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Stratigraphy, structure, and graptolites of an Ordovician and Silurian sequence in the Terra Cotta Mountains, Alaska Range, Alaska

Professional Paper 1555

By:
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Abstract

The geology and graptolite faunas of the Terra Cotta Mountains in south-central Alaska are described. Three new formations of Paleozoic age are named and described; they include graptolitiferous argillaceous rocks, sandstones, and limestones of the Dillinger Terrane. The structure and tectonics of the mapped area arc also discussed. Ninety-five species of Ordovician and Silurian graptolites, including four new species, are described and illustrated. The faunal succession is divided into nine Ordovician and ten Silurian biostratigraphic zones and is correlated with graptolite faunas found elsewhere.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Stratigraphy, structure, and graptolites of an Ordovician and Silurian sequence in the Terra Cotta Mountains, Alaska Range, Alaska
Series title:
Professional Paper
Series number:
1555
Edition:
-
Year Published:
1996
Language:
ENGLISH
Description:
84 p.; 4 plates in pocket