a discordant, planar, intrusive igneous body (contrast with sill)
A sheet-like body of igneous rock which cuts across the bedding or structural planes of the host rock.
a tabular intrusive body that cuts across the planar structure of the surrounding rock.
Vertical sheet of intrusive igneous rock.
a sheet-like igneous body intruded into other rocks. Dykes in sedimentary rocks cross-cut bedding, unlike sills which are parallel to bedding.
a body which cuts across the country (host) rock
a sheet-like intrusive body that cuts through the surrounding country rock
a vertical or almost vertical fissure in one or more layers of basalt, in which younger lava has flown and stiffened
a vertical or near vertical igneous intrusion into surrounding rock layers
Intrusive igneous rock vertically or subvertically emplaced.
a discordant tabular body of igneous rock that was injected into and cuts across the foliation or layering of the enclosing rocks.
A sheet of intrusive rock that cuts across the surrounding rock.
an igneous intrusion which cuts across the bedding of other planar structures in the country rock
A long and relatively thin body of igneous rock that, while in the molten state, intruded a fissure in older rocks.
A vertical sheet of igneous rock filling a fissure in the rocks.
A tabular body of intrusive igneous rock, crosscutting the host strata at an oblique angle.
A crosscutting rock unit that is younger than the rocks it intrudes.