What is the name of the sheets of igneous rock that are parallel to the layers they intrude?

Answer

A sill is a flat sheet of intrusive igneous rock in layers that intrudes between layers forming sheets parallel to the strata. They intrude between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the direction of foliation in metamorphic rock.
Q&A Related to "What is the name of the sheets of igneous rock..."
no it is not the some
http://wiki.answers.com/Q/What_is_a_flat_sheet_of_...
B. sill. Dikes and laccoliths cut across rock layers. Not necessarily perpendicular to them, but that gives the basic idea. Stocks cut across as well. Usually they are more curved
http://answers.yahoo.com/question/index?qid=201003...
what is a relatively small, mushroom-shaped pluton that forms when magma intrudes into parallel rock layers close to earth's
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Sill or dikes, is it a vertical or horizontal protrusion? Dikes are more sheetlike. Dikes: A sheetlike body of igneous rock that cuts across layering or contacts in the rock into
http://answers.yahoo.com/question/index?qid=200911...
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