( ( ( ( ( Eskers ( were ( ( deposited ( by ( meltwater ( stream channels ) ) ) ) ( like ( kames were ) ) ) ) ) , ) but ) ( ( unlike kames ) ( , ( eskers ( were ( deposited ( beneath ( the ( ice sheets ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Eskers)) (VP (VBD were) (VP (VBN deposited) (PP (IN by) (NP (NN meltwater) (NN stream) (NNS channels))) (PP (IN like) (NP (NP (NNS kames)) (VP (VBD were))))))) (, ,) (CC but) (S (PP (IN unlike) (NP (NNS kames))) (, ,) (NP (NNS eskers)) (VP (VBD were) (VP (VBN deposited) (PP (IN beneath) (NP (DT the) (NN ice) (NNS sheets)))))) (. .)))
Eskers were deposited by meltwater stream channels like kames were, but unlike kames, eskers were deposited beneath the ice sheets.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN esker)) (VP (VBZ is) (NP (NP (DT a) (JJ winding) (NN ridge)) (PP (IN of) (NP (NN sand))) (SBAR (S (VP (VBD deposited) (PP (IN by) (NP (NP (DT a) (NN stream)) (PP (IN of) (NP (NP (NN meltwater)) (VP (VBN called))))))))))) (. .)))