Maryland Gteological Survey 



75 



IX. Section at Federal Hill, Baltimore, at Baltimore Terra Cotta Works, 

 Covington and O^tend Streets and beginning about 70 feet above tide. 



Cretaceous. 



Patapsco 



Patuxent 



Feet. Inches. 

 'Sandy clay, sand and ferruginous sandstone, 



with silicified wood and red clay laminae... 5 10 

 Carbonaceous clay with flakes of white and 



brown iron ore 1 4 



" Alum clay," " yellow horse clay," yellow 

 ochre, and variegated clay, at times sandy 



and containing iron crusts and tubes 34 6 



Bluish clay and potters clay with semi-erect 

 stumps and horizontal logs of lignite, im- 

 pregnated with pyrite. Occasional fern im- 

 pressions 7 6 



Darker blue slaty clay, without fossils 3 



Gray slaty clay, with profusion of plant re- 

 mains ^ 2 



Sandy clay 2 



Indurated ferruginous layers % 



Commercial red ochre % 



Iron sandstone % 



White sand 7 



Pine white sand with white clay balls 4 



Building sand and indurated gravel, near tide. 4 



The well at the Torsch packing house carries 

 this section downward (allowing for dip) as 

 follows : 



White clay 15 



Arenaceous white clay 15 



Sand rock 5 



White impervious clay 15 



White water-bearing sand 22 



Total about 145 



X. Section at " Lower Smith's Banks," 1 mile south of Hawkins Point, Anne 



Arundel County. 



Feet. 



PlGlstOCGHG 



Talbot Brown massive and stratified loam with a few well- 

 rounded pebbles toward base 6 



Cretaceous. f Variegated argillaceous sand and sandy clay, iron 



crusts toward and at base where there is a local 



unconformity 4-8 



Extremely dense, massive and tough, richly variegated 



Patapsco 



clays 



20 



Continued downward by an artesian well at Ft. Armi- 

 stead, Hawkins Point, as follows: 



Pink sandy clay 40 



Pine buff sand fO 



White and buff mottled clay lo 



Total 



110 



* See list of species in Tables of Distribution. 



