(P17)	(Q30)
(P31)	(Q736917)
(P131)	(Q1204) (Q1546) (Q1581)
(P138)	(Q732549) (P143) (P4656) https://en.wikipedia.org/w/index.php?title=Keokuk_Limestone&oldid=906326554
(P567)	(Q18394508)
(P568)	(Q17512812)
(P973)	https://ngmdb.usgs.gov/Geolex/UnitRefs/KeokukRefs_2304.html

External Links

(P646)	/m/011169p_
(P6202)	Keokuk_2304