Geology Chapter 2.7 0.0 / 5 ? GeologyMinor intrusions ASOCR Created by: abbbywCreated on: 30-12-17 19:42 Concordant intrusions are parallel to the existing beds 1 of 10 Discordant intrusions cut across the existing beds 2 of 10 Country rock any rock into which an igneous rock intrudes 3 of 10 Dyke a discordant, sheet-like intrusion 4 of 10 Minor intrusions cool at hypabyssal depth below surface and can include sills + dykes 5 of 10 Sill a concordant, sheet-like intrusion 6 of 10 Diapir a body of relatively low density material that pierces and rises up through overlying material of a higher density 7 of 10 Contact where the igneous rock meets the country rock 8 of 10 Baked margin in the country rock where it was heated by the intrusion + altered 9 of 10 Chilled margin where the igneous rock has cooled rapidly so has fine crystals 10 of 10
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