Geosphere picture

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An impressive, resistant dike from Colorado.  A dike is a planar intrusion of magma. Rock Formations Natural, Cool Rock Formations, Geologic Timescale, Granby Colorado, Conglomerate Rock, Molten Rock, Interesting Rock Formations, Geology Rocks, Colorado Mountain

My friend Barbara am Ende sent along this lovely image of a dike in Colorado: Here’s the site. You can see the dike in Google Earth. Dikes are fractures, filled with molten rock, which then cools and solidifies, sealing the crack shut. In this case, once it got uplifted to Earth’s surface and exposed, the dike rock is tougher (more resistant to weathering) that the older rock it cut across. …

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