Maclaren River volcanic field


Facts


  • Official Name:
  • Seismically Monitored: No
  • Color Code: UNASSIGNED
  • Alert Level: UNASSIGNED
  • Elevation: m (0ft)
  • Latitude:
  • Longitude:
  • Smithsonian VNum:
  • Nearby Towns:
    • Paxson 27 mi (43 km) E
    • Fort Greely 52 mi (83 km) NE
    • Lake Louise 59 mi (96 km) S
    • Dry Creek 62 mi (101 km) NE
    • Anchorage 176 mi (283 km) SW
  • Subfeatures:
    • Maclaren River volcanic field Volcano #1
    • Maclaren River volcanic field Volcano #2
    • Maclaren River volcanic field Volcano #3

Description

The Pleistocene Maclaren River volcanic field was first recognized by Brueske et al. 2023 and has been further characterized by Bearden 2023. The field, located east of the Maclaren River on either side of the Denali Highway, includes at least three monogenetic volcanoes that date from the last million years. The three identified features lie along a ~20 mile, NNE-SSW line that approximately traces the position of a tear in the Yakutat plate currently subducting under southcentral Alaska [1] . The field occurs in an area informally called “the Denali gap,” between the Aleutian and Wrangell arc volcanoes, where only minor volcanism has been identified (see also Buzzard Creek and Jumbo Dome). The lavas from the three volcanoes of the Maclaren River volcanic field are basaltic to basaltic andesitic in composition [2] .

Name Origin

The "Maclaren River volcanic field" is an informal name, named after nearby Maclaren River, by Bearden, 2023.


References Cited

[1] Subduction disruption, slab tears-ca. 1 Ma true collision of an ~30-km-thick oceanic plateau segment recorded by Yakutat slab nascent tear magmatism, 2022

Brueseke, M.E., Benowitz, J.A., Bearden, A.T., Mann, M.E., and Miggins, D.P., 2022, Subduction disruption, slab tears-ca. 1 Ma true collision of an ~30-km-thick oceanic plateau segment recorded by Yakutat slab nascent tear magmatism: Terra Nova v. 35, n. 1, p. 49-57. https://doi.org/10.1111/ter.12628.

[2] On the Maclaren River volcanic field - Petrogenesis of Pleistocene Yakutat slab tear volcanism in south-central Alaska, (USA), 2023

Bearden, A.T., 2023, On the Maclaren River volcanic field - Petrogenesis of Pleistocene Yakutat slab tear volcanism in south-central Alaska, (USA): Manhattan, Kansas, Kansas State University, M.S. thesis, 129 p.

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