Some rocks, similar to limestone are made of minerals that aren’t flat or elongate. Another sort of metamorphism, contact metamorphism, happens when hot igneous rock intrudes into some pre-present rock.
The pre-present rock is essentially baked by the warmth, changing the mineral structure of the rock with out addition of pressure. Some kinds of metamorphic rocks — granite gneiss and biotite schist are two examples — are strongly banded or foliated. (Foliated means the parallel association of sure mineral grains that provides the rock a striped appearance.) Foliation types when pressure squeezes the flat or elongate minerals within a rock so that they turn into aligned. These rocks develop a platy or sheet-like construction that reflects the course that strain was utilized.
Top Of The Rock Road
Sediments composed of weathered rock lithify to kind sedimentary rock, which then turns into metamorphic rock underneath the pressure of Earth’s crust. When … Read More