Editing Geology (section)

===Economic geology===
{{Main|Economic geology}}

Economic geology is a branch of geology that deals with aspects of economic minerals that humankind uses to fulfill various needs. Economic minerals are those extracted profitably for various practical uses. Economic geologists help locate and manage the Earth's [[natural resource]]s, such as petroleum and coal, as well as mineral resources, which include metals such as iron, copper, and uranium.

====Mining geology====
{{Main|Mining}}
[[Mining geology]] consists of the extractions of mineral and ore resources from the Earth. Some resources of economic interests include [[gemstone]]s, [[metal]]s such as [[gold]] and [[copper]], and many minerals such as [[asbestos]], [[Magnesite]], [[perlite]], [[mica]], [[phosphate]]s, [[zeolites]], [[clay]], [[pumice]], [[quartz]], and [[silica]], as well as elements such as [[sulfur]], [[chlorine]], and [[helium]].

====Petroleum geology====
[[File:Mudlogging.JPG|thumb|Mud log in process, a common way to study the [[lithology]] when drilling oil wells]]
{{Main|Petroleum geology}}
[[Petroleum geologist]]s study the locations of the subsurface of the Earth that can contain extractable hydrocarbons, especially [[petroleum]] and [[natural gas]]. Because many of these reservoirs are found in [[sedimentary basin]]s,<ref>{{Cite book |author=Selley |first=Richard C. |title=Elements of petroleum geology |publisher=Academic Press |year=1998 |isbn=978-0-12-636370-8 |location=San Diego, California}}</ref> they study the formation of these basins, as well as their sedimentary and tectonic evolution and the present-day positions of the rock units.