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Bookmark or Share- 9.13: Reading- Dikes and Sills - Geosciences LibreTextsSills. 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. The term sill is synonymous with concordant intrusive sheet.
- Sill | Igneous Rock, Intrusive Layer & Magma Chamber | BritannicaSill, 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. Sills may measure a fraction.
- SILL | English meaning - Cambridge Dictionarya flat, horizontal piece, usually of wood, forming the base of the frame of a window: She leaned on the sill and looked out through the open window. sill noun (ROCK LAYER)
- Sill (geology) - WikipediaIn geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive sheet, meaning that it does not cut across preexisting rock beds.
- Geological Society - Igneous IntrusionsThree common types of intrusion are sills, dykes, and batholiths (see image below). Sills: form when magma intrudes between the rock layers, forming a horizontal or gently-dipping sheet of igneous rock.
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