( ( ( ( formation and ) alteration ) ( of ( rocks ( in ( the earth ) ) ) ) ) ( ( s crust ) ; ) )
(ROOT (S (NP (NP (NN formation) (CC and) (NN alteration)) (PP (IN of) (NP (NP (NNS rocks)) (PP (IN in) (NP (DT the) (NN earth)))))) (VP (VBZ s) (VP (NN crust))) (: ;)))
formation and alteration of rocks in the earth s crust;
(ROOT (S (NP (NP (DT The) (NN earth) (POS 's)) (NN crust)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (JJ igneuos) (NN rock))))) (. .)))