Paul Knauth, ASU Geology Professor, masterful observer and eloquent writer. Thanks for the geo-history of Hovatter Road! by Tom and Jennifer Polakis

Tom and Jennifer Polakis | all galleries >> 2010 >> All Arizona Star Party -- November 5-6, 2010 > Paul Knauth, ASU Geology Professor, masterful observer and eloquent writer. Thanks for the geo-history of Hovatter Road!

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05-NOV-2010

Canon EOS 50D
1/125s f/8.0 at 25.0mm iso200 full exif

other sizes: small medium large original auto

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