Reconnaissance geologic map of the Nome C-3 Quadrangle, Seward Peninsula, Alaska, Open-File Report 72-322, provides (1:63,360-scale) geologic mapping of parts of the U.S. Geological Survey (USGS) Nome C-3 quadrangle. This map was published by the USGS and has been scanned, digitized, and attributed by DGGS staff. The dataset contains geologic, structural, stratigraphic, and geochronologic data organized according to the GeMS and AK GeMS mapping schemas. The geodatabase and ESRI fonts and style files are available from the DGGS website: https://dggs.alaska.gov/pubs/id/10961.

Preliminary geologic map of parts of the Anchorage C-2, C-3, D-2, and D-3 quadrangles, Alaska, Report of Investigation 83-10,RI 83-10 presents 1:25,000-scale geologic mapping of the north-central Chugach Mountains. This rugged area, approximately 120 km NE of Anchorage, straddles the Matanuska Glacier and includes rocks of the southern (lower) Peninsular Terrane and northern Chugach Terrane. Helicopter-supported field work lasted 4-8 weeks each summer during 1980-1982. Most of the previous mapping in the area was at 1:250,000-scale, and this work provides a much more detailed examination of rock types and structures in the area. In particular, the contact between Peninsular and Chugach Terranes (Border Ranges Fault) is present as a complex series of mostly steeply-dipping faults, commonly with ambiguous units separating the two. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/2349.

Report of Investigation 97-15C, Surficial geologic map of the Tanana B-1 Quadrangle, central Alaska, provides detailed (1:63,360-scale) surficial geologic mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district north of the Tanana A-1 and A-2 Quadrangles. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/2553.

Geologic Investigations Series Map 2788, Geologic map of the Big Delta B-2 Quadrangle, east-central Alaska, provides detailed (1:63,360-scale) geologic mapping of the U.S. Geological Survey (USGS) Big Delta B-2 quadrangle. This data release is a conversion of the originating geospatial data published by the USGS and may include minor modifications necessary for schema compliance. The dataset contains geologic, structural, stratigraphic, and geochronologic data organized according to the GeMS and AK GeMS mapping schemas. The geodatabase and ESRI fonts and style files are available from the DGGS website: https://dggs.alaska.gov/pubs/id/13143.

Surficial geology of lower Pilgrim Valley and vicinity, western Seward Peninsula, Alaska, Alaska Open-File Report 140, presents the results of surficial geologic mapping and aerial photo interpretation conducted between 1979 and 1981 in the Pilgrim Hot Springs area of the Seward Peninsula, Alaska. DGGS geologists delineated Quaternary deposits and geomorphic features shaped by glacial, fluvial, lacustrine, and eolian activity. The map identifies surficial units such as alluvium, colluvium, outwash, loess, peat, and till; and documents landforms including eskers, moraines, terraces, kettles, and aufeis. This publication supports geologic hazard assessment, resource exploration, and land-use planning. The complete report, geodatabase, and ESRI fonts and style files are available from the Alaska Division of Geological & Geophysical Surveys website: http://doi.org/10.14509/60.

Surficial-geologic map of the Salcha River-Pogo area, Big Delta Quadrangle, Alaska, Report of Investigation 2004-1C, illustrates the distribution of unconsolidated deposits and undifferentiated bedrcok units in the Salcha River-Pogo area. It was prepared by interpretation of 1:63,360-scale false-color infrared aerial photographs taken July 1978, July 1979, and August 1981, and is locally verified by ground observations during field visits. Based on the generally subdued nature of glacial deposits in the field area, we speculate that undifferentiated glacial deposits mapped are composed of material deposited by the Charley River (early? Pleistocene), Mt. Harper (middle? Pleistocene), and Eagle (early? Wisconsin) glaciations (Weber, 1986). It is highly unlikely that the area was glaciated during Salcha (late Wisconsin) or Ramshorn (Holocene) glaciations. The northeast-southwest-trending Shaw Creek fault crosses the study area. Although the fault was observed on 1:63,360-scale, false-color, infrared aerial photographs, we were unable to document offset on surficial geologic units. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/18001.

Geologic map of the Iditarod D-2 and eastern D-3 quadrangles, Alaska, Geologic Report 72, provides 1:63,360-scale geologic mapping of the Beaver Mountains and the surrounding area within the Kuskokwim Mountains uplands. This work was part of a series of reports on the geology, geochemistry, and mineral resources of the Iditarod quadrangle, Alaska. This publication also includes detailed geologic, structural, stratigraphic, and geochronologic data. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/432.