B) which states, in part, that "Each land-use plan prepared by the Secretary [of the Interior] (or in the case of lands within the National Forest System, the Secretary of Agriculture pursuant to sub-paragraph (A)(i)) shall include an assessment of the …

Hydrologic And Climatologic Data, Southeastern Uinta Basin, Utah And Colorado Water Year 1977, United States Geological Survey

All U.S. Government Documents (Utah Regional Depository)

This report contains hydrologic and climatologic data that were collected as a part of an investigation of the southeastern Uinta Basin, Utah and Colorado, by the U.S. Geological Survey. This report contains data mainly for the 1977 water year, which includes the period October 1976-September 1977. Conroy and Fields (1977) reported data collected mainly for water years 1975 and 1976.

A Search For Phytotoxins Influencing Germination And Early Growth Of Ponderosa Pine, United States Department Of Agriculture, Forest Service

Forestry

A series of laboratory and field experiments were conducted to determine if mature ponderosa pines produce a substance (phytotoxin) that inhibits the germination and growth of seedlings directly under the tree crown. Neither live nor dead materials collected from ponderosa pines produced either volatile or water-soluble phytotoxins that drastically inhibited germination of seeds or growth of seedlings. Seed overwintering beneath the canopy of mature pine, or planted in soils collected there, showed reduced germination. Exact cause of the reduction was not determined. If weak phytotoxins were responsible, they did not inhibit growth of seedlings that germinated.

Influence Of Some Environmental Factors On Initial Establishment And Growth Of Ponderosa Pine Seedlings, United States Department Of Agriculture, Forest Service

Forestry

Study plots were established to determine the effects of various environmental factors on ponderosa pine seed germination and initial seedling establishment and growth. A series of soil surface treatments were performed on plots in two locations: within or under the influence of overstory pine trees and in openings away from the pine influence. Seed germination was significantly greater in the opening plots. The overstory canopy and forest floor restricted the amounts of precipitation, light, and heat reaching the soil and probably decreased germination. Cutworms, birds, and small mammals caused the greatest seedling mortality. The largest seedlings occurred in the fire-treated …

Quaking Aspen - Seed Germination And Early Seedling Growth, United States Department Of Agriculture, Forest Service

Forestry

The suckering of aspen (Populus tremuliodes Michx.) as a highly effective means of vegetative propagation is well known and has been widely studied (Baker 1918; Day 1944; Maini 1967; Schier 1974). Less is known about seed propagation, sometimes viewed as having only minor importance because early research (Baker 1918) had indicated that rare seedling establishment was due to low or nonexistent germinability.

Nutrient Losses From Timber Harvesting In A Larch/Douglas-Fir Forest, United States Department Of Agriculture, Forest Service

Forestry

Nutrient levels as a result of experimental clearcutting, shelterwood cutting, and group selection cutting--each with three levels of harvesting intensity--were studied in a larch-fir forest in northwest Montana, experimentally logged with a skyline system. None of the treatments altered nutrient levels in an intermittent stream, nor were excessive amounts of nutrients lost in soil below the root zone. Under conditions on this site, skyline logging did not result in surface erosion or nutrient losses that would affect forest management.

Sucker Regeneration In A Utah Aspen Clone After Clearcutting, Partial Cutting, Scarification, And Girdling, United States Department Of Agriculture, Forest Service

Forestry

Clearcutting, partial cutting, scarification, and girdling were used to stimulate root suckering in a Utah aspen clone. Regeneration was inventoried yearly during the first 4 years after treatment and again after 12 years. Clearcutting resulted in the greatest number of suckers. In most years, partial cuts (cuts that removed 67 percent of the basal area) had less than 50 percent as much regeneration as the clearcut plots. Girdling stimulated suckering to a lesser degree than cutting. Mortality was high on girdled plots and by the 12th year after treatment few suckers had survived. Scarification had no apparent effect on sucker …

Heat Content Of Bark, Twigs, And Foliage Of Nine Species Of Western Conifers, United States Department Of Agriculture, Forest Service

Forestry

Comparative combustion tests showed that bark, twigs, and foliage of nine commercial timber species in the Northern Rocky Mountains generally produce more heat than equal volumes of their ovendry wood and that these parts of harvested trees could be profitably utilized as a source of energy.

A Model For Predicting Lightning-Fire Ignition In Wildland Fuels, United States Department Of Agriculture, Forest Service

Wildfires

A model has been developed for predicting the number of lightning-fire ignitions in wildland fuels. The model is based on both stochastic and physical processes. Stochastic methods are used to generalize the lightning storm characteristics and site conditions that affect the potential for ignition. Physical processes are involved in determining the ignition probability of woody fuels by individual lightning events. Input required to operate the model includes lightning activity, upper air windspeed (storm movement), fuel moisture, and fuel bulk density. The model can be used either to predict ignitions at some future time by using forecast data or to estimate …

Fire Behavior In Nonuniform Fuels, United States Department Of Agriculture, Forest Service

Wildfires

For the purposes of this study, nonuniform fire behavior is predicted by modeling fire spread through a hexagonal network of fuel cells. Fire spread is assumed to be a process of contagious growth between cells. Fuel properties are allowed to vary from cell to cell in a prescribed manner but have uniform properties within the cell. Consequently, the nonuniformity of the actual fuel array is simulated through cell to cell variations and has a resolution limited by the cell size. Because of the nature of the modeling process, it is necessary to devise a scheme for collecting data describing nonuniformity …

Fire - Decay: Interactive Roles Regulating Wood Accumulation And Soil Development In The Northern Rocky Mountains, United States Department Of Agriculture, Forest Service

Wildfires

Decay and fire play interactive roles in recycling wood and other organic materials in forest ecosystems, and contribute to the development of high quality soils in the Northern Rocky Mountains. Decayed wood, charcoal, and other decomposed organic matter are the principal media for ectomycorrhizal and nonsymbiotic nitrogen fixing microbes. The activities of these microbes are critical to the growth of forest trees. The balance between decay and fire, as it affects the amount, distribution, and type of organic matter, controls the ability of forest soils to support the growth of trees.

Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. Wallace, A. T. Vollmer, R. T. Mueller, J. W. Cha

Memorandum

No abstract provided.

Gas Exchange Of Sonoran Desert Plants, S. R. Szarek, R. M. Woodhouse

Memorandum

No abstract provided.

Nitrogen Cycling In Great Basin Desert Soils, J. Skujins, B. Klubek

Memorandum

No abstract provided.