( ( Most ( sedimentary rocks ) ) ( ( are ( ( ( ( laid down ) ( in ( horizontal layers ) ) ) , ) ( with ( ( the ( oldest beds ) ) ( at ( the bottom ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJS Most) (NN sedimentary) (NNS rocks)) (VP (VBP are) (VP (VBN laid) (PRT (RP down)) (PP (IN in) (NP (JJ horizontal) (NNS layers))) (, ,) (PP (IN with) (NP (NP (DT the) (JJS oldest) (NNS beds)) (PP (IN at) (NP (DT the) (NN bottom))))))) (. .)))
Most sedimentary rocks are laid down in horizontal layers, with the oldest beds at the bottom.
(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)))))) (. .)))