Petrography

https://www.wikidata.org/wiki/Q289600

Field Hierarchy

Parent
Biology 36.5M papers	Chemistry 29.4M papers	Geology 10.5M papers	Paleontology 5.6M papers
Mineralogy 866k papers		Geochemistry 809k papers
Current
Petrography 27k papers
Child
Maceral 4,734 papers	Inertinite 2,349 papers	Liptinite 1,099 papers

Trends

Notes

History