(S (S (SBAR (IN As) (S (BASENP (DT this) (NN water)) (VP (VP (VBZ washes)) (PP (IN against) (BASENP (DT the) (NNS rocks)))))) (COMMA ,) (S (BASENP (PRP it)) (VP (VP (VBZ dissolves) (BASENP (NN salt) (NNS compounds))) (CC and) (VP (VP (VBZ rises) (PP (IN through) (NP (BASENP (NNS fractures)) (PP (IN in) (BASENP (DT the) (VBG overlying) (NN ice)))))) (S (VP (TO to) (VP (VP (VB form) (BASENP (NNS reserves))) (ADJP (JJR nearer) (BASENP (DT the) (NN surface)))))))))) (PERIOD .))