Geology is a multi-disciplinary subject, which includes study of minerals (mineralogy), rocks (petrology), the structure of the Earth (structural geology), volcanic phenomena (volcanology), landforms and the processes that produce them (geomorphology and glaciology), study of fossils (paleontology), the development of sedimentary strata (stratigraphy) and the evolution of planetary bodies and their satellites (astrogeology).

Appl geology-
The application of various fields of geology to economic, engineering, water-supply, or environmental problems; geology related to the human activity
Contents of Current Applied Geology-
 Engineering Geology, Geomechanics, Foundation Engineering
 Volcanic Engineering
 Rock Mechanics
 Hydrogeology
 Disaster Geology
 Environmental Geology
 Geoinformatics
 Remote Sensing, Photogeology
 Economic Geology, Mining Geology