Rock cycle is defined as the changes involved in the different types of rocks, however the rock cycle illustrates and explains how the three types of rocks are related to each other, and how processes change from one type of rock to another over time. The rock cycle takes place due to two forces: …
What is weathering? Weathering is defined as a process by which the rocks on the surface of the earth are broken down into smaller pieces due to running water, ice, snow or frost, variation of temperature and pressure or due to chemical (dissolution) action on the materials. After rock is broken down into smaller …
What is Igneous Rock Igneous rock is one of the three main types of rocks; other ones are sedimentary rocks and metamorphic rocks. Igneous rock is formed from the cooling and solidification of molten magma. Igneous rocks are derived from the Latin word Ignis which means of fire or heat, the name best describes these rocks …
What are Sedimentary Rocks? Sedimentary rocks are formed from the accumulation of sediments by water, ice or wind. A wide variety of live forms exist in sedimentary environments however, sedimentary rocks contain evidence of life in form of fossil. Fossil and fragments of fossil can build up to form limestone. Sedimentary rocks …
What are metamorphic rocks? Metamorphic rocks are rocks whose structure and appearance have been affected or changed by greater heat, pressure and chemical processes, usually while buried deep below the Earth’s surface or where tectonic plates meet. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of these …
The three main types of rocks include Igneous, sedimentary and metamorphic rocks. What is a Rock? A rock is any substance that forms part of the earth crust. The solid substance may be as hard as granite or may even be as soft as mud. The earth crust consists of various types rocks …
Continental driftis defined as the movement of the Earth’scontinentsrelative to each other, appearing to “drift” across the ocean bed. Continental drift theory was initially proposed byAbraham Orteliusin 1596 and was later developed fully by a geophysicist and meteorologist,Alfred Wegenerin 1912. This theory explains that the earths continent move gradually over the surface …
Gully erosion is defined as the removal of the top soil along drainage channels by surface water runoff; it is the type of soil erosion that consists of an open, incised and unstable channel generally more than 30cm deep. Gully erosion may occur as a result activity of man on the land …