( ( The stratigraphy ) ( here ( ( ( is not ) ( layer cake ) ) . ) ) )
(ROOT (S (NP (DT The) (NN stratigraphy)) (ADVP (RB here)) (VP (VBZ is) (RB not) (NP (NN layer) (NN cake))) (. .)))
The stratigraphy here is not layer cake.
(ROOT (S (NP (PRP We)) (VP (VBP call) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NN rock) (NNS layers)))) (ADVP (RB stratigraphy))) (. .)))