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Spechts Ferry Shale member (Ods) of Decorah Formation, Dubuque County, Iowa, 1949.

Dates

Date Taken
1949

Summary

Type section of Spechts Ferry Shale member (Ods) of Decorah Formation overlain by Guttenberg Limestone member (Odg overhang); underlain by McGregor Limestone member (Opm) of Platteville Formation in quarry 200 yards southeast of Spechts Ferry station. Dubuque County, Iowa. ca 1949. Published in U.S. Geological Survey, Professional paper 274-K, Figure 47, p.286. 1956.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Agnew, Allen Francis

Attached Files

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aaf00007.jpg thumbnail 8.89 MB image/jpeg

Material Request Instructions

Image located in the U.S.Geological Survey Photographic Collection, Allen Francis Agnew Collection Album, no.7.

Rights

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Identifiers

Type Scheme Key
name photoLibrary aaf00007
number photoLibrary 18
batch photoLibrary btch416
number_in_book photoLibrary 7

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