84 



The Upper Cretaceous Deposits of Maryland 



XX. Section two-tenths of a mile east of wharf, Round Bay, Severn River. 



Cretaceous. Feet. 



f Green, sandy clay, with brown and yellow sand 6 



Chocolate-colored sandy clay, weathered on surface to 



Matawan. . J buff and yellow, grading into member below 6 



j Black sandy, glauconitic and micaceous clay, massive. . 12 

 [iron crust. 

 Magothy Very coarse sand, angular and cross-bedded, with con- 

 siderable lignite 6 



Total 30 



XXI. Well at the U. S. Naval Academy. Anne Arundel County, Md. 



Recent 



Eocene. 



Aquia 



Cretaceous. 

 Matawan . 



Magothy. . 



Raritan. 



Patapsco . 



Feet. 



. Made ground 0-20 



f Coarse orange sand with some clay and bits of shells 20-40 

 "\ Coarse greenish to orange sand with some clay 40-60 



. . Fine greenish sand and dark clay 60-140 



fVery tough drab clay 140-180 



\ Medium gray sand with streaks of light-colored clay; 



[_ sand water-bearing 180-220 



Tough clay with fine white sand 220-250 



Fine sand with flowing water 250-270 



Coarse water-bearing sand; flowing water 270-306 



Tough red clay 306-340 



Pink and red clay with coarse sand 340-360 



Coarse brownish sand, water-bearing 360-400 



Coarse light buff sand, water-bearing 400-415 



Pink clay containing gravel 415-435 



Crust of iron ore 435 



Vari-colored sand, water-bearing 435-465 



Crust of iron ore 465 



Vari-colored sand, water-bearing 465-510 



Crust of iron ore 510 



Dark-blue clay 510-516 



Very tough red or pink clay 516-548 



Crust of iron ore 524 and 545 



Yellow sand, lower portion coarse and water-bearing. 548-583 



Pink clay 583-587 



Coarse sand and gravel — pebbles y 2 inch in diameter 

 —large flow of water 587-601 



Very hard rock. 



601 



