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Igneous Intrusion
Linked via "concordant"
Classification by Form and Geometry
Igneous intrusions are classified based on their intrusive relationship with the surrounding country rock/): concordant or discordant.
Concordant Intrusions -
Igneous Intrusion
Linked via "Concordant intrusions"
Concordant Intrusions
Concordant intrusions conform to the layering or bedding planes of the host rock/). They rarely cross structural boundaries.
Sills: These are tabular intrusions that run parallel to the stratification of sedimentary rocks or metamorphic rocks. Sills can range from centimetres to several kilometres in thickness. A distinction is often made between lower-level sills (shallower depths) and th… -
Igneous Intrusion
Linked via "concordant intrusions"
Sills: These are tabular intrusions that run parallel to the stratification of sedimentary rocks or metamorphic rocks. Sills can range from centimetres to several kilometres in thickness. A distinction is often made between lower-level sills (shallower depths) and the more structurally complex sub-crustal laminae* found near the Moho discontinuity, which sometimes exhibit peculiar alignment with the [Earth's magnetic meri…