migmatite

The Opinaca belt is characterized by metagreywacke, derived migmatite and granite.

Rocks typical of the region include schist, amphibolite, gneiss, migmatite, and granite.

At its base is mica schist, with some gneiss and migmatite formed from sediments older than the Permian.

These cross-cutting foliations indicate that the migmatite has undergone at least two periods of ductile deformation.

The southern three quarters of the region consists of metamorphic rock such as gneiss, schist, mica, and migmatite.

The remarkable migmatite of the Chelan and Skagit areas in Washington are well known in geologic circles.

Although made of metamorphic rock, the mountain is actually composed of migmatite, metamorphosed at higher temperatures than gneiss but not sufficiently melted to become granite.

Structures in the migmatite include folds and foliations; the foliations cut across both limbs of earlier-phase folds.

Immediately south of Voyageurs National Park and extending to the Vermilion fault is a broad transition zone that contains migmatite.

The following study is from Percival (2006): The Quetico subprovince consists dominantly of greywacke, derived migmatite and granite.

A melanosome in geology refers to the dark, mafic mineral bands formed in migmatite which is undergoing eutaxitic melting; probably to form granite.

The ridge is divided between two different rock formations, one made up of granitoid gneiss, the other of mixed gneiss and different kinds of migmatite.

Ptygmatic folds can occur restricted to compositional zones of the migmatite, for instance in fine-grained shale protoliths versus in coarse granoblastic sandy protolith.

These 50-100 km wide belts of metagreywacke, migmatite and derived granite appear to represent thick syn-orogenic sequences that were deposited, deformed and metamorphosed during collisional orogeny.

The Collingwood area experienced the highest grade of metamorphism with garnet-mica schist, mica schist and garnet-mica-kyanite gneiss present, and enough heat to form veins of migmatite.

Felsic gneiss and granite migmatite, interlayered with supracrustal rocks and intruded by granodiorite, is intercalated in places with the supracrustal rocks of the greenstone belt.

But his own invocations of discordant batholiths, mosaic conglomerates, plagioclase crystals, stratiform gabbros, not to mention migmatite, tincalconite, szaibelyite and phlogopite, don't send shivers through my bones.

Metamorphic conditions in the English River range from middle amphibolite facies near the margins, to low-pressure granulite facies, coinciding with widespread generation of migmatite and diatexite at 2.691 Ga.

Just to the south of La Châtre, some twelve kilometres south of Vic, the Variscan-faulted rocks of the Massif Central begin with Cambrian/Ordovician migmatite.

A U-Pb zircon age of a migmatite, from the Nellore migmatitic domain, was determined to be 1,700 Ma indicating a new age for migmatization in the Nellore belt.

In some places, mixtures of older intrusive rocks and the original oceanic rocks have been distorted and warped under intense heat, weight and stress to create unusual swirled patterns known as migmatite, appearing to have been nearly melted in the procedure.

Deposits of these rocks appear along fault lines south of Yaoundé, where schists and quartzites are found; near the Dja River, where limestone and schists occur; and along the Ntem River, where gneiss, granite, mica, migmatite, and schists occur.