80 



The Upper Cretaceous Deposits of Maryland 



Cretaceous. 



IX. Section north side of Chesapeake and Delaware Canal, % mile west of 

 Summit Bridge, near Milepost t()- r >. 



Pleistocene. Feet. 



(Reworked glauconitic sand derived from Matawan and 

 containing many small pebbles 10 

 Pebble and cobble band cemented by iron oxide in 

 places 1% 



Argillaceous greensand, rich yellow in color, due to 

 weathering 4 



Gray (resembling a mixture of pepper and salt) dark 

 green glauconitic micaceous sand 24 



Gray to green glauconitic sand containing ferruginous 

 bands and nodules from % to 4 inches in diameter, 

 in which are many fossils of gastropods, pelecypods, 

 ammonites, crab claws, and sharks' teeth with occa- 

 sional crystals of gypsum 14 



I Material similar to above layer but without fossiliferous 

 nodules and bands of ironstone. Exposed to water's 

 12 



Matawan . . . 



Total 65y 2 



Section north side of Chesapeake and Delaware Canal 30 rods west of 

 Summit Bridge, just west of Milepost 116. 



Pleistocene. 



Wicomico. 



Cretaceous. 



Monmouth . 



Feet. 



(Loose coarse buff to yellow cross-bedded sand 7 

 Band of pebbles and cobbles ranging in size up to 5 

 inches in diameter in matrix of yellow sand indurated 

 by iron oxide in places 2% 



Yellowish green to chocolate-colored weathered glaucon- 

 itic sand containing flattened pellets of clay and small 

 irregular quartz pebbles 3% 



Mottled dark-greenish black to light green glauconitic 

 sand containing angular to subangular quartz pebbles 

 Vi inch in diameter and water-worn pieces of lignite, 

 some of which are 1 inch in diameter; a few fossil 

 casts of pelecypods and gastropods were noted 4 



Loose gray, buff, to yellow weathered micaceous sand . . 5 



Loose, ferruginous yellow micaceous sand containing 

 some iron crusts 4 



Light to dark green micaceous glauconitic sand 10 



.Concealed to water's edge 12 



Total 48 



