( again ( , ( ( ( the consequence ) ( of ( water erosion ) ) ) ( , ( ( ice ( expanding ( in ( ( ( crevices , ) and ) ( the sun ) ) ) ) ) . ) ) ) ) )
(ROOT (S (ADVP (RB again)) (, ,) (NP (NP (DT the) (NN consequence)) (PP (IN of) (NP (NN water) (NN erosion)))) (, ,) (VP (VBZ ice) (S (VP (VBG expanding) (PP (IN in) (NP (NP (NNS crevices)) (, ,) (CC and) (NP (DT the) (NN sun))))))) (. .)))
again, the consequence of water erosion, ice expanding in crevices, and the sun.
(ROOT (S (NP (NN Ice) (NN wedging)) (VP (VBZ occurs) (SBAR (IN because) (S (NP (NN water)) (VP (VBZ expands))))) (. .)))