422 



MESOZOIC TIME. 



that of the Carboniferous age. The Carboniferous age ended in a 

 period of disturbance, escape of heat, as shown in consolidations and 

 metamorphism, and a general destruction of life along the Continental 

 border ; and so the period of these sandstones was closed in uplifts, 

 fractures, emissions of heat, consolidations, and destructions of life. 

 But, in the former case, the catastrophe resulted in mountain-making 

 through foldings ; in the latter, the action, though ranging along the 

 earne line of coast, from South Carolina to Newfoundland, was more 

 limited ; the surface rocks were only tilted and broken, and heat ex- 

 hibited its effects chiefly in eruptions of melted rock. 



Geography. — The position of the beds on the Atlantic border shows • 

 that this part of the continent stood nearly at its present level. The 



Fig. 735. 



y i 





7l2 l 



Map of the submerged border of the continent, off New Jersey and Long Island, with lines of equal 

 soundings in fathoms. N. Y., City of New York ; N. J., State of New Jersey ; N. H., New Ha- 

 Ten; B., Brooklyn ; St., Staten Island ; S., Sandy Hook; M.,Montauk Point ; Bl. Block Island. 



strange absence of marine deposits, along the Atlantic Border, may be 



