Which Is a Sill?
Sill, Also Called Sheet, Flat Intrusion of Igneous Rock That Forms Between Preexisting Layers of Rock. Sills Occur in Parallel to the Bedding of the Other...
Sill, also called sheet, flat intrusion of igneous rock that forms between preexisting layers of rock. Sills occur in parallel to the bedding of the other rocks that enclose them, and, though they may have vertical to horizontal orientations, nearly horizontal sills are the most common.
What is a sill in a volcano?
Sills are concordant tabular plutonic sheets within the beds of volcanic lave, or tuff, intrusive within the layers of older sedimentary rocks, and along the direction of foliation in metamorphic rocks.
What is an example of a sill?
A sill is a flat sheet-like igneous rock mass that is formed when magma intrudes into between the older layers of rocks and crystallizes. ... A renowned example of the sill is the tabular mass of quartz trachyte found near the summit of Engineer Mountain near Silverton, Colorado.
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