About: rock layer

Premodifier: rock
Head noun: layer

Same concepts
http://dbpedia.org/resource/Stratum

Broader concepts

label	provenance	confidence
rock layer	isap:370509217	0.679055
layer	isap:370509518	0.377704
fossil	isap:155787640	0.330173

Narrower concepts

label	provenance	confidence
rock layer	isap:370509217	0.679055
limestone	isap:15064825	0.294920
aquifer	isap:35082807	0.211602
animal	isap:116215833	0.149090