ALONG SHORE 



143 



ing cape or V-shaped promontory that stretches 

 out into the sea. It is the outlying guard, and 

 BO long as it stands it protects what is behind it. 

 When the sea finally wears away the point it 

 is likely to leave a sunken base but a few feet 

 below the surface, over which the waves break in 

 spray ; or perhaps there remains one of those 

 fantastic pinnacles or pillars, usually called 

 Devil's Pulpits, which may be seen along almost 

 any rocky coast. At times again, waves wear- 

 ing upon a soft portion of a rock hollow out 

 caverns or perhaps passages clear through the 

 promontory, into which the water rushes and is- 

 sues on the other side in a tumult of spray. When 

 the supporting sides of the cavern are of sturdy 

 material, the roof may remain after the rest of the 

 promontory has been eaten through, in which 

 case we have the natural bridge or arch a not 

 infrequent sight on rocky coasts, and certainly 

 a picturesque one. A more common way, how- 

 ever, of wearing the rock is by the water fol- 

 lowing the seams and cleavages opened by frost. 

 The savage thrust of the sea through these 

 cracks sometimes results in the "spouting- 

 horn," which flings up its jet of foam with 

 great force, and under sunlight with surpris- 

 ing beauty of effect. Still more common is the 



Rock forms 

 made by 

 water. 



bridges, 



a nd cav- 

 ern*. 



