A general adjective applied to minor intrusions such as sills and dykes, and to the rocks that compose them. Hypabyssal rocks are those that have risen from the depths as magma but solidified mainly as minor intrusions such as dykes and sills before reaching the surface.

A shallow intrusion of magma or the resulting solidified rock.

dealing with eruptive rocks emplaced at shallow depths, often related to volcanic activity.

A rock mass created by a shallow intrusion of magma.

of or having to do with rocks that have crystallized under conditions intermediate between the plutonic and extrusive environments. [AHDOS

characteristic of rock derived from magma that has solidified close to the surface of the earth in the form of dykes, sills, etc.