( ( ( ( Solana ( Beach shoreline ) ) and ) beaches ) ( ( have ( ( ( eroded ( over ( ( a period ) ( of time ) ) ) ) , ) ( ( ( leaving ( ( thin stretches ) ( of sand ) ) ) ( -LRB- ( ( at ( low tide ) ) -RRB- ) ) ) ( wedged ( between ( ( waves and ) ( towering bluffs ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Solana) (NNP Beach) (NNP shoreline)) (CC and) (NP (NNS beaches))) (VP (VBP have) (VP (VBN eroded) (PP (IN over) (NP (NP (DT a) (NN period)) (PP (IN of) (NP (NN time))))) (, ,) (S (VP (VBG leaving) (NP (NP (JJ thin) (NNS stretches)) (PP (IN of) (NP (NN sand)))) (PRN (-LRB- -LRB-) (PP (IN at) (NP (JJ low) (NN tide))) (-RRB- -RRB-)) (S (VP (VBN wedged) (PP (IN between) (NP (NP (NNS waves)) (CC and) (NP (JJ towering) (NNS bluffs)))))))))) (. .)))
Solana Beach shoreline and beaches have eroded over a period of time, leaving thin stretches of sand (at low tide) wedged between waves and towering bluffs.
(ROOT (S (NP (NNP Low) (NN energy)) (VP (VBZ causes) (S (NP (NNS waves)) (VP (TO to) (VP (VB bring) (NP (NN sand)) (PRT (RP up)) (PP (IN onto) (NP (NP (DT the) (NN beach)) (PP (IN during) (NP (NNS summers))))))))) (. .)))