Earth science
type: Concept
narrower: geology

paleontology
type: Concept
broader: geology

physical geology
type: Concept
broader: geology

geography/geology
type: Concept
narrower: geology

mineralogy
type: Concept
broader: geology

stratigraphy
type: Concept
broader: geology

geology
broader: Earth science
broader: geography/geology
narrower: physical geology
narrower: mineralogy
narrower: paleontology
narrower: marine geology
narrower: stratigraphy
type: Concept
definition: Geology is the scientific study of planet Earth and its history, through 4,600 million years to the present. This natural science is traditionally divided into two branches: physical geology and historical geology. [Source: Encyclopedia of Time: Science, Philosophy, Theology, & Culture; Geology]

concepts
type: Collection
type: ConceptGroup
member: geology

marine geology
type: Concept
broader: geology