( Kansas ( ( is ( underlain ( by ( ( a sequence ) ( of ( ( horizontal ( to ( gently ( westward dipping ) ) ) ) ( sedimentary rocks ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Kansas)) (VP (VBZ is) (VP (VBN underlain) (PP (IN by) (NP (NP (DT a) (NN sequence)) (PP (IN of) (NP (ADJP (JJ horizontal) (S (VP (TO to) (VP (ADVP (RB gently)) (ADVP (RB westward)) (VB dipping))))) (JJ sedimentary) (NNS rocks))))))) (. .)))
Kansas is underlain by a sequence of horizontal to gently westward dipping sedimentary rocks.
(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)))))) (. .)))