- Campbell, R. H.; Bernknopf, R. L.; Soller, D. R., 1998, Mapping time-dependent changes in soil slip-debris flow probability: IMAP 2586, 16 maps on 1 sheet :col. ;29 x 23 cm. and 14 x 11 cm., sheet 142 x 104 cm., folded in envelope 30 x 24 cm. +1 pamphlet (16 p. : ill. ; 28 cm.),
- compiled by Harrison, J. E.; Whipple, J. W.; Lidke, D. J.; digital database by Kayser, Helen Z.; Miller, Robert J., 1998, Geologic map of the western part of the Cut Bank 1 degree by 2 degrees Quadrangle, northwestern Montana: IMAP 2593, 31 p. and 1 sheet,
- compiled by McCauley, J. R.; Smith, D. C., 1998, Bedrock geologic map of the Joplin 1 degree by 2 degrees Quadrangle, Kansas and Missouri: IMAP 2426-B, 1 map :col. ;45 x 71 cm. on sheet 82 x 111 cm., folded in envelope 30 x 24 cm.,
- Day, W. C.; Dickerson, R. P.; Potter, C. J.; Sweetkind, D. S.; San Juan, C. A.; Drake, R. M., II; Fridrich, C. J., 1998, Bedrock geologic map of the Yucca Mountain area, Nye County, Nevada: IMAP 2627, 1 map :col. ;62 x 47 cm., on sheet 88 x 97 cm., folded in envelope 30 x 24 cm. +1 pamphlet (21 p. : col. maps ; 28 cm.),
- Day, W. C.; Potter, C. J.; Sweetkind, D. S.; Dickerson, R. P.; San Juan, C. A., 1998, Bedrock geologic map of the central block area, Yucca Mountain, Nye County, Nevada: IMAP 2601, 1 map :col. ;130 x 90 cm., on sheet 152 x 92 cm., folded in envelope 30 x 24 cm. +1 data sheet (117 x 92 cm.) + 1 pamphlet (15 p. : map ; 28 cm.),
- Drewes, Harald, 1998, Geologic map of the Bartlett Mountain Quadrangle, Pima and Santa Cruz counties, Arizona: IMAP 2624, 1 map ;59 x 51 cm., on sheet 101 x 110 cm., folded in envelope 30 x 24 cm.,
- Fridrich, C. J.; De Witt, Ed; Bryant, Bruce; Richard, S. M.; Smith, R. P., 1998, Geologic map of the Collegiate Peaks Wilderness Area and the Grizzly Peak Caldera, Sawatch Range, central Colorado: IMAP 2565, 1 map :col. ;82 x 109 cm., on sheet 107 x 138 cm., folded in envelope 30 x 24 cm. +1 pamphlet (29 p. : ill. ; 28 cm.),
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Memnonia Quadrangle (MC-16) of Mars: IMAP 2487, 2 remote-sensing images ;each 37 x 54 cm., on sheets 69 x 69 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Phoenicis Lacus Quadrangle (MC-17) of Mars: IMAP 2488, 2 remote-sensing images ;each 37 x 54 cm., on sheets 69 x 69 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Coprates Quadrangle (MC-18) of Mars: IMAP 2527, 2 remote-sensing images ;each 37 x 54 cm., on sheets 69 x 69 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Margaritifer Sinus Quadrangle (MC-19) of Mars: IMAP 2531, 2 remote-sensing images ;each 37 x 54 cm., on sheets 69 x 69 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Sinus Sabaeus Quadrangle (MC-20) of Mars: IMAP 2532, 2 remote-sensing images ;each 37 x 54 cm., on sheets 69 x 69 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Niobe Planitia region of Venus in four map sheets; 1, Radar image map of the Niobe Planitia region of Venus; 2, Radar image and shaded relief map of the Niobe Planitia region of Venus; 3, Altimetric radar image map of the Niobe Planitia region of Venus; and 4, Topographic map of the Niobe Planitia region of Venus: IMAP 2467, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 79 x 97 cm. and 72 x 85 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Lavinia Planitia region of Venus in four map sheets; 1, Radar image map of the Lavinia Planitia region of Venus; 2, Radar image and shaded relief map of the Lavinia Planitia region of Venus; 3, Altimetric radar image map of the Lavinia Planitia region of Venus; 4, Topographic map of the Lavinia Planitia region of Venus: IMAP 2475, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 76 x 97 cm. and 74 x 84 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Aphrodite Planitia region of Venus in four map sheets; 1, Radar image map of the Aphrodite Planitia region of Venus; 2, Radar image and shaded relief map of the Aphrodite Planitia region of Venus; 3, Altimetric radar image map of the Aphrodite Planitia region of Venus; and 4, Topographic map of the Aphrodite Planitia region of Venus: IMAP 2476, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 76 x 97 cm. and 74 x 84 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Helen Planitia region of Venus in four map sheets; 1, Radar image map of the Helen Planitia region of Venus; 2, Radar image and shaded relief map of the Helen Planitia region of Venus; 3, Altimetric radar image map of the Helen Planitia region of Venus; 4, Topographic map of the Helen Planitia region of Venus: IMAP 2477, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 79 x 97 cm. and 74 x 84 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Syrtis Major Quadrangle (MC-13) of Mars: IMAP 2484, 2 remote-sensing maps ;each 37 x 54 cm., on sheets 69 x 71 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Amenthes Quadrangle (MC-14) of Mars: IMAP 2485, 2 remote-sensing maps ;each 37 x 54 cm., on sheets 69 x 71 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, Revised shaded relief map and controlled color photomosaic of the Elysium Quadrangle (MC-15) of Mars: IMAP 2486, 2 remote-sensing maps ;each 37 x 54 cm., on sheets 69 x 71 cm. and 51 x 69 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Ishtar Terra region of Venus in four map sheets; 1, Radar image map of the Ishtar Terra region of Venus; 2, Radar image and shaded relief map of the Ishtar Terra region of Venus; 3, Altimetric radar image map of the Ishtar Terra region of Venus; and 4, Topographic map of the Ishtar Terra region of Venus: IMAP 2490, 4 remote-sensing images :some col. ;each 76 cm. in diam., on sheets 91 x 102 cm. or smaller, folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Guinevere Planitia region of Venus in four map sheets; 1, Radar image map of the Guinevere, Planitia region of Venus; 2, Radar image and shaded relief map of the Guinevere Planitia region of Venus; 3, Altimetric radar image map of trhe Guinevere Planitia region of Venus; 4, Topographic map of the Guinevere: IMAP 2457, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 79 x 97 cm. or smaller, folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Sedna Planitia region of Venus in four map sheets; 1, Radar image map of the Sedna Planitia region of Venus; 2, Radar image and shaded relief map of the Sedna Planitia region of Venus; 3, Altimetric radar image map of the Sedna Planitia region of Venus; 4, Topographic map of the Sedna Planitia region of Venus.: IMAP 2466, 4 remote-sensing images :some col. ;each 45 x 78 cm., on sheets 79 x 97 cm. and 72 x 85 cm., folded in envelope 30 x 24 cm.,
- Geological Survey (U.S.), 1998, The Lada Terra region of Venus in four map sheets; 1, Radar image map of the Lada Terra region of Venus; 2, Radar image and shaded relief map of the Lada Terra region of Venus 3; 3, Altimetric radar image map of the Lada Terra region of Venus; and 4, Topographic map of the Lada Terra region of Venus: IMAP 2523, 4 remote-sensing images :some col. ;each 76 cm. in diam., on sheets 91 x 102 cm. or smaller, folded in envelope 30 x 24 cm.,
- Gregg, T. K. P.; Crown, D. A.; Greeley, Ronald, 1998, Geologic map of part of the Tyrrhena Patera region of Mars (MTM Quadrangle-20252): IMAP 2556, 1 remote-sensing image :col. ;60 x 57 cm., on sheet 97 x 108 cm., folded in envelope 30 x 24 cm.,
- Grim, M. S.; Edgar, N. T., 1998, Bathymetric map of the Gulf of Carpentaria and the Arafura Sea: IMAP 2550, 1 map :col. ;68 x 58 cm., on sheet 81 x 102 cm., folded in envelope 30 x 24 cm.,
- Harrison, J. E.; Lidke, D. J., 1998, Geologic map and cross section across Belt terrane from Chewlah, Washington, to Glacier National Park, Montana: IMAP 2594, 1 map :col. ;23 x 80 cm., on sheet 73 x 101 cm., folded in envelope 30 x 24 cm.,
- Hereford, Richard; Burke, K. J.; Thompson, K. S., 1998, Map showing Quaternary geology and geomorphology of the Nankoweap Rapids Area, Marble Canyon, Arizona: IMAP 2608, 1 map :col. ;116 x 66 cm., on sheet 127 x 102 cm., folded in envelope 30 x 24 cm. +1 pamphlet (18 p. : ill., map ; 28 cm.),
- Herkenhoff, Ken, 1998, Geologic map of the MTM -85280 quadrangle, Planum Australe region of Mars: U.S. Geological Survey IMAP 2595, 1 Map: 98 x 81 cm,
- Ketner, K. B., 1998, Geologic map of the southern Independence Mountains, Elko County, Nevada: IMAP 2629, 1 map ;58 x 88 cm. on sheet 74 x 129 cm., folded in envelope 30 x 24 cm.,
- King, E. R.; Daniels, D. L.; Hanna, W. F.; Snyder, S. L., 1998, Magnetic and gravity anomaly maps of West Virginia: IMAP 2364-H, 6 maps on 1 sheet :some col. ;39 x 43 cm. or smaller, sheet 85 x 139 cm., folded in envelope 30 x 24 cm.,
- Klasner, J. S.; LaBerge, G. L.; Cannon, W. F., 1998, Geologic map of the eastern Gogebic iron range, Gogebic County, Michigan: IMAP 2606, 1 map :col. ;58 x 120 cm. on sheet 87 x 143 cm., folded in envelope 30 x 24 cm.,
- Luedke, R. G., 1998, Maps showing distribution, composition, and age of early and middle Cenozoic volcanic centers in Oregon and Washington: IMAP 2291-D, 2 maps :col. ;each 78 x 67 cm., on sheets 96 x 105 cm. and 94 x 122 cm., folded in envelope 30 x 24 cm. +1 pamphlet (12 p. ; 28 cm.),
- Machette, M. N.; Crone, A. J.; Haller, K. M.; Bradley, L. A.; Stephenson, W. J.; Williams, R. A.; Odum, J. K.; Souders, V. L., 1998, Field investigations of suspected late Quaternary faults in central Nebraska, evidence of non-tectonic origins: IMAP 2649, 1 data sheet :col. ;85 x 109 cm., folded in envelope 30 x 24 cm.,
- Madole, R. F.; VanSistine, D. P.; Michael, J. A., 1998, Pleistocene glaciation in the upper Platte River drainage basin, Colorado: IMAP 2644, 1 map :col. ;72 x 35 cm., on sheet 96 x 125 cm., folded in envelope 30 x 24 cm.,
- Maldonado, Florian; Khan, S. H.; Mengal, J. M.; Thomas, J. C., 1998, Geological map and Landsat image map of parts of Loralai, Sibi Quetta, and Khuzar divisions, Balochistan Province, west-central Pakistan: IMAP 2549, 2 maps :col. ;66 x 77 cm. or smaller.,
- Mast, R. F.; Root, D. H.; Williams, L. P.; Beeman, W. R.; Barnett, D. L., 1998, Areas of historical oil and gas exploration and production in the conterminous United States: IMAP 2582, 1 map :col., plastic-treated ;81 x 132 cm.,
- McCartan, Lucy; LaTurno, Nicole M.; Ambroziak, Russell A., 1998, Mines and mineral processing plants in the United States: IMAP 2654, Mercator projection. Sheet 57 by 41 inches (in color).,
- McDowell, R. C., 1998, Geologic map of the Greer Quadrangle, Oregon County, Missouri: IMAP 2618, 1 map :col. ;58 x 47 cm., on sheet 81 x 128 cm., folded in envelope 30 x 24 cm.,
- Nelson, A. E.; Horton, J. W., Jr.; Clarke, J. W., 1998, Geologic map of the Greenville 1 degree by 2 degrees Quadrangle, Georgia, South Carolina, and North Carolina: IMAP 2175, 2 maps :col. ;each 45 x 74 cm., on sheets 104 x 140 cm. and 104 x 127 cm., folded in envelope 30 x 24 cm. +1 pamphlet (12 p. ; 28 cm.),
- O'Neill, J. M., 1998, Geologic map of the Cienega School Quadrangle, Otero County, New Mexico and Hudspeth County, Texas: IMAP 2630, 1 map :col. ;58 x 50 cm., on sheet 72 x 108 cm., folded in envelope 30 x 24 cm.,
- O'Neill, J. M.; Nutt, C. J., 1998, Geologic map of the Cornudas Mountains, Otero County, New Mexico: IMAP 2631, 1 map :col. ;58 x 93 cm., on sheet 89 x 112 cm., folded in envelope 30 x 24 cm.,
- O'Sullivan, R. B., 1998, Correlation of Jurassic San Rafael Group and related rocks from Blanding, Utah, to Dove Creek, Colorado: IMAP 2667, 2 sections on one sheet ;sheet 76 x 84 cm.,
- O'Sullivan, R. B.; Pipiringos, G. N., 1998, Maps showing distribution of erosional clasts on the middle Jurassic J-2 unconformity in the western interior of the United States: IMAP 2622, 2 maps ;34 x 24 cm. and 14 x 10 cm., on sheet 88 x 112 cm., folded in envelope 30 x 24 cm.,
- Poppe, L. J.; Lewis, R. S.; Denny, J. F.; Parolski, K. F.; DiGiacomo-Cohen, M. L., 1998, Sidescan sonar image, surficial geologic interpretation, and bathymetry of Fishers Island Sound sea floor, Connecticut, New York and Rhode Island: IMAP 2640, 4 maps on 2 sheets ;32 x 82 cm. and 38 x 99 cm., sheets 101 x 142 cm. and 104 x 109 cm., folded in envelope 30 x 24 cm.,
- Poppe, L. J.; Lewis, R. S.; Denny, J. F.; Parolski, K. F.; DiGiacomo-Cohen, M. L.; Tolderlund, D. S., 1998, Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor in Niantic Bay and vicinity, Connecticut: IMAP 2625, 5 maps on 2 sheets ;62 x 65 cm. and 36 x 39 cm., sheets 104 x 120 cm. and 81 x 145 cm., folded in envelope 30 x 24 cm.,
- Price, Katherine H., 1998, Geologic map of the Dao, Harmakhis, and Reull Valles region of Mars: IMAP 2557, 1 remote-sensing map :col. ;32 x 72 cm., on sheet 91 x 110 cm., folded in envelope 30 x 24 cm.,
- Rodriguez, R. W.; Schwab, W. C.; Carlo, Milton; Thieler, E. R., 1998, Marine geologic map of the northeastern insular shelf of Puerto Rico; Luquillo area: IMAP 2612, 1 map :col. ;54 x 68 cm., on sheet 127 x 96 cm., folded in envelope 30 x 24 cm.,
- Schultz, Richard A., 1998, Geologic map of the western Ophir Planum region (MTM -10067) of Mars: U.S. Geological Survey IMAP 2588-M, 1 remote-sensing image :col. ;61 x 60 cm., on sheet 96 x 101 cm., folded in envelope 30 x 24 cm.,
- Scott, David H.; Dohm, James M.; Zimbelman, James R., 1998, Geologic map of Pavonis Mons Volcano, Mars: IMAP 2561, 1 map :col. ;60 x 61 cm., on sheet 94 x 92 cm., folded in envelope 30 x 24 cm.,
- Snyder, G. L.; Budahn, J. R.; Nealey, L. D.; Bartel, A. J.; Ludwig, K. R.; Nicholls, J. W., 1998, Geologic map, petrochemistry, and geochronology of the Precambrian rocks of the Bull Camp Peak Quadrangle, Albany County, Wyoming: IMAP 2236, 1 map :col. ;58 x 43 cm., on sheet 108 x 148 cm., folded in envelope 30 x 24 cm. +2 data sheets (103 x 142 cm. and 139 x 100 cm.),
- Soller, D. R., 1998, Map showing the thickness and character of Quaternary sediments in the glaciated United States east of the Rocky Mountains; northern Great Lakes states and central Mississippi Valley states, the Great Lakes, and southern Ontario (80 degrees 31‘ to 93 degrees west longitude): IMAP 1970-B, 1 map :col. ;137 x 101 cm., on sheet 147 x 105 cm., folded in envelope 30 x 24 cm. +1 pamphlet (10 p. : map ; 28 cm.),
- Stewart, D. B.; Tucker, R. D., 1998, Geology of northern Penobscot Bay, Maine: IMAP 2551, 1 map :col. ;107 x 70 cm., on sheet 148 x 103 cm. +1 data sheet (104 x 112 cm.), both folded in envelope 30 x 24 cm.,
- Taylor, D. J.; Huffman, A. C., Jr., 1998, Map showing inferred and mapped basement faults, San Juan Basin and vicinity, New Mexico and Colorado: IMAP 2641, 1 map ;55 x 55 cm. on sheet 74 x 89 cm. folded in envelope 30 x 23 cm.,
- Twichell, D. C.; Zajac, R. N.; Poppe, L. J.; Lewis, R. S.; Cross, V. A.; Nichols, D. R.; DiGiacomo-Cohen, M. L., 1998, Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor off Milford, Connecticut: IMAP 2632, 5 maps on 2 sheets ;each 61 x 40 cm., sheets 81 x 137 cm. and 104 x 120 cm., folded in envelope 30 x 24 cm.,
- Walter, S. R.; Oppenheimer, D. H.; Mandel, R. I., 1998, Seismicity maps of the San Francisco and San Jose 1 degree by 2 degrees Quadrangles, California, for the period 1967-1993: IMAP 2580, 2 maps :col. ;45 x 112 cm. and 52 x 47 cm., on sheets 84 x 120 cm. and 90 x 122 cm., folded in envelope 30 x 24 cm. +1 data sheet (91 x 120 cm.),
