A lopolith is a large igneous intrusion which is lenticular in shape with a depressed central region.

Cumulate harzburgite is found in some large layered igneous intrusions.

This typical mushroom-shaped laccolith is one of the largest intrusions of this type in the world.

It is part of a large circular igneous intrusion that was placed along the Fraser Fault 16 to 21 million years ago.

This can change the composition of the melt in large intrusions, leading to differentiation.

Investigating magma conditions of large layered ultramafic intrusions is more fraught with problems.

The Grand Reef Mine is located near a large granitic intrusion.

Generally nickel laterites require very large olivine-bearing ultramafic intrusions.

The central section or upper sections of many large ultramafic intrusions are poorly layered, massive gabbro.

Chromitite layers occur commonly in large mafic layered intrusions.