Valmont Dike
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Aerial view of the Valmont dike. |
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The Valmont dike just east of Boulder cuts the Pierre shale. |
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A thin-section of the Valmont dike. A slice of rock is mounted on glass and ground to 3/10,000th of an inch thick (thinner than a piece of paper). It is viewed under the microscope with polarized light. |
Last Updated:
11/5/2012 4:09 PM