Subject	sedimentary rock layer
Predicate	provide
Object	clues to a fossil age
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.3556
Neighborhood Sigma	0.4523
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source sedimentary rock layers provide clues to a fossil age 1 Answers.com Questions