What is the parent rock of mylonite?
Metamorphic rocks The mylonites can be formed by converting many kinds of rocks, particularly those predominantly composed of quartz, feldspar, calcite, dolomite, sericite, and chlorite. The likely parent rocks are sandstone, granite, granodiorite, diorite, limestone, marble, and dolostone (Fig. 7.7).
What is the protolith rock of phyllite?
The protolith (or parent rock) for phyllite is shale or pelite, or slate, which in turn came from a shale protolith. Its constituent platy minerals are larger than those in slate but are not visible with the naked eye.
What is the parent rock to phyllite?
Phyllite
| Type | Metamorphic Rock |
|---|---|
| Miscellaneous | Foliation surface has a satiny sheen and crinkled appearance |
| Metamorphic Type | Regional |
| Metamorphic Grade | Low Grade (Higher than Slate) |
| Parent Rock | Shale or Mudstone |
What kind of rock is mylonite?
metamorphic rock
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism.
What is phyllite rock?
Phyllite is a foliated metamorphic rock rich in tiny sheets of sericite mica. Phyllite is a durable and soft rock and used as decorative aggregates, floor tiles, and as exterior building, or facing stone. The other uses include cemetery markers, commemorative tablets, creative artwork, and writing slates.
What is the parent rock of schist?
Metamorphic Rocks
| Metamorphic rock | Texture | Parent rock |
|---|---|---|
| Schist | Foliated | Shale, granitic and volcanic rocks |
| Gneiss | Foliated | Shale, granitic and volcanic rocks |
| Marble | Nonfoliated | Limestone, dolostone |
| Quartzite | Nonfoliated | Quartz sandstone |
What rocks are protolith?
Protoliths are usually granites, rhyolites, or arkose sandstones and metamorphism results in gneisses containing an abundance of quartz, feldspar, and biotite.
What is the texture of mylonite?
They are extremely fine-grained, but mineral fragments of the parent rock can be seen under the microscope. Most mylonites are laminated, the layers formed by different grain sizes of deformed material. These are rocks in which the texture is the result of ductile shearing or mechanical shattering of grains.
Where can mylonite be found?
Mylonite is a fine-grained rock that containes intensely flattened minerals. A boulder on the coast of Varanger Peninsula in Norway. Mylonites are foliated, but the foliation is generally passive. It means that the foliation is not controlling how the rock breaks.
What is the parent rock of shale?
Mica schist, the most common schistose rock and the second most common metamorphic rock, is composed mostly of mica (usually biotite or muscovite) and smaller amounts of quartz. The original parent rock (or protolith) of mica schist is shale.
What is the parent rock of soapstone?
Soapstone
| Type | Metamorphic Rock |
|---|---|
| Miscellaneous | Softer than fingernail; may be schistose in texture |
| Metamorphic Type | Hydrothermal |
| Metamorphic Grade | Low to Medium Grade |
| Parent Rock | Peridotite |