( Cambrian ( ( environment ( -LRB- ( ( sedimentary rock ) -RRB- ) ) ) ( more conducive ) ) )
(ROOT (NP (NP (NNP Cambrian)) (NP (NP (NP (NN environment)) (PRN (-LRB- -LRB-) (NP (JJ sedimentary) (NN rock)) (-RRB- -RRB-))) (ADJP (RBR more) (JJ conducive)))))
Cambrian environment (sedimentary rock) more conducive
(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)))))))))) (. .)))