The three basic types of rocks are igneous, metamorphic and sedimentary. Sedimentary rocks make up most of the rocks on the earth and are formed when bits of rock, soil or organic matter settles and accumulates. Plant and animal fossils can be found in sedimentary rock.

There are many subtypes of sandstone: arkose, orthoquartzite, grit, flagstone, graywacke, and many others. Sandstone is among the most widespread sedimentary rocks. The most abundant constituent mineral in most sandstones is quartz.^ Shale is a laminated rock consisting of mostly clay minerals. Shale is a lithified mud.

Sedimentary rocks are formed from pre-existing rocks. Visit to learn in details about the types of sedimentary rock (Organic, Clastic and Chemical Sedimentary Rocks) along with its uses and interesting facts.

Rocks are composed primarily of grains of minerals, which are crystalline solids formed from atoms chemical bonded into an orderly structure.: 3 Some rocks also contain mineraloids, which are rigid, mineral-like substances, such as volcanic glass,: 55, 79 that lacks crystalline structure. The types and abundance of minerals in a rock are determined by the manner in which it was …

ADVERTISEMENTS: Weathering of rocks leads to formation of sand, silt, and clay. On the basis of their mechanisms, following are the three types of weathering: 1. Physical Weathering 2. Chemical Weathering 3. Biological Weathering. Type # 1. Physical Weathering: Physical weathering of rocks is the breakdown of rocks into smaller size particles by pure mechanical […]

Rocks can be classified in to three main groups - igneous, sedimentary and metamorphic. These three different rock types can be found in distinct areas of the UK. Igneous rocks - …