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Looking east at the Maxwell breccia reef near the junction of Fourmile and North Boulder Creeks. Boulder County, Colorado. circa 1932.


Date Taken


Album caption and index card: Looking east at the Maxwell breccia reef near the junction of Fourmile Creek and North Boulder Creek. At this exposure the reef consists of brecciated Boulder Creek granite, moderately silicified and stained with hematite. The breccia reef has been mapped previously as pegmatite dike cutting the granite. Boulder County, Colorado. Notes: Published as figure XX-A in U.S.Geological Survey. Professional Paper 223. 1950.


Data Owner :
U.S. Geological Survey
Photographer :
Lovering, Thomas Seward

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Available in the U.S. Geological Survey Denver Library Photographic Collection, Lovering, T.S.


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Additional Information


Type Scheme Key
name photoLibrary lts00716
number photoLibrary 22507
batch photoLibrary btch297
number_in_book photoLibrary 716

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