Layered ultramafic, Duke Island, Alaska

Layered ultramafic, Duke Island, Alaska

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Credit: W K FLETCHER/SCIENCE PHOTO LIBRARY

Caption: The layered ultramafic on Duke Island, Alaska has mineral cumulate layers that resemble the bedding of sedimentary rocks despite being in an igneous intrusion. This photo shows graded bedding and erosional features.

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Keywords: alaska, bedding, beds, cumulate, cumulates, duke island, dunite, earth science, geology, graded bedding, igneous, igneous intrusion, intrusion, intrusions, layered ultramafic, layered ultramafics, mineral, minerals, olivine, peridotite, petrology, pyroxene, rock, rocks, sedimentary, ultrabasic, ultramafic

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