1. Organically formed sedimentary rocks are the remains of pro-existing plants and animals that have been joined together by pressure e.g. petroleum, coal, lignite etc. 2. Non classic sedimentary rocks are chemically formed rocks, which are precipitated rocks. Precipitation takes place when the water in the solution has been dried off e.g. common salt (sodium …
Sedimentary rocks possess layers or strata; hence they are referred to as stratified rocks. They have fossils and is coarse in texture. They are not resistant to erosion. A good number of sedimentary rocks are soft and can easily be broken down. They vary in colours from white as in limestone to black asin coal. …
NOTE: Locations/areas where Igneous rocks can be found are 1. Eastern zone =Abakaliki, Nsukka, Okigwe etc. 2 Northern zone = Benue, Plateau, Zaria, Ilorin, Bauchi etc 3. Western zone =Abeokuta, Qyo, Ondo, Ado Ekiti.
Igneous rocks are quarried for road construction They are used for building of houses. They generate revenue as gravel when broken into pieces. They are polished as monuments and graveyard stones.
Igneous rocks have a crystalline nature. This is why they glitter in the sun or look glassy in appearance. The crystalline nature of igneous rocks shows that they contain crystals, Igneous rocks are usually very resistant to erosion and other climatic elements. They are very hard and contain no animal or plant remains (fossils). Igneous …
1. Volcanic (Extrusive) Igneous Rock: This is the type of igneous rock formed as a result of pressure which forces the molten magma to the earth surface. Volcanic igneous rocks cools and solidifies on the earth surface. 2. Plutonic (intrusive) Igneous Rock: This is the type of Igneous rock that is formed with the earth …