For example: metabasalt, metagraywacke, meta-andesite, metagranite. 5. Foliated refers to the parallel alignment of grains in the metamorphic rock. In addition to these conventions, certain non-foliated rocks with specific chemical compositions and/or mineral assemblages are given specific names. This causes the minerals in the original rock to reorient themselves with the long and flat minerals aligning perpendicular to the greatest pressure direction. Non-foliated means that the metamorphic rock does not have any parallel structure visible. These are as follows: Some non-foliated rocks will simply lack minerals that give it the ability to have any layering or banding. There are several ways that non-foliated rocks can be produced. Foliated Rocks. Non-foliated metamorphic rocks do no longer have a platy or sheet-like shape. When it forms, the calcite crystals tend to grow larger, and any sedimentary textures and fossils that might have been present are destroyed. Low grade: Metabasalt is metamorphosed basalt! Also other namingâs are steatite or soaprock. Soapstone is a type of talc-schist metamorphic rock. Soapstone. 4. Schist, gneiss, slate and phyllite are examples of foliated rocks, which have a banded or layered appearance. An example of a non-foliated metamorphic rocks is a quartzite or marble. Some rocks, including limestone are product of minerals that arenât flat or elongate. A Metamorphic rock with a texture that gives the rock a layered apperance is a Foliated Metamorphic Rock. Some examples of non-foliated metamorphic rocks include quartzite, marble, amphibolite and hornfels. There are numerous ways that non-foliated rocks may be produced. website, the Foliated and Non-Foliated Metamorphic Rock Chart, and the images provided in Canvas. Max Robles 11/3/20 To identify the rock and itâs properties. Formation. Complete the remaining sections of the lab worksheet. Metamorphic rocks that form under either low-pressure conditions or just confining pressure do not become foliated . marble. Save and upload the completed lab worksheet to Canvas. Examples of complete descriptions of foliated metamorphic rocks include: foliated, nonlayered, very fine grained for slate, foliated, layered, coarse grained for gneiss, and foliated, nonlayered, fine grained for phyllite. It is sometimes called greenstone, or greenschist if it is foliated. Non-foliated rocks form through recrystallization of single-mineral sedimentary rocks, usually those that have been touched by magma. Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance. This rock is usually non-foliated and sometimes you might find foliated pieces of it. Foliated textures are further described on the basis of the grain (crystal) size in the rock. If the rock is non-foliated, then it does not have a type of foliation. They have a non-banded and non-layered appearance. Quartzite and Anthracite are other examples of non-foliated rocks. A Metamorphic rock that does not have a layered apperance is a Non-Foliated Metamorphic Rock. The mineral chlorite gives it a green color. Examples of these non-foliated metamorphic rocks are marble and quartzite. Subsequently, question is, why are some metamorphic rocks not foliated? Though banding or layering is not present, non-foliated metamorphic rocks have some very nice patterns formed from the minerals contained within them. An example of a foliated metamorphic rock is a mica schist. Foliated metamorphic rocks are formed within the Earth's interior under extremely high pressures that are unequal, occurring when the pressure is greater in one direction than in the others (directed pressure). No matter how much pressure you apply, the grains will not align! Some examples of non-foliated metamorphic rocks are marble, quartzite, and hornfels. Marble is metamorphosed limestone. The extensively known example of non-foliated metamorphic rock is a marble. Gneiss and Schist are examples of foliated rocks. Examples of nonfoliated rocks are quartzite, marble â¦