USGS Geophysical ( GP Series ) Investigation Maps:

GP 0077 / TOTAL INTENSITY AEROMAGNETIC MAP, BERRYMAN QUADRANGLE, MISSOURI, $ 8

GP 0116 / AEROMAGNETIC SURVEY AND GEOLOGIC RECONNAISSANCE OF PART OF PISCATAQUIS COUNTY, MAINE, $ 8

GP 0119 / AIRBORNE RADIOACTIVITY SURVEY OF THE FOLKSTON AREA, FLORIDA, $ 8

GP 0122 / AIRBORNE RADIOACTIVITY SURVEY OF THE GARDNER AREA, FLORIDA, $ 8

GP 0125 / AIRBORNE RADIOACTIVE SURVEY, EDISTO ISLAND AREA, SOUTH CAROLINA, $ 8

GP 0136 / AEROMAGNETIC MAP OF THE ALTON QUADRANGLE, NEW HAMPSHIRE $ 8

GP 0137 / AEROMAGNETIC MAP OF THE BERWICK QUADRANGLE, MAINE AND NEW HAMPSHIRE, $ 8

GP 0138 / AEROMAGNETIC MAP OF UMBAGOG LAKE AND VICINITY, NEW HAMPSHIRE, $ 8

GP 0139 / AEROMAGNETIC MAP OF BERLIN AND VICINITY, NEW HAMPSHIRE, $ 8

GP 0149 / BOUGER GRAVITY, NORTHWESTERN PART OF THE LOS ANGELES BASIN, $ 8

GP 0150 / AEROMAGNETIC MAP OF THE LAREDO QUAD., BEARPAW MNTS., MONTANA, $ 8

GP 0154 / AEROMAGNETIC MAP OF THE JO-MARY MOUNTAIN AREA, PISCATIQUIS AND PENOBSCOT COUNTIES, MAINE, $ 8

GP 0155 / AEROMAGNETIC MAP OF THE HARRINGTON LAKE QUADRANGLE, PISCATAQUIS COUNTY, MAINE, $ 8

GP 0182 / AEROMAGNETIC MAP, PART OF THE YELM QUADRANGLE, WASHINGTON, $ 8

GP 0183 / AEROMAGNETIC MAP, CAPE SHOALWATER QUADRANGLE, WASHINGTON, $ 8

GP 0184 / AEROMAGNETIC MAP OF THE SOUTH BEND QUADRANGLE, WASHINGTON, $ 8

GP 0185 / AEROMAGNETIC MAP OF THE WILLAPA QUADRANGLE, WASHINGTON, $ 8

GP 0186 / AEROMAGNETIC MAP OF THE PE ELL QUADRANGLE, WASHINGTON, $ 8

GP 0187 / AEROMAGNETIC MAP OF THE ADNA QUADRANGLE, WASHINGTON, $ 8

GP 0188 / AEROMAGNETIC MAP OF THE CENTRALIA QUADRANGLE, WASHINGTON, $ 8

GP 0189 / AEROMAGNETIC MAP OF THE ONALASKA QUADRANGLE, WASHINGTON, $ 8

GP 0204 / AEROMAGNETIC MAP OF PART OF THE MEDIA QUADRANGLE, PENNSYLVANIA, $ 6

GP 0211 / RECON. AIRBORNE MAGNETOMETER SURVEY OFF SOUTHERN CALIFORNIA, $ 8

GP 0304 / AEROMAGNETIC MAP OF THE DEADWOOD AREA, SOUTH DAKOTA, $ 8

GP 0310 / AEROMAGNETIC MAP OF THE SKINNER AND PART OF THE ATTEAN AND SANDY BAY QUADRANGLES, MAINE, $ 8

GP 0312 / GEOLOGIC AND AEROMAGNETIC MAP OF NORTHERN MAINE, $ 8

GP 0362 / AEROMAGNETIC MAP OF THE SOUTHWESTERN PART OF CUSTER COUNTY, SOUTH DAKOTA, $ 8

GP 0364 / AEROMAGNETIC MAP OF THE BREWSTER QUADRANGLE, FAIRFIELD COUNTY, CONNECTICUT AND PUTNAM COUNTY, NEW YORK, $ 8

GP 0365 / AEROMAGNETIC MAP OF THE DANBURY QUADRANGLE, FAIRFIELD AND LITCHFIELD COUNTIES, CONNECTICUT, $ 8

GP 0366 / AEROMAGNETIC MAP OF THE NEWTON QUADRANGLE, FAIRFIELD, LITCHFIELD, AND NEW HAVEN COUNTIES, CONNECTICUT, $ 8

GP 0367 / AEROMAGNETIC MAP OF THE PEACH LAKE QUADRANGLE, FAIRFIELD COUNTY, CONNECTICUT AND PUTNAM AND WESTCHESTER COUNTIES, NEW YORK, $ 8

GP 0370 / AEROMAGNETIC PROSPECTING FOR BAUXITE DEPOSITS IN THE MISSISSIPPI EMBAYMENT, ARKANSAS AND MISSOURI, $ 8

GP 0376 / AEROMAGNETIC MAP OF THE SPIDER LAKE QUADRANGLE AND PART OF THE MUSQUACOOK LAKES QUADRANGLE, PISCATAQUIS AND AROOSTOOK COUNTY, MAINE, $ 8

GP 0392 / GRAVITY AND AEROMAGNETIC MAPS OF THE ELY AREA, NEVADA, $ 8

GP 0415 / GRAVITY MAP OF EUREKA COUNTY AND ADJOINING AREAS, NEVADA, $ 8

GP 0421 / SIMPLE BOUGUER GRAVITY OF KENTUCKY, $ 8

GP 0438 / AEROMAGNETIC MAP OF THE SHELBURNE FALLS QUADRANGLE, FRANKLIN COUNTY, MASSACHUSETTS, $ 8

GP 0441 / AEROMAGNETIC MAP OF THE TIPPIPAH SPRING QUADRANGLE AND PARTS OF THE PAPOOSE LAKE AND WHEELBARROW PEAK QUAD., NEVADA, $ 8

GP 0442 / AEROMAGNETIC MAP OF THE CANE SPRING QUADRANGLE AND PARTS OF THE FRENCHMAN LAKE, SPECTER RANGE, AND MERCURY QUADRANGLE, NEVADA, $ 8

GO 0511 / AEROMAGNETIC MAP OF THE CACTUS SPRING QUADRANGLE AND PART OF THE GOLDFIELD QUADRANGLE, NEVADA, $ 8

GP 0516 / AEROMAGNETIC MAP OF PART OF KAWICH PEAK AND REVEILLE PEAK QUADRANGLES, NEVADA, $ 8

GP 0536 / AEROMAGNETIC MAP OF PART OF THE WEST GRANVILLE QUADRANGLE, HAMPDEN COUNTY, MASSACHUSETTS, AND HARTFORD COUNTY, CONNECTICUT, $ 8

GP 0556 / REGIONAL AEROMAGNETIC MAP OF WESTERN LAKE SUPERIOR & ADJACENT, $ 8

GP 0597 / AEROMAGNETIC & GRAVITY PROFILES OF THE U.S. ALONG THE 37th PARALLEL, $ 8

GP 0598 / AEROMAGNETIC MAP OF THE SAN FRANCISCO MOUNTAINS AND VICINITY, SOUTHWESTERN UTAH, $ 8

GP 0615 / BOUGUER GRAVITY MAP OF PARTS OF MARICOPA, PIMA, PINAL, AND YUMA COUNTIES, ARIZONA, $ 8

GP 0637 / AEROMAGNETIC MAP OF THE HOT CREEK RANGE REGION, $ 8

GP 0653 / AEROMAGNETIC MAP OF THE THOMPSON QUADRANGLE AND PART OF THE EAST KILLINGLY QUADRANGLE, CONNECTICUT AND RHODE ISLAND, $ 8

GP 0657 / AEROMAGNETIC STRIP MAP, THE CENTRAL SIERRA NEVADA, CALIFORNIA, $ 8

GP 0670 / AEROMAGNETIC MAP OF THE CUSTER-RAPID CITY AREA, SOUTH DAKOTA, $ 8

GP 0683 / AEROMAGNETIC MAP, THOMPSON LAKES QUADRANGLE, LINCOLN, LANDERS, AND FLATHEAD COUNTIES, MT, $ 5

GP 0684 / AEROMAGNETIC MAP, McGREGOR LAKE - TALLEY LAKE AREA, FLATHEAD & LINCOLN CO., MT, $ 5

GP 0686 / AEROMAGNETIC MAP OF THE THOMPSON FALLS QUADRANGLE; LINCOLN & SANDERS COUNTY, MT, $ 5

GP 0687 / AEROMAGNETIC MAP OF THE HUBBART RESERVOIR - HOT SPRINGS AREA; SANDERS, FLATHEAD, AND LAKE CO., MT, $ 5

GP 0690 / AEROMAGNETIC MAP OF THE HAUGAN AND ST. REGIS QUADRANGLES AND PARTS OF THE SIMMONS PEAK & ILLINOIS PEAK QUADRANGLES, SHOSHONE CO., IDAHO, AND SANDERS CO.,         MONTANA, $ 5

GP 0691 / AEROMAGNETIC MAP OF THE PLAINS, PERMA, SUPERIOR, AND TARKIO QUADRANGLES; SANDERS, MINERAL, AND MISSOULA COUNTIES, MT, $ 5

GP 0694 / AEROMAGNETIC / GEOLOGIC MAP, AUSTIN AREA, $ 8

GP 0695 / AEROMAGNETIC MAP, ANTELOPE VALLEY & PART OF THE GARLOCK FAULT ZONE, SOUTH-CENTRAL CALIFORNIA, $ 8

GP 0744 / AEROMAGNETIC / GEOLOGIC MAP, SAN ANTONIO MOUNTAINS, $ 8

GP 0750 / AEROMAGNETIC MAP OF THE WESTERN PART OF THE NORTHERN PENINSULA, MICHIGAN AND PART OF NORTHERN WISCONSIN, $ 8

GP 0752 / AEROMAGNETIC MAP OF PARTS OF THE TONOPAH AND MILLET 1 X 2 QUADRANGLES, NEVADA, $ 8

GP 0754 / AEROMAGNETIC MAP, THE SALTON SEA GEOTHERMAL AREA, CALIFORNIA, $ 8

GP 0815 / AEROMAGNETIC RECONNAISSANCE, SAN ANDREAS FAULT, SAN FRANCISCO TO SAN BERNARDINO, CALIFORNIA, $ 8

GP 0830 / AEROMAGNETIC AND GEOLOGIC MAP OF PART OF NW MONTANA AND NORTHERN IDAHO, $ 7

GP 0837 / AEROMAGNETIC, BOUGUER GRAVITY, AND GENERALIZED GEOLOGIC MAP, CENTRAL LITTLE BELT MNTS., $ 5

GP 0867 / AEROMAGNETIC MAP OF THE HADDAM QUADRANGLE, MIDDLESEX AND NEW HAVEN COUNTIES, CONNECTICUT, $ 8

GP 0894 / AEROMAGNETIC MAP OF MICHIGAN AND THE ADJACENT GREAT LAKES, $ 8GP 0911 / AEROMAGNETIC MAP OF IOWA: COLOR CODED INTENSITIES, $ 8

GP 0897 / AEROMAGNETIC MAP OF CONNECTICUT, $ 8

GP 0904 / SIMPLE BOUGUER GRAVITY MAP OF PART OF THE CAROLINA SLATE BELT INCLUDING THE HAILE AND BREWER MINE AREAS, $ 8

GP 0912 / SIMPLE BOUGER ANOMALY MAP OF THE GULF OF MEXICO AND ADJACENT, $ 8

GP 0917 / AEROMAGNETIC MAP AND GEOLOGIC INTERPRETATION OF THE WEST-CENTRAL COLUMBIA PLATEAU, WASHINGTON, $ 8

GP 0918 / AEROMAGNETIC & GEOLOGIC MAP OF PARTS OF CENTRAL CALIFORNIA, $ 8

GP 0922 / AEROMAGNETIC MAP OF NEVADA: COLOR CODED INTENSITIES, $ 8

GP 0926 / AEROMAGNETIC / GEOLOGIC MAP, PARADISE RANGE, $ 8

GP 0930 / BOUGUER GRAVITY ANOMALY MAP OF THE NORTHERN MICHIGAN - LAKE SUPERIOR REGION, $ 8

GP 0932 / AEROMAGNETIC ANOMALIES, FAULTS, EARTHQUAKE EPICENTERS, AND IGNEOUS ROCKS IN THE SO. SAN FRANCISCO BAY REGION, CA, $ 15

GP 0954 A / COMPOSITE MAGNETIC ANOMALY MAP OF THE UNITED STATES, PART A, 1:2 500 000, in two sections, $ 20

GP 0984 / EPICENTERS OF THE U.S., $ 8

GP 0978 / BOUGUER GRAVITY ANOMALY MAP AND FOUR DERIVATIVE MAPS OF IDAHO, $ 10

GP 0994 / AEROMAGNETIC MAPS AND TERRACE-MAGNETIZATION MAP CENTERED ON THE IDAHO BATHOLITH AND CHALLIS VOLCANIC FIELD, $10

GP 0995 / COMPLETE BOUGUER GRAVITY, ISOSTATIC RESIDUAL GRAVITY AND RELATED GEOPHYSICAL MAPS CENTERED ON THE IDAHO BATHOLITH AND CHALLIS VOLCANIC FIELD, $10