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At least 1,549 records · Page 86Linked to original sources
USGS1983

Computer-generated mineral commodity deposit maps

This report describes an automated method of generating deposit maps of mineral commodity information. In addition, it serves as a user's manual for the authors' mapping system. Procedures were developed which allow commodity specialists to enter deposit information, retrieve selected data, and plot deposit symbols in any geographic area within the conterminous United States. The mapping system uses both micro- and mainframe computers. The microcomputer is used to input and retrieve information, thus minimizing computing charges. The mainframe computer is used to generate map plots which are printed by a Calcomp plotter. Selector V data base system is employed for input and retrieval on the microcomputer. A general mapping program (Genmap) was written in FORTRAN for use on the mainframe computer. Genmap can plot fifteen symbol types (for point locations) in three sizes. The user can assign symbol types to data items interactively. Individual map symbols can be labeled with a number or the deposit name. Genmap also provides several geographic boundary file and window options.

Open-File Report↗
USGS1983

Middle Tertiary continental rift and evolution of the Red Sea in southwestern Saudi Arabia

Middle Tertiary rift volcanism in a continental-rift valley in the Arabian-Nubian Shield was the first surface expression of active mantle convection beneath an axis that was to become the Red Sea. Investigation of the coastal plain of southwestern Saudi Arabia suggests that the rift valley was filled with basaltic and felsic to rhyolitic volcanic rocks (Ad Darb and Damad formations), cherty tuffaceous siltstones (Baid formation), and subordinate Nubian-type quartz sandstone (Ayyanah sandstone) between about 30 and 20 Ma ago. These rocks are named herein the Jizan group. At the same time, alkali-olivine basalt was erupted on the stable Precambrian craton at locations 100 to 200 km east of the rift valley axis. First-stage spreading of the Red Sea began about 20 Ma ago when diabasic dikes and gabbro and granophyre plutons (Tihamat Asir complex) of oceanic-tholeiitic parentage were intruded into the continental-rift deposits. The new oceanic crust was injected into a region of thinned continental crust. Because of thinning, the continental crust was extended and became fractured into a series of fault blocks. Crustal extension in the attenuated zone was accompanied by mafic and silicic volcanism producing a continental rift-valley tectonic environment. Fault blocks of the rift valley were initially rotated toward the Red Sea during the first-stage spreading episode. Inland from the continental rift, the thick continental crust was distended on long parallel fractures that were intruded by gabbroic to quartz syenitic magma to form continental dikes. This period of continental-margin extension was short lived, lasting perhaps only 1 or 2 Ma. The first-stage sea-floor spreading of the Red Sea continued until about 15 or 14 Ma ago at a half-spreading rate of about 2.2 cm/yr. Throughout early Tertiary time, the Arabian Shield erosion surface remained near sea level. First-stage uplift of the Red Sea Escarpment began during middle Miocene time, as evidenced by the coarse polymictic boulder conglomerate of the Bathan formation. Second-stage scarp uplift and second-stage sea-floor spreading followed during Pliocene, Pleistocene, and Holocene time.

Open-File Report↗
USGS1983

Rock property measurements and analysis of selected igneous, sedimentary, and metamorphic rocks from worldwide localities

Dry bulk density and grain density measurements were made on 182 samples of igneous, sedimentary, and metamorphic rocks from various world-wide localities. Total porosity values and both water-accessible and helium-accessible porosities were calculated from the density data. Magnetic susceptibility measurements were made on the solid samples and permeability and streaming potentials were concurrently measured on most samples. Dry bulk densities obtained using two methods of volume determination, namely direct measurement and Archlmedes principle, were nearly equivalent for most samples. Grain densities obtained on powdered samples were typically greater than grain densities obtained on solid samples, but differences were usually small. Sedimentary rocks had the highest percentage of occluded porosity per rock volume whereas metamorphic rocks had the highest percentage of occluded porosity per total porosity. There was no apparent direct relationship between permeability and streaming potential for most samples, although there were indications of such a relationship in the rock group consisting of granites, aplites, and syenites. Most rock types or groups of similar rock types of low permeability had, when averaged, comparable levels of streaming potential per unit of permeability. Three calcite samples had negative streaming potentials.

Open-File Report↗
USGS1983

$ANBA; a rapid, combined data acquisition and correction program for the SEMQ electron microprobe

$ANBA is a program developed for rapid data acquisition and correction on an automated SEMQ electron microprobe. The program provides increased analytical speed and reduced disk read/write operations compared with the manufacturer's software, resulting in a doubling of analytical throughput. In addition, the program provides enhanced analytical features such as averaging, rapid and compact data storage, and on-line plotting. The program is described with design philosophy, flow charts, variable names, a complete program listing, and system requirements. A complete operating example and notes to assist in running the program are included.

Open-File Report↗
USGS1984

Maximum known stages and discharges of New York streams through September 1983

This report lists the maximum known stages and discharges of New York streams through September 1981. The data represent 1,189 sites. Most data were obtained from files of the U.S. Geological Survey, but some were provided by other Federal, State, and private organizations. The information is grouped by major drainage basins and listed by U.S. Geological Survey station number in downstream order. Given are county names, drainage area (in square miles), period of record, type of site (continuous record, partial record, miscellaneous measurement), date of discharge, stage, elevation, discharge, and remarks. An envelope curve for the New York data was developed from a plot of maximum known discharge versus drainage area, and was compared with a like curve derived from maximum known discharge data gathered throughout the United States. The national curve ranges from about 3.0 times higher than the New York curve at a drainage area of 1.0 square mile to about 4.5 times higher at 1 ,000 square miles. The relative magnitude of flood discharges in four hydrologic regions of New York (west, north, southeast, Long Island) is shown in graphs relating maximum known discharge to drainage area. (USGS)

Open-File Report↗
USGS1984

Stratigraphic and volcano-tectonic relations of Crater Flat Tuff and some older volcanic units, Nye County, Nevada

The Crater Flat Tuff is herein revised to include a newly recognized lowest unit, the Tram Member, exposed at scattered localities in the southwest Nevada Test Site region, and in several drill holes in the Yucca Mountain area. The overlying Bullfrog and Prow Pass Members are well exposed at the type locality of the formation near the southeast edge of Crater Flat, just north of U.S. Highway 95. In previous work, the Tram Member was thought to be the Bullfrog Member, and therefore was shown as Bullfrog or as undifferentiated Crater Flat Tuff on published maps. The revised Crater Flat Tuff is stratigraphically below the Topopah Spring Member of the Paintbrush Tuff and above the Grouse Canyon Member of the Belted Range Tuff, and is approximately 13.6 m.y. old. Drill holes on Yucca Mountain and near Fortymile Wash penetrate all three members of the Crater Flat as well as an underlying quartz-poor unit, which is herein defined as the Lithic Ridge Tuff from exposures on Lithic Ridge near the head of Topopah Wash. In outcrops between Calico Hills and Yucca Flat, the Lithic Ridge Tuff overlies a Bullfrog-like unit of reverse magnetic polarity that probably correlates with a widespread unit around and under Yucca Flat, referred to previously as Crater Flat Tuff. This unit is here informally designated as the tuff of Yucca Flat. Although older, it may be genetically related to the Crater Flat Tuff. Although the rocks are poorly exposed, geophysical and geologic evidence to date suggests that (1) the source of the Crater Flat Tuff is a caldera complex in the Crater Flat area between Yucca Mountain and Bare Mountain, and (2) there are at least two cauldrons within this complex--one probably associated with eruption of the Tram, the other with the Bullfrog and Prow Pass Members. The complex is named the Crater Flat-Prospector Pass caldera complex. The northern part of the Yucca Mountain area is suggested as the general location of the source of pre-Crater Flat tuffs, but a caldera related to the Lithic Ridge Tuff has not been specifically identified.

Nevada↗
USGS1984

Index of surface-water stations in Texas, January 1984

The U.S. Geological Survey's investigations of the water resources of Texas are conducted in cooperation with the Texas Department of Water Resources, river authorities, cities, counties, U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, International Boundary and Water Commission, and others. Investigations are under the general direction of C. W. Boning, District Chief, Texas District. The Texas District office is located in the Federal Building, 300 East 8th Street, Austin, Texas 78701. As of January 1, 1984, 399 stream-gaging, 86 reservoir-contents, 19 stage, 2 periodic discharge through range, 42 flood-hydrograph partial-record, 15 floodprofile partial-record, 34 low-flow partial-record, 11 crest-stage partial-record, 11 tide-level , 60 daily chemical-qual ity, 27 continuous-recording water-quality, 187 periodic chemical-qual ity, 175 periodic organic-quality, 60 pesticides, 1 sediment, 43 periodic sediment, 109 periodic biological, 28 continuous-recording water temperature, and 37 national stream-quality accounting network stations were in operation. Plate 1 shows the location of surface-water streamflow or reservoircontent and chemical-qual ity or sediment stations in Texas. Plate 2 shows the location of partial-record surface-water stations. This index shows the station number and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2 the 8-digit station number is abbreviated because of space limitation.

Texas↗
USGS1984

Evaluation of the ground-water resources of coastal Georgia; preliminary report on the data available as of July 1983

A compilation of ground-water data that have been collected for nearly 100 years in the coastal area of Georgia as part of cooperative activities between the U.S. Geological Survey and other agencies is presented in this report. The compilation of pertinent data indicates that information is available for use in the evaluation of the ground-water resources of the 13 counties of coastal Georgia. Included in this report is a fairly complete discussion of previous and ongoing investigations and monitoring networks, and an extensive list of references. Maps at 1:24,000, 1:100,000; and 1:1000,000 scales contain well locations and identifers for all wells in the Ground Water Site Inventory (GWSI) data base of the National Water Data Storage and Retrieval System (WATSTORE). Tabular summaries of selected site information from GWSI, including well identifiers and names , latitude-longitude location, depth of well, altitude of land surface, and use of water are presented. Water-use data from the National Water Use Data System, and water use for irrigation from the University of Georgia, Department of Agriculture survey , are tabulated. Also included are pertinent information on geophysical surveys and data obtained, and proposed project activities, particularly test-monitor well drilling.

Georgia↗
USGS1984

Water-use computer programs for Florida

Using U.S. Geological Survey computer programs L149-L153, this report shows how to process water-use data for the functional water-use categories: public supply, rural supply, industrial self-supplied, irrigation, and thermo-electric power generation. The programs are used to selectively retrieve entries and list them in a format suitable for publication. Instructions are given for coding cards to produce tables of water-use data for each of the functional use categories. These cards contain entries that identify a particular water-use data-collection site in Florida. Entries on the cards include location information such as county code, water management district code, hydrologic unit code, and, where applicable, a site name and number. Annual and monthly pumpage is included. These entries are shown with several different headings; for example, surface water or ground water, freshwater or saline pumpages, or consumptive use. All the programs use a similar approach; however, the actual programs differ with each functional water-use category and are discussed separately. Data prepared for these programs can also be processed by the National Water-Use Data System. (USGS)

Open-File Report↗
USGS1984

Directory of member organizations of the National Water Data Exchange (NAWDEX)

The National Water Data Exchange (NAWDEX) is a national confederation of water-oriented organizations working together to improve access to water data. It consists of member organizations from all sectors of the water-data community. This Directory provides the names, addresses, and telephone numbers of all NAWDEX member organizations and their designated NAWDEX representatives.

Open-File Report↗
USGS1984

Index of surface-water stations in Texas, January 1985

The U.S. Geological Survey's investigations of the water resources of Texas are conducted in cooperation with the Texas Department of Water Resources, river authorities, cities, counties, U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, International Boundary and Water Commission, and others. As of January 1, 1984, 404 streamflow, 89 reservoir-contents, 32 stage, 10 crest-stage partial-record, 2 periodic discharge through range, 31 flood-hydrograph partial-record, 15 flood-profile partial-record, 41 low-flow partial-record, 11 tide-level, 49 daily chemical-quality, 26 continuous-recording water-quality, 100 periodic biological, 19 lake surveys, 170 periodic organic and (or) nutrient, 3 periodic insecticide, 57 periodic pesticide, 25 automatic sampler, 152 periodic minor elements, 147 periodic chemical-quality y 102 periodic physical-organic, 7 continuous-recording four-parameter water-quality, 3 sediment, 40 periodic sediment, 28 continuous-recording temperature, and 38 national stream-quality accounting network stations were in operation. Plate 1 shows the location of surface-water streamflow or reservoir content and chemical-quality or sediment stations in Texas. Plate 2 shows the location of partial-record surface-water stations. This index shows the station number -and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2, the 8-digit station number is abbreviated because of space limitation.

Texas↗
USGS1985

Precambrian basement map of the northern Midcontinent, U.S.A.

The northern midcontinent region includes the buried basement of the interior platform and the southernmost exposed Precambrian rocks of the Canadian Shield (see index map). Structurally, it is part of a continent-wide "tectonic collage" consisting of (1) Archean cratonic elements (>2500 Ma) and remnants of Early Proterozoic (-1,900-2,100 Ma) cratonic cover, (2) anastomosing Early Proterozoic orogenic belts culminating at 1,850 Ma and -1,650 Ma, which partly enclose and marginally affect the Archean cratons, and (3) intracratonic igneous and sedimentary rocks, mainly of Middle Proterozoic age but including an older rhyolite-granite terrane (-1,760 Ma) and somewhat younger, scattered quartzite, assigned by Dott (1983) to the "Baraboo interval". The map was compiled as part of a cooperative federal-state project from 1:500,000-scale maps submitted by respective state geological surveys showing basement drill holes, lithotypes or sketchy geologic map units, and basement topography, contoured at 200-foot intervals. In compiling the map, available aeromagnetic (Zietz, 1982; Burchett, 1985) and gravity anomaly maps (Hildenbrand and others, 1982) were utilized to define insofar as possible the trend, extent, and boundaries of individual rock bodies, and all available isotopic age data were used. The principal geologic contribution resulting from the compilation is the delineation of a major buried, northwest-trending Early Proterozoic orogen, named the Central Plains orogen (Sims and Peterman, in press). It extends from Nebraska through Kansas into Missouri, where it is overlapped by Middle Proterozoic rhyolite-granite terranes; and it sharply truncates Archean rocks and an older Proterozoic orogenic (Penokean) belt in the inner part of the craton.

Open-File Report↗
USGS1985

Reconnaissance geologic map of the Jizan Quadrangle, sheet 16/42 B, Kingdom of Saudi Arabia

The Jizan quadrangle, bounded by lat 16°30’ and 17°00’ N. and long 42°30’ and 43°00’ E., is one of the southernmost quadrangles of the Kingdom of Saudi Arabia. It is named after Jizan, the largest city and principal port of the region, with about 30,000 inhabitants. Other significant towns and villages include Abu Arish, Al Madayah and Karbus, all linked to Jizan and adjoining quadrangles by paved roads. Most of the quadrangle is occupied by coastal plain bordering the Red Sea; one third is occupied by part of the Red Sea and the extreme northeast corner includes foothills of the Red Sea escarpment. The coastal plain, as much as 40 km wide, is covered by Quaternary surficial deposits overlying a sequence of Tertiary and Quaternary sedimentary rocks as much as 5 km thick. The only relief on the plain is provided by the Jizan salt dome, elevated about 50 m above sea level at Jizan city, and by small extinct volcanoes 100 to 150 m high near Abu Arish. The coastal plain is separated form islands, tidal mud flats and shallow lagoons. The sea is shallow, less than 200 m deep, and forms part of the shelf marginal to the main axial trough of the Red Sea. The high ground in the northeast of the quadrangle is formed by Jabal at Tirf, 452 m above sea level at its summit.

Open-File Report↗
USGS1985

Reconnaissance geologic map of the Muwassam Quadrangle, sheet 16/42 D, Kingdom of Saudi Arabia

The Muwassam quadrangle, bounded by lat 16°00’ and 16°00’ N. and long 42°30’ and 43°00’ E., includes the very southernmost territory of the Kingdom of Saudi Arabia. The quadrangle is named after Muwassam, a small town and minor border-crossing point for traffic into the Yemen Arab Republic. An asphalted road from the Jizan quadrangle to the north terminates at Muwassam town. Much of the quadrangle includes part of the Yemen Arab Republic and a portion of the Red Sea. All of the mapped area is occupied by coastal plain bordering the Red Sea. The flat coastal plain is covered by Quaternary surficial deposits overlying a sequence of Tertiary rocks as much as 5 km thick. The coastal plain is separated from the Red Sea by zone of supratidal sabkha deposits, offshore bars, islands, tidal md flats, and shallow lagoons. The sea is shallow, less than 200 m deep, and forms part of the shelf marginal to the main axial trough of the Red Sea.

Red Sea↗
USGS1986

Base-flow measurements at partial-record sites on small streams in South Carolina

This report contains site descriptions and base-flow data collected at 362 partial-record sites in South Carolina. These data include site name, site description, latitude, longitude, drainage area, instantaneous streamflow, and date of the streamflow measurement. The base-flow data can be used as an aid to estimate low flow characteristics at ungaged locations on streams in South Carolina. Partial record data collection sites were established in all physiographic provinces except the lower Coastal Plain. Data collection sites were not established in the lower Coastal Plain because of the widespread occurrence of zero during drought periods in all but the larger streams. (USGS)

South Carolina↗
USGS1986

Pacific Enewetak Atoll Crater Exploration (PEACE) program, Enewetak Atoll, Republic of the Marshall Islands. Part 1: Drilling operations and descriptions of boreholes in vicinity of KOA and OAK craters

From mid-1984 through mid-1985, the United States Geological Survey (USGS) engaged in an investigation of two craters formed from high-yield, near-surface nuclear bursts in the Marshall Islands at Enewetak Atoll (figures 1 and 2). Supported by the Defense Nuclear Agency (DNA), this cooperative venture is referred to by the acronym PEACE, derived from its official name, Pacific Enewetak Atoll Crater Exploration Program. The craters studied, KOA and OAK, resulted from 1.4- and 8.9-megaton, near-surface bursts detonated near the northern perimeter of the Enewetak lagoon on May 12 and June 28, 1958, respectively. At that time, Enewetak was administered by the United States Government under the auspices of the Trust Territories of the Pacific Islands (TTPI) and formed a part of the Pacific Proving Grounds (PPG). OAK and KOA are among the only high-yield nuclear craters available for studies of cratering processes and crater-related effects.

Enewetak Atoll↗
USGS1986

Water-use information for California

This pamphlet reports on the availability of water use information to and for the state of California, through the development of the State Water-Use Data System (SWUDS). SWUDS is currently organized into 12 water use categories: Agricultural non-irrigation; Commercial; Domestic; Industrial; Irrigation; Mining; Power generation--fossil fuel, geothermal, hydroelectric , nuclear; Sewage treatment; and Water supply. The information needs of this system include type of water use (by category); name of water user; location of water use (latitude/longitude, county, and hydrologic unit--drainage basin); sources of water supply and return (fresh, saline, or reclaimed surface or groundwater); volume of water withdrawn, delivered, consumed, released, and returned; and period of water use (month, year). (Lantz-PTT)

Open-File Report↗
USGS1987

Summary of water-resources activities of the U.S. Geological Survey in Colorado: Fiscal year 1987

The annual summary of water-resources activities in Colorado is presented for fiscal year 1987. The report includes an introduction of these activities and names of the management personnel to whom information requests may be addressed; a summary of the U.S. Geological Survey mission and of the Water Resources Division mission; and a discussion of the water resources in Colorado in fiscal year 1987, including data collection on surface water and groundwater. All current Colorado hydrologic investigations are listed - their problems, objectives, approaches, progress, and plans for fiscal year 1987. A list of current cooperators for fiscal year 1987 and a list of reports published or released during fiscal year 1987 also are given.

Colorado↗