( Silica ( ( precipitates ( at ( the ( surface ( to ( ( ( ( ( ( form either ) geyserite ) or ) sinter ) , ) ( creating ( ( ( ( ( ( ( the ( massive geyser ) ) cones ) , ) ( ( the ( scalloped edges ) ) ( of ( hot springs ) ) ) ) , ) and ) ( ( the ( ( seemingly barren ) landscape ) ) ( of ( geyser basins ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Silica)) (VP (VBZ precipitates) (PP (IN at) (NP (DT the) (NN surface) (S (VP (TO to) (VP (VB form) (CC either) (VB geyserite) (CC or) (VB sinter) (, ,) (S (VP (VBG creating) (NP (NP (NP (DT the) (JJ massive) (NN geyser)) (NP (NNS cones))) (, ,) (NP (NP (DT the) (JJ scalloped) (NNS edges)) (PP (IN of) (NP (JJ hot) (NNS springs)))) (, ,) (CC and) (NP (NP (DT the) (ADJP (RB seemingly) (JJ barren)) (NN landscape)) (PP (IN of) (NP (NN geyser) (NNS basins))))))))))))) (. .)))
Silica precipitates at the surface to form either geyserite or sinter, creating the massive geyser cones, the scalloped edges of hot springs, and the seemingly barren landscape of geyser basins.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN magma)) (VP (VBZ heats) (NP (NN groundwater))))) (, ,) (NP (PRP it)) (VP (MD may) (VP (VB come) (PP (TO to) (NP (NP (DT the) (NN surface)) (PP (IN as) (NP (NP (DT a) (JJ hot) (NN spring)) (CC or) (NP (DT a) (NN geyser)))))))) (. .)))