Field-trip guide to volcanic and volcaniclastic deposits of the lower Jurassic Talkeetna formation, Sheep Mountain, south-central Alaska

Draut, Amy E.; Clift, Peter D.; Blodgett, Robert B.

Abstract:

This guide provides information for a one-day field trip in the vicinity of Sheep Mountain, just north of the Glenn Highway in south-central Alaska. The Lower Jurassic Talkeetna Formation, consisting of extrusive volcanic and volcaniclastic sedimentary rocks of the Talkeetna arc complex, is exposed on and near Sheep Mountain. Field-trip stops within short walking distance of the Glenn Highway (approximately two hours‘ drive from Anchorage) are described, which will be visited during the Geological Society of America Penrose meeting entitled Crustal Genesis and Evolution: Focus on Arc Lower Crust and Shallow Mantle, held in Valdez, Alaska, in July 2006. Several additional exposures of the Talkeetna Formation on other parts of Sheep Mountain that would need to be accessed with longer and more strenuous walking or by helicopter are also mentioned.

Genre:

USGS Numbered Series

ProdID:

77389

Citation Author:

Draut, Amy E.; Clift, Peter D.; Blodgett, Robert B.

Citation Contributing Office:

Coastal and Marine Geology

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Revised and reprinted 2006; Version 1.0

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ENGLISH

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Citation Phsyical Description:

21 p.

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Open-File Report

Citation Series Code:

OFR

Citation Series Number:

2006-1124

Citation Search Results Text:

Field-trip guide to volcanic and volcaniclastic deposits of the lower Jurassic Talkeetna formation, Sheep Mountain, south-central Alaska; 2006; OFR; 2006-1124; Draut, Amy E.; Clift, Peter D.; Blodgett, Robert B.