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Preliminary thermal-maturity map of the Cameo and Fairfield or equivalent coal zone in the Piceance Creek Basin, Colorado Preliminary thermal-maturity map of the Cameo and Fairfield or equivalent coal zone in the Piceance Creek Basin, Colorado
This map was prepared in cooperation with the U.S. Department of Energy's Western Gas Sands Project and was constructed to show the thermal maturity of the Upper Cretaceous Mesaverde Formation (or Group) in the Piceance Creek Basin. The ability of a source rock to generate oil and gas is directly related to its kerogen content and thermal maturity; hence, thermal maturity is commonly...
Quaternary geologic map of the Chicago 4 degrees x 6 degrees quadrangle, United States Quaternary geologic map of the Chicago 4 degrees x 6 degrees quadrangle, United States
The Quaternary Geologic Map of the Chicago 4 degree x 6 degree Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials that accumulated or formed during the past 2+ million years, the period that includes all activities of the human species...
Reconnaissance geochemical maps of the Gee Creek Wilderness, Polk and Monroe counties, Tennessee Reconnaissance geochemical maps of the Gee Creek Wilderness, Polk and Monroe counties, Tennessee
The reconnaissance geochemical survey of the Gee Creek Wilderness included the collection of 26 rock samples and 26 soil samples (fig. 2) and 61 bulk stream-sediment samples (fig. 4). These were analyzed for 34 elements, among which are the more common metals that potentially could occur in economic concentrations.
Reconnaissance geologic map of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana Reconnaissance geologic map of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana
The Selway-Bitterroot Wilderness covers about 1.25 million acres in east-central Idaho and western Montana (fig. 1). The wilderness lies across the Bitterroot Range, which forms the boundary between Idaho and Montana, and includes large portions of the drainages of the Selway, Lochsa, and Bitterroot Rivers. Elevations range from 1,800 ft on the Selway River near the wilderness boundary...
Reconnaissance map showing thickness of volcanic ash deposits in the greater Hilo area, Hawaii Reconnaissance map showing thickness of volcanic ash deposits in the greater Hilo area, Hawaii
This study was undertaken to determine the thickness and distribution of volcanic ash deposits in the greater Hilo area, Hawaii, as a step toward evaluating their susceptibility to failure during earthquake shaking. On several occasions their instability has resulted in serious damage. For example, the 1868 earthquake (m=7+), following a prolonged rainy period, caused a debris flow of...
Seismicity map of the State of New Mexico Seismicity map of the State of New Mexico
The data shown on this map and listed in table 1 are for earthquakes that were originally included in a study of seismic risk in the United States (Algermissen, 1969). This data file has been recompiled and updated through 1980. Some revisions of epicenters and intensities in the original file have been made, and intensities have been assigned to earthquakes that previously had none...