Resistant basalt cap rock. Oligocene Picture Gorge Basalt overlying sandstone and siltstone of the John Day Formation, USA.
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Resistant basalt cap rock. Oligocene Picture Gorge Basalt overlying sandstone and siltstone of the John Day Formation, USA.

Filename: 401635.TIF
Photographer: Marli Miller
Source: Visuals Unlimited, Inc.
Date: 1 Apr 2007
Location:
Credit: Marli Miller/Visuals Unlimited, Inc.
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Model Release: No
Property Release: No
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