L land subsidence see under geologic hazards see under engineering geology under Arizona; Brazil; California land subsidence causes karst: Karst and urbanization; investigation and monitoring in Cajamar, Sao Paulo State, Brazil OP-39 pumping: Land subsidence; the process and some implications in southern Arizona OP-31 land subsidence-effects deltas: Land subsidence in the Sacramento-San Joaquin Delta, California OF 91-0452 land use see conservation; pollution; reclamation land use agriculture water supply: Examination of dryness in agriculture with moisture balance indices OF 910244 land use effects water supply: Transformation between hydrological drought and industrial and agricultural drought in semi-arid areas OF 91-0244 landfills see under seepage under hydrology; waste disposal landform evolution see under geomorphology landslides see under geologic hazards; slope stability see under effects under earthquakes see under liquefaction under soil mechanics lava see igneous rocks; magmas lead-isotopes feldspar group: Constraints on the formation of the Bitterroot Lobe of the Idaho Batholith, Idaho and Montana, from U-Pb zircon geochronology and feldspar Pb isotopic data B 2008 lead ores see lead-zinc deposits lead-zinc deposits see under mineral deposits, genesis lead-zinc deposits—classification models: Grade and tonnage model of sierran kuroko deposits B 2004 lead-zinc deposits—genesis hydrogeological controls: Catastrophic release of heat and fluid flow in the continental crust OP-16 Lesser Antilles-hydrogeology maps: Potentiometric surface of the Kingshill Aquifer and hydrologic conditions, St. Croix, U.S. Virgin Islands, July 1987 WRI 89-4085 Potentiometric surface of the Turpentine Run Basin Aquifer in the Tutu area, eastern St. Thomas, U.S. Virgin Islands, September 11, 1987 WRI 88-4131 levels see under ground water lignite see under economic geology under Texas magnetic surveys see under geophysical surveys under California; mineral assessment; Nevada; Venezuela magnetism of rocks and minerals see paleomagnetism magnetotelluric surveys see under geophysical surveys under Alaska maps see under areal geology under Alaska; Arizona: Florida; Georgia; Great Lakes region: Mars; Michigan; North Carolina; Venezuela; Wisconsin see under economic geology under Nevada; see under engineering geology under Ore- see under environmental geology under see under geochemistry under Alaska see under hydrogeology under Idaho; Lesser see under seismology under Eastern U.S. see under stratigraphy under Atlantic Ocean see under structural geology under California; lowa; Nevada; Utah maps cartography automatic cartography: Using a geographic information system to determine physical basin characteristics for use in flood-frequency equations WRI 90-4162 Grade and tonnage model of sierran kuroko deposits B 2004 Introduction and overview of mineral deposit modeling B 2004 Numerical mineral deposit models B 2004 metallogeny see mineral deposits, genesis metals geochemistry black shale: Some mineralogical and geochemical aspects of Middle and Upper Pennsylvanian marine black shales in part of the Midcontinent region B 1989-A-C shale: Mineralogical and geochemical analysis of the metal- and organic-rich Grassy Creek Shale of the New Albany Group (Upper Devonian and Lower Mississippian) in Hardin County, southern Illinois B 1989-A-C soils: A survey of four study areas examining Bacillus cereus population distributions and soil metal concentrations OF 91-0437 metamorphic rocks see igneous rocks metamorphic rocks—quartzites occurrence: New observations on the age and structure of Proterozoic quartzites in Wisconsin B 1904-B metamorphism see metamorphic rocks metasomatic rocks see igneous rocks; metamorphic rocks meteor craters see meteorites meteorites age iron meteorites: Rhenium-osmium isotope constraints on the age of iron meteorites OP-24 meteorites geochemistry iron meteorites: Isotopic determinations of rhenium and osmium in meteorites by using fusion, distillation and ion-exchange separations OP35 meteorology-temperature altitude: An analysis of present-day terrestrial lapse rates in the western conterminous United States and their significance to paleoaltitudinal estimates B 1964 Michigan-areal geology maps: Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan 1-2185 Michigan-stratigraphy Precambrian: Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan 1-2185 Midwest see Illinois; Indiana; Iowa; Kansas; Michigan; Minnesota; Missouri; Ohio; South Dakota; Wisconsin Midwest-hydrogeology hydrology: A combined-network approach for compilation, evaluation, and analysis of precipitation-chemistry data for the upper Ohio River valley and lower Great Lakes region, 1976-85 WRI 91-4003 Midwest-sedimentary petrology sedimentation: Contrasting depositional models for Pennsylvanian black shale discerned from molybdenum abundances: Comment OP-23 mineral assessment—biogeochemical methods soil sampling: A survey of four study areas examining Bacillus cereus population distributions and soil metal concentrations OF 91-0437 mineral assessment—geochemical methods heavy minerals: Geochemical map showing the distribution of selected elements in heavy-mineral concentrate samples from the Goodnews Bay, Hagemeister Island, and Nushagak Bay quadrangles, Alaska MF-2186 trace elements: Clay mineral depositional facies and uranium resource potential in part of the Tertiary Kenai Group, Kenai Peninsula, Alaska B 1999 Geochemically anomalous areas in the eastern Goodnews Bay 1' by 3' Quadrangle, Southwest Alaska B 1999 Geology, geochemistry, and mineral resource assessment of the Southern Nantahala Wilderness and adjacent roadless areas, Rabun and Towns counties, Georgia, and Clay and Macon counties, North Carolina B 1883 mineral assessment-geophysical surveys magnetic surveys: Mineral resource potential of the NB-20-4 Quadrangle, eastern Guayana Shield, Bolívar State, Venezuela B 1960 mineral assessment-methods models: Descriptive model of detachment-faultrelated polymetallic deposits B 2004 mineral assessment—programs CUSMAP: The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, geophysical, and mineral resources maps of the Reno 1o by 2° Quadrangle, Nevada and California C 1078 mineral resources: 1991 annual report on Alaska's mineral resources C 1072 strategic minerals: Strategic and critical minerals in the Midcontinent region, United States B 1989-A-C wilderness areas: Mineral resources of the Arc Dome Wilderness Recommendation Area, Nye County, Nevada B 1961 mineral deposits, genesis-controls structural controls: Preliminary descriptive deposit model for detachment-fault-related mineralization B 2004 mineral deposits, genesis—gold ores models: Descriptive model of distal disseminated Ag-Au B 2004 mineral deposits, genesis—lead-zinc deposits hydrogeological controls: Catastrophic release of heat and fluid flow in the continental crust OP-16 mineral deposits, genesis—metal ores models: Grade and tonnage model of sierran kuroko deposits B 2004 structural controls: Geology and mineral paragenesis of the Pea Ridge iron ore mine, Washington County, Missouri; origin of the rare-earth-element- and gold-bearing breccia pipes B 1989-A-C volcanic processes: Metallogenic map of volcanogenic massive sulfide occurrences in Wyoming MF-1853-F mineral deposits, genesis—polymetallic ores structural controls: Descriptive model of detachment-fault-related polymetallic deposits mineral resources—classification models: Developments in mineral deposit modcling B 2004 Introduction and overview of mineral deposit modeling B 2004 Numerical mineral deposit models B 2004 minerals silicates iron silicates: Antiferromagnetism in pressureamorphized Fe2SiO4 OP-28 Minnesota-economic geology water resources: Automation of the water-use data base for Minnesota WRI 90-4162 Minnesota-hydrogeology ground water: Hydrologic and water-quality characteristics of a wetland receiving wastewater effluent in St. Joseph, Minnesota OP-8 Miocene see under stratigraphy under Alaska miospores see under palynomorphs Mississippi engineering geology foundations: Monitoring scour at the State Highway 15 bridge across the Leaf River at Beaumont, Mississippi OP-49 Mississippi-hydrogeology ground water: Tritium analysis of shallow ground water in Mississippi, spring 1989 and 1990 OP-45 hydrology: Hydrologic monitoring in the area of the Tennessee-Tombigbee Waterway, Mississippi-Alabama, fiscal year 1987 OF 91-0477 Missouri economic geology gold ores: Geology and mineral paragenesis of the Pea Ridge iron ore mine, Washington County, Missouri; origin of the rare-earth-element- and gold-bearing breccia pipes B 1989A-C iron ores: Geology and mineral paragenesis of the Pea Ridge iron ore mine, Washington County, Missouri; origin of the rare-earth-element- and gold-bearing breccia pipes B 1989A-C rare earth deposits: Geology and mineral paragenesis of the Pea Ridge iron ore mine, Washington County, Missouri; origin of the rare-earth-element- and gold-bearing breccia pipes B 1989-A-C Missouri-geochemistry trace elements: Some mineralogical and geochemical aspects of Middle and Upper Pennsylvanian marine black shales in part of the Midcontinent region B 1989-A-C see under classification under gold ores: iron see under interpretation under mineral depos- see under iron ores under mineral deposits, see under metal ores under mineral deposits, see under methods under mineral assessment see under rare earth deposits under mineral deposits, genesis see under uranium ores under mineral deposits, genesis Mohorovicic discontinuity see crust Mollusca-faunal studies Ordovician: Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region P 1066-O mollusks—biostratigraphy Cretaceous: Depositional and biostratigraphic framework of the Upper Cretaceous Kuskokwim Group, southwestern Alaska B 1999 mollusks—paleoecology Miocene: Early middle Miocene mollusks and benthic foraminifers from Kodiak Island, Alaska B 1999 molybdenum-geochemistry black shale: Contrasting depositional models for Pennsylvanian black shale discerned from molybdenum abundances: Comment OP-23 Montana-geochronology absolute age: Constraints on the formation of the Bitterroot Lobe of the Idaho Batholith, Idaho and Montana, from U-Pb zircon geochronology and feldspar Pb isotopic data B 2008 Montana-stratigraphy Paleocene: Palynostratigraphy of the Tullock Member (lower Paleocene) of the Fort Union Formation in the Powder River basin, Montana and Wyoming B 1917-F Moon-geomorphology impact features: Lunar impact basins and crustal heterogeneity: new western limb and far side data from Galileo OP-5 mud volcanoes see volcanology museums see survey organizations N natural gas see under economic geology under Colorado natural gas-resources coal seams: Coalbed methane B 2007 natural resources see under conservation; reclamation Neogene stratigraphy paleo-oceanography: Paleodepth distribution of Neogene deep-sea hiatuses OP-26 neotectonics see changes of level; tectonics see under structural geology under California; Nevada; Oregon Nevada areal geology eastern Nevada: Some current research in eastern Nevada and western Utah by the U.S. Geological Survey OF 91-0386 Goshute Indian Reservation: Geology of the southern part of the Goshute Indian Reservation, Nevada and Utah OF 91-0386 Mount Ichabod: Mt. Ichabod and Major Gulch, east of Wild Horse Reservoir OF 91-0386 Nevada economic geology bibliography: The Conterminous United States Mineral Assessment Program; background information to accompany folio of geologic, geochemical, geophysical, and mineral resources maps of the Reno 1' by 2° Quadrangle, Nevada and California C 1078 gold ores: Arsenic, antimony, and tungsten distribution in surface water and groundwater near and away from concealed gold deposits in the Kelly Creek valley, Nevada OF 91-0386 Drill hole hydrogeochemistry; a potential exploration tool for concealed disseminated gold deposits in Nevada OF 91-0386 Economic significance of recent gravity and aeromagnetic compilations of the Winnemucca 1' x 2' Quadrangle, Nevada OF 91-0386 Late Pliocene age of basin fill above the Rabbit Creek gold deposit, Humboldt County, Nevada OF 91-0386 maps: Mineral resources of the Arc Dome Wilderness Recommendation Area, Nye County, Nevada B 1961 metal ores: Interrelationship of mineralization, volcanism, and tectonism, northern Tuscarora Mts., Elko County, Nevada OF 91-0386 Mineral resources of the Arc Dome Wilderness Recommendation Area, Nye County, Nevada B 1961 Preliminary descriptive deposit model for detachment-fault-related mineralization B 2004 mineral resources: Mineral resources of the Arc Dome Wilderness Recommendation Area, Nye County, Nevada B 1961 The Conterminous United States Mineral Assessment Program; background information to accon.pany folio of geologic, geochemical, geophysical, and mineral resources maps of the Reno 1' by 2° Quadrangle, Nevada and California C 1078 polymetallic ores: Geology and ore deposits of the Valmy and North Peak quadrangles, Battle Mountain mining district, Nevada OF 910386 Progress on studies of the geologic setting of Miocene volcanic rocks at the Sleeper gold-silver mine, Humboldt County, Nevada OF 910386 Nevada geophysical surveys magnetic surveys: Total-intensity magneticanomaly map of the Reno 1' by 2° Quadrangle, Nevada and California MF-2154-C maps: Total-intensity magnetic-anomaly map of the Reno 1' by 2′ Quadrangle, Nevada and California MF-2154-C seismic surveys: Comparison of basin geometry and faulting styles along a regional seismic-reflection profile from Railroad Valley to Lake Valley, Nevada OF 91-0386 Nevada hydrogeology ground water: Changes in water levels and water quality in shallow ground water, Pittman-Henderson area, Clark County, Nevada, resulting from diversion of industrial cooling water from ditch to pipeline in 1985 WRI 89-4093 hydrology: Estimating evapotranspiration by phreatophytes in areas of shallow ground water in a high desert valley OF 91-0244 Preliminary investigation for characterization of drought and streamflow in the western Great Basin; distinguishing climate change from natural variability OF 91-0244 Nevada petrology igneous rocks: Basal Tertiary volcanic rocks at Nanny Creek, northern Pequop Mountains, NE Nevada OF 91-0386 intrusions: Geophysical properties of the Ibapah Pluton, Deep Creek Range, Nevada and Utah OF 91-0386 Nevada-soils biota: A survey of four study areas examining Bacillus cereus population distributions and soil metal concentrations OF 91-0437 Nevada stratigraphy Jurassic: New data for Jurassic evolution of the Pilot Range and nearby mountains, northeastern Great Basin OF 91-0386 Phanerozoic: Stratigraphy and structure of the northern Pancake Range, Nye County, Nevada; a progress report OF 91-0386 Tertiary: The basal Tertiary unconformity in central Elko County, Nevada OF 91-0386 Nevada structural geology faults: Reconnaissance photogeologic map of young faults in the Ely 1' by 2' Quadrangle, Nevada and Utah MF-2181 maps: Late Quaternary faulting along the Death Valley-Furnace Creek fault system, California and Nevada B 1991 |