What is geology

Geology (from Greek: γη-[ge-, "earth"] and λογος [logos, "word", "reason"]) is a science (science that studies the earth, its composition, structure, physical properties, history, and formation processes.Geologist has been helpful in determining the age of the earth which is estimated around 4.5 billion (4.5x109) years, and has determined that the Earth's crust is fragmented into tectonic plates move on the half-molten mantle (astenosfir) through a process called plate tectonics. Geologist helped find and manage existing natural resources on earth, such as petroleum, coal, and also metals such as iron, copper, and uranium and other minerals have economic value, such as asbestos, perlite, mica, phosphates, zeolites, soil clay, pumice, quartz, and silica, and also other elements such as sulfur, chlorine, and helium.Astrogeologi is the application of geological knowledge about other planets in the solar system (solar system). However, other specific terms such as selenology (the lesson of the month), areologi (lesson about the planet Mars), etc., are also used.The word "geology" was first used by Jean-André Deluc in the year 1778 and introduced as the standard term by Horace-Benedict de Saussure in the year 1779.