Significats de metamorphic rocks en anglès

These few examples must suffice of the great class of metamorphic rocks.

So again the making out of cleavage and the foliation of the metamorphic rocks.

There is also a class of rocks, called metamorphic rocks, including some kinds of marble.

Why do metamorphic rocks appear on the surface to-day?

Anthracite coal occurs in folded and metamorphic rocks.

How do the Triassic sandstones and shales compare in hardness with the igneous and metamorphic rocks about them?

The and sands and limy oozes now changed to gneisses, schists, marbles, quartzites, slates, and other metamorphic rocks.

The desert sand over metamorphic rocks formed about 2.5 to 4 billion years ago.

The tract lying to the north-west of this dislocation is composed of the metamorphic rocks of the Eastern Highlands.

This glacial drift reposes near the mountains on ancient metamorphic rocks and farther from them on marine Pliocene strata.

When an igneous or sedimentary rock is exposed to heat and pressure, you get what we call metamorphic rocks.

These pseudo-fragments of shale will perhaps explain, in some cases, the origin of apparently extraneous fragments in crystalline metamorphic rocks.

Geology.--Thegreater part of the county is composed of crystalline schists belonging to the metamorphic rocks of the Eastern Highlands.

Veins of auriferous quartz are found throughout the central chain, the richest lodes being encountered in metamorphic rocks near crystalline formations.

This result indicates that the geological source of fluoride in groundwater is related to the mineral composition of metamorphic rocks and granitoids.

The metamorphic rocks have been invaded by igneous materials, some before, and by far the larger series after the folding of the strata.