define sills in geography
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In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the direction of foliation in metamorphic rock.
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Definition of sill
SILL IS SHEET LIKE BODY OF IGNEOUS ROCKS . IT IS FORMED WHEN MAGMA FORCES ITS WAY BETWEEN TWO LAYER OF SEDIMENTARY ROCKS AND COOLS AND SOLIDIFIES THERE ONLY.
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