WebWhen the rock cools, the intricate folds remain. Weathering and erosion of the overburden can allow the intricately folded rocks to be exposed at the surface of the Earth. 8. heat, pressure, chemically active fluids 9. Confining pressure is the pressure on rocks (equal in all directions) at great depth inside the Earth. 10. WebYes, because such features can withstand low temperatures and pressures but will be destroyed in higher metamorphic grades. 5. ________ can produce intricately folded rocks. Differential stress 6. Generally speaking, how does the chemical composition of most metamorphic rocks compare to that of the parent rock?
Metamorphic Rocks Flashcards Chegg.com
WebA lamination which develops in metamorphic rocks as a result of segregation of different minerals into layers. Rocks tend to break along these laminations. Fault. A break (fracture) in the earth's crust along which has been displaced rock on one side of the break relative to rock on the other side. Feldspar. WebRocks begin to partially melt when they reach a combination of sufficiently high temperatures (> 650°C) and pressures (>34MPa). Some rocks have compositions that produce more melt than others at a given temperature, a rock property called fertility. companies in lowell michigan
Exam #3 Flashcards Chegg.com
WebNumerous closely spaced fold hinges may produce a lineation in highly deformed rocks. This structure is called a crenulation lineation. Fold axial surfaces: Numerous closely spaced fold axial surfaces define a fabric called called crenulation cleavage, because the axial surfaces may be planes of weakness along which a rock tends to split. WebThe type of rock that a metamorphic rock used to be, prior to metamorphism, is called the protolith. During metamorphism the mineral content and texture of the protolith are changed due to changes in the physical and chemical environment of the rock. Metamorphism can be caused by burial, tectonic stress, heating by magma, or alteration by fluids. WebSep 11, 2024 · Folds are geologic structures created by plastic deformation of the Earth’s crust. To understand how folds are generated, take a piece of paper and hold it up with a hand on each end. Apply compressional forces (push the ends towards each other). You have just created a fold (bent rock layers). Depending on how your paper moved, … eat natural head office