( ( Many ( massive ( sedimentary ( rock formations ) ) ) ) ( ( contain ( thousands ( of ( thin ( , ( horizontal laminations ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Many) (JJ massive) (JJ sedimentary) (NN rock) (NNS formations)) (VP (VBP contain) (NP (NP (NNS thousands)) (PP (IN of) (NP (JJ thin) (, ,) (JJ horizontal) (NNS laminations))))) (. .)))
Many massive sedimentary rock formations contain thousands of thin, horizontal laminations.
(ROOT (S (NP (NP (DT A) (VBG defining) (NN feature)) (PP (IN of) (NP (JJ deformed) (NN sedimentary) (NNS rocks)))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP are) (RB not) (ADJP (JJ horizontal)))))) (. .)))