Foliated Metamorphic Rocks Example – metamorphism of a shale, made up initially of clay minerals and quartz all of clay or silt size. Slate – Slates form at low metamorphic grade by the growth of fine grained chlorite and clay minerals.

A very fine-grained metamorphic rock (usually developed from clay-rich sediments) exhibiting perfect planar layering and perfection of splitting into layers (slaty cleavage) is slate. Such rocks are normally rich in micas and chlorites.

Phyllite is a foliated metamorphic rock that is made up mainly of very fine-grained mica.

Low grade metamorphic rocks tend to characterized by an abundance of hydrous minerals, minerals that contain water within their crystal structure. Examples of low grade hydrous minerals include clay, serpentine, and chlorite.

There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water.

Rocks can be divided into three basic classifications: igneous, sedimentary, and metamorphic. The following tests are used by experts to classify rocks: Hardness Test – Minerals are scaled in range from 1 to 10, with 1 being softest and 10 hardest.

A rock is a naturally occurring solid. It is made of minerals (which are crystalline), or other mineral-like substances. That means the Earth’s crust is made of rock. The different minerals in the rocks make different kinds of rock. Rock is often covered by soil or water.

Name the three major classes of rocks. Answer. A rock is an aggregate of one or more minerals. The earth’s crust is composed of rocks. • Metamorphic rocks.

Chemical weathering: (i) The decomposition of rocks by chemical process is called chemical weathering. (ii) Chemical weathering results from the action of weak acids and gases like oxygen, carbon dioxide, hydrogen. (iii) Chemical weathering produces a chemical change in the minerals of rocks.

Marble is made of calcite crystals (white) and some colored grains of mica inclusions; the grains in a marble are locked together like jigsaw puzzle pieces.

A mineral is a naturally occurring organic and inorganic substance, having an orderly atomic structure and a definite chemical composition and physical properties. A mineral is composed of two or more elements. But, sometimes single element minerals like sulphur, copper, silver, gold, graphite etc. are found.

Answer. Answer: Because Minerals are important for our body to stay healthy.

Minerals are those elements on the earth and in foods that our bodies need to develop and function normally. Those essential for health include calcium, phosphorus, potassium, sodium, chloride, magnesium, iron, zinc, iodine, chromium, copper, fluoride, molybdenum, manganese, and selenium.

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Igneous rocks are formed when magma cools in the Earth’s crust, or lava cools on the ground surface or the seabed.

rock noun (STONE) B1 [ C or U ] the dry solid part of the earth’s surface, or any large piece of this that sticks up out of the ground or the sea: Mountains and cliffs are formed from rock.