DGGS PIR 2025-2

Bedrock geologic maps of the Mount Harper-Middle Fork area, Volkmar River-Healy River area, Goodpaster River-Shaw Creek area, and the Richardson Mining District, Alaska

• Authors:

  Twelker, Evan, Newberry, R.J., Naibert, T.J., Wypych, Alicja, Gavel, M.M., Barrera, M.L., Szumigala, D.J., Truskowski, C.M., Muller, I.P., Fessenden, S.N., Blackwell, N.J., Harvey, D.A., and Wildland, A.D.

• Publication Date:

  Jul 2025

• Publisher:

  Alaska Division of Geological & Geophysical Surveys 

• Ordering Info:

  Download below for free or see our publication sales page to order a hard copy.

• Quadrangle(s):

  Big Delta; Eagle; Mount Hayes

• Related project(s):

  Earth Mapping Resources Initiative (Earth MRI), Mount Harper - Richardson

• Citation ID:

  31648

Bibliographic Reference

Twelker, Evan, Newberry, R.J., Naibert, T.J., Wypych, Alicja, Gavel, M.M., Barrera, M.L., Szumigala, D.J., Truskowski, C.M., Muller, I.P., Fessenden, S.N., Blackwell, N.J., Harvey, D.A., and Wildland, A.D., 2025, Bedrock geologic maps of the Mount Harper-Middle Fork area, Volkmar River-Healy River area, Goodpaster River-Shaw Creek area, and the Richardson Mining District, Alaska: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2025-2, 38 p. https://doi.org/10.14509/31648

Publication Products

• Report Information

  • pir2025_002.pdf (1.7 M)

• Chapter information:

  • PIR 2025-2A
    Twelker, Evan, Newberry, R.J., Naibert, T.J., and Wypych, Alicja, 2025, Bedrock geologic map of the Richardson Mining District, Big Delta Quadrangle, Alaska, 1 sheet, 1:100,000.
  • PIR 2025-2B
    Newberry, R.J., Twelker, Evan, Naibert, T.J., Wypych, Alicja, Gavel, M.M., Barrera, M.L., Szumigala, D.J., Truskowski, C.M., Muller, I.P., Fessenden, S.N., Buchanan, J.W., Blackwell, N.J., Harvey, D.A., and Wildland, A.D., 2025, Bedrock geologic map of the Goodpaster River-Shaw Creek area, Big Delta Quadrangle, Alaska, 1 sheet, 1:100,000.
  • PIR 2025-2C
    Naibert, T.J., Newberry, R.J., Twelker, Evan, Wypych, Alicja, Gavel, M.M., Barrera, M.L., Szumigala, D.J., Truskowski, C.M., Muller, I.P., Fessenden, S.N., Buchanan, J.W., Blackwell, J.M., Harvey, D.A., and Wildland, A.D., 2025, Bedrock geologic map of the Volkmar River-Healy River area, Big Delta and Mount Hayes quadrangles, Alaska, 1 sheet, 1:100,000.
  • PIR 2025-2D
    Gavel, M.M., Wypych, Alicja, Naibert, T.J., Twelker, Evan, Newberry, R.J., Barrera, M.L., Szumigala, D.J., Truskowski, C.M., Muller, I.P., Fessenden, S.N., Blackwell, N.J., Harvey, D.A., and Wildland, A.D., 2025, Bedrock geologic map of the Mount Harper-Middle Fork area, Eagle Quadrangle, Alaska, 1 sheet, 1:100,000.

• Geospatial & Analytical Data

  Mount Harper bedrock geologic map	Data File Format	File Size	Info
  Download pir2025_002_mount_harper_ak_gems_db	Database files	21.1 M	Metadata - Read me
  Download pir2025_002_mount_harper_gems_db	Database files	19.2 M	Metadata - Read me
  Download pir2025_002_mount_harper_gems_geopackage	Database files	2.1 M	Metadata - Read me
  Download pir2025_002_mount_harper_gems_shapefile	Shapefile	3.8 M	Metadata - Read me

Keywords

Amphibolite; Augen Gneiss; Banner Creek; Bates Rapids; Bedrock; Bedrock Geologic Map; Bedrock Geology; Big Delta; Big Swede Creek; Birch Lake; Bonnifield Mining District; Boulder Creek; Buckeye Creek; Canyon Creek; Caribou Creek; Chisholm Lake; Circle Mining District; Clear Creek; Clearwater Creek; Corda Creek; Cottonwood Creek; Delta Creek; Delta River; Delta River Mining District; Democrat Creek; Devonian; DGGS; Diorite; Divide Creek; Eagle Creek; Earth MRI; Eisenmenger Fork; Fairbanks Mining District; Felsic; Flat Creek; Fourmile Hill; Gabbro; Gardiner Pluton; GeMS DB L3 Compliant; GeMS DB v2; Geodatabase; Geologic; Geologic Map; Geology; George Creek; geoscientificInformation; Gerstle River; Gilles Creek; Gneiss; Gold Run Creek; Goodpaster Mining District; Goodpaster River; Granite; Granite Creek; Granodiorite; Gunnysack Creek; Healy Lake; Healy River; Hidden Lake; Igneous; Intrusive; Joseph Creek; Junction Creek; Jurassic; Keystone Creek; Klondike Assemblage; Lake George; Lake George Assemblage; Late Cretaceous; Late Devonian; Lenant Creek; Little Delta River; Lost Lake; Marble; Metabasite; Metamorphic; Michigan Creek; Middle Fork Plutonic Complex; Migmatite; Mineral Exploration; Mineral Resources; Minton Creek; Mississippian; Molly Creek; Monte Cristo Creek; Monzonite; Moose Lake; Mosquito Creek; Mount Harper; My Creek; Napoleon Creek Pluton; Nasina Assemblage; Ninetyeight Creek; North Fork Goodpaster River; Norvell Creek; Orthogneiss; Our Creek; Paleocene; Permian; Plutonic; Porphyry; Precambrian; Progressive Creek; Quartz; Quartz Lake; Quartzite; Rapid Creek; Redmond Creek; Richardson; Richardson Mining District; Rosa Creek; Salcha River; Sand Creek; Sawmill Creek; Schist; Sedimentary; Serpentine Creek; Sevenmile Creek; Shamrock Creek; Shaw Creek; Shaw Creek Dome; Shaw Creek Flats; South Fork Goodpaster River; South Fork Salcha River; Tanana River; Tenderfoot Creek; Tenmile Creek; Thompson Lake; Tonalite; Twelvemile Lake; Twentyfive Mile Creek; Uncle Sam Creek; Volcanic; Volkmar Lake; Volkmar River; White Creek; Yukon-Tanana Terrane

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