( ( Calcite ( -LRB- ( ( calcium carbonate ) -RRB- ) ) ) ( ( is ( ( a mineral ) ( that ( often ( ( forms ( ( veins and ) incrustations ) ) ( in ( rock fractures ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Calcite)) (PRN (-LRB- -LRB-) (NP (NN calcium) (NN carbonate)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT a) (NN mineral)) (SBAR (WHNP (WDT that)) (S (ADVP (RB often)) (VP (VBZ forms) (NP (NNS veins) (CC and) (NNS incrustations)) (PP (IN in) (NP (NN rock) (NNS fractures)))))))) (. .)))
Calcite (calcium carbonate) is a mineral that often forms veins and incrustations in rock fractures.
(ROOT (S (NP (JJ Carbonate) (NNS minerals)) (VP (VBP are) (ADVP (RB often)) (VP (VBN found) (SBAR (WHADVP (WRB where)) (S (NP (NNS seas)) (ADVP (RB once)) (VP (VBD covered) (NP (DT the) (NN land))))))) (. .)))