Assertion: sponge's skeleton | /r/HasProperty | preserved in precambrian rocks
Facets:
value: abundantly
type: DEGREE
Source sentences:
text: Although we recognize that the absence of evidence is not evidence of absence, it would be a remarkable failure of the fossil record if a group of biomineralized animals is completely missing from the Precambrian, given that extremely delicate and fragile biomineralic scales43 and weakly biomineralized skeletons such as Cloudina44 are abundantly preserved in Precambrian rocks.