Maryland Geological Survey 



77 



XIV. Section at " Timberneck Iron Mine " on Licking Run, 1 mile southwest 

 of Hanover, Howard County, 200 feet above tide. 



, Feet. 



Cretaceous. Reddish sand somewhat gravelly with corrugated iron 



Patapsco ...\ sandstone 12 



Variegated argillaceous sand and compact sandy clay 

 [ with clay pellets 20 



Arundel Drab lignitic and at times pyritous clay, very dense, 



and carrying pellets, nodules, flakes and ledges of 

 iron carbonate to bed of Licking Run 100 



Patuxent .... White clay, exposed in bed of Licking Run 5 



Total 137 



XY. Section at Baltimore and Ohio Raihoay cutting, between Jessup's and 

 Montevideo Stations, beginning 290 feet above tide. 



Pleistocene. Feet. 



Sunderland .Loam, gravelly loam and ferruginous conglomerate 



grading Into sand and gravel at the base 0-15 



Cretaceous. f Brownish drab clay with fragmental masses of hema- 



titic ochre carrying leaf and cone impressions... 2-6 

 Light colored clay, grading over into red and varie- 

 gated clay 6-)- 



Bog iron ore 1 



^Gravel 3 



{Lignitic clay, carrying iron carbonate and dinosaur- 

 ian bones 60 

 Light drab clay with " white ore " containing occa- 

 sional casts of mollusca 10 



.Generally loosely-bedded, white and vari-colored sand, 

 argillaceous gravelly and arkosic sand and sandy 

 clay, with much interbedded lignite to and below 

 level of railway tracks 60 



Patapsco 



Arundel 



Patuxent 



Total 161 



XVI. Section at " Old Blue Bank " iron mine, near Muirkirk, Prince George's 



County, 230 feet above tide. 



Feet. 



Recent Surface wash consisting of sandy gravel 4 



Cretaceous. 



Patapsco . . . Mottled gravelly loam with sllicified wood 12 



fMassive drab clay with septarian nodules of earthy 



Arundel . J siderite; bones of dinosauria near the base 20 



' ' I Highly lignitic lense with white charcoal ore 2 



iTough blue clay with white ore 15 



Patuxent . . . White sand, exposed by boring 10+ 



Total thickness 634- 



