( ( The ( Interior ( ( Plains and ) Lowlands ) ) ) ( ( are ( covered ( by ( ( a blanket ) ( of ( ( nearly ( horizontal strata ) ) ( of ( sedimentary rocks ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ Interior) (NNPS Plains) (CC and) (NNPS Lowlands)) (VP (VBP are) (VP (VBN covered) (PP (IN by) (NP (NP (DT a) (NN blanket)) (PP (IN of) (NP (NP (RB nearly) (JJ horizontal) (NN strata)) (PP (IN of) (NP (JJ sedimentary) (NNS rocks))))))))) (. .)))
The Interior Plains and Lowlands are covered by a blanket of nearly horizontal strata of 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)))))) (. .)))