( Ripples ( ( ( are commonly ) ( preserved ( in ( sedimentary rocks ) ) ) ) . ) )
(ROOT (S (NP (NNS Ripples)) (VP (VBP are) (ADVP (RB commonly)) (VP (VBN preserved) (PP (IN in) (NP (JJ sedimentary) (NNS rocks))))) (. .)))
Ripples are commonly preserved in sedimentary rocks.
(ROOT (S (NP (JJS Most) (NNS fossils)) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (JJ sedimentary) (NNS rocks))) (SBAR (IN because) (S (NP (NNS organisms)) (VP (MD can) (VP (VB be) (VP (VBN preserved) (PP (IN in) (NP (JJ sedimentary) (NN rock)))))))))) (. .)))