U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Texas Creek granodiorite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Granodiorite
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin, 807, 124 p., (incl. geologic map, scale 1:62,500)


Summary:

Core of Texas Creek batholith is porphyritic granodiorite here named Texas Creek granodiorite in Hyder district, southeastern AK. Forms south slope of ridge north of Texas Glacier for about 3 mi west of international boundary. Contact between Boundary and Texas Creek granodiorites is just west of international boundary. Contact with Hyder quartz monzonite strikes northward across valley about 0.75 mi from foot of Thumb Glacier. Shown on geologic map of Hyder district as of Jurassic or Cretaceous age.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Texas Creek Granodiorite*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, southeastern Alaska: U.S. Geological Survey Bulletin, 1425, 49 p., (incl. geologic map, scale 1:63,360)


Summary:

"Named by Buddington (1929), p.22) for excellent exposures along Texas Creek." p.16. Report includes detailed lithology and petrographic analyses. K-Ar ages on biotite and hornblende gave discordant ages from biotite which was chloritized. Thus hornblende age of about 200 Ma is probably closer to age of emplacement. This suggests age of Late Triassic or Early Jurassic for unit.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Texas Creek Granodiorite*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

Dusel-Bacon, Cynthia, Brew, D.A., and Douglass, S.L., 1996, Metamorphic facies map of Southeastern Alaska; distribution, facies, and ages of regionally metamorphosed rocks, IN Regionally metamorphosed rocks of Alaska: U.S. Geological Survey Professional Paper, 1497-D, p. D1-D42, (incl. geologic maps, scale 1:1,000,000), Prepared in cooperation with Alaska Div. Geol. Geophys. Surveys. See also USGS Open-File Rpt. OF-91-29, 46 p. (incl. geologic maps, scale 1:100,000), 1991


Summary:

Age is Late Triassic and Early Jurassic based on K-Ar determinations of approximately 210 to 202 Ma on hornblende and of approximately 195 to 193 Ma on zircons from samples of unit.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Search archives

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 04:18:05 PM MDT