76 



The Lower Cretaceous Deposits of Maryland 



XI. Section at " Deep Ditch," Schoolhouse Hill, Baltimore County, beginning 



230 feet above tide. 



Cretaceous. 

 Patapsco 



Arundel 



Feet. 



10 



50 



Patuxent 



. Argillaceous sand, more or less iron-stained, with 

 variegated clay and ferruginous crusts; ash-colored, 

 lignitic and somewhat indurated toward the base .... 

 'Slightly indurated, ferruginous ledge, with leaf im- 

 pressions and casts of cones 



Drab-colored clays, with beds of lignite and white and 

 brown iron ore, containing occasional fern impres- 

 sions; teeth and bones of dinosauria; basal ferru- 

 ginous ledge. Extensively mined for iron 



Compact yellowish, reddish and variegated sand, lo- 

 cally carbonaceous; brown clay containing flakes of 

 iron ore (hydrous oxide) ; lead-colored clay with 

 indeterminate fragments of plants; ferruginous sand- 

 stone ledge with " pipe ore " (corrugated iron stone), 

 silicified trunks of Cycadeoidea marylandica (Font.) 

 Ward in situ 



Dense jointed clay of great variety and delicacy of tint, 

 red, liver-colored, and white predominating; "paint 

 rock" (red ochre) and lenses of coarse hard sandy 

 arkosic gravel with balls of white clay and silicified 

 wood 20 



Cross-bedded sand slightly carbonaceous 10 



'-Unknown, about 3(> 



30 



Crystallines .... Gneiss, exposed near Arbutus . 



Total 151 



XII. Section of " Red Stone " Baltimore and Ohio Railway cutting near Lans- 

 downe, Baltimore County, 14O feet above tide. 



Feet. 

 . Drab clays, iron-bearing in the immediate vicinity .... 10 

 .Buff, white and richly iron-tinted sand and clay (the 

 sands at times indurated by iron) white " pipe clay " 

 and red ochre 30 



Total 40 



Cretaceous. 

 Arundel 

 Patuxent 



XIII. Section at Reynolds' Iron Mine, Piney Run, 1 mile south of Hanover, 

 Anne Arundel County, beginning 100 feet above tide. 



Feet. Inches. 

 Cretaceous. ("White and light brown sand and gravel with 



iron stone crusts 10 



Patapsco ...-JWhite and variegated argillaceous sand, clay 

 "'] and red paint clay, more or less indurated 



at base 10 



LFerruginous ledge more or less conglomeritic . . 3 



Arundel Dense drab laminated clay, at times lignitic 



and with occasional undeterminable fern 

 impressions. Nodules, flakes and ledges of 

 carbonate of iron in many courses (partly 

 determined by boring) 70 



Total 90 



