( ( ( Continental Lithosphere ) ( The ( continental lithosphere ) ) ) ( ( is ( ( ( ( about 150 ) kilometers ) ( -LRB- ( ( 93 miles ) -RRB- ) ) ) ( thick ( with ( ( a ( low-density ( ( crust and ) upper-mantle ) ) ) ( that ( are ( permanently buoyant ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Continental) (NNP Lithosphere)) (NP (DT The) (JJ continental) (NN lithosphere))) (VP (VBZ is) (NP (NP (NP (QP (RB about) (CD 150)) (NNS kilometers)) (PRN (-LRB- -LRB-) (NP (CD 93) (NNS miles)) (-RRB- -RRB-))) (ADVP (JJ thick) (PP (IN with) (NP (NP (DT a) (NN low-density) (NN crust) (CC and) (NN upper-mantle)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (RB permanently) (JJ buoyant)))))))))) (. .)))
Continental Lithosphere The continental lithosphere is about 150 kilometers (93 miles) thick with a low-density crust and upper-mantle that are permanently buoyant.
(ROOT (S (NP (NP (NP (DT The) (NN earth) (POS 's)) (JJ continental) (NN crust)) (, ,) (PP (IN on) (NP (NN average))) (, ,)) (VP (VBZ is) (ADJP (NP (CD 35) (NNS kilometers)) (JJ thick))) (. .)))