Anne Arundel county . Fig. I.—VIEW OF the magothy FORMATION at cape sable (north ferry point), magothy Fig. 2.—VIEW showing the matawan formation overlying the magothy formation AT ROUND BAY, SEVERN RIVER. 5 Maryland Geological Survey 65 western part of the county in almost any of the numerous cuttings wherethe roads descend into the deep stream valleys of the region. Character of Materials The Patapsco is a formation of very variable lithologic character inboth vertical and horizontal directions. Sands grade into clays andvice versa with remarkable frequency. The great variability of
Anne Arundel county . Fig. I.—VIEW OF the magothy FORMATION at cape sable (north ferry point), magothy Fig. 2.—VIEW showing the matawan formation overlying the magothy formation AT ROUND BAY, SEVERN RIVER. 5 Maryland Geological Survey 65 western part of the county in almost any of the numerous cuttings wherethe roads descend into the deep stream valleys of the region. Character of Materials The Patapsco is a formation of very variable lithologic character inboth vertical and horizontal directions. Sands grade into clays andvice versa with remarkable frequency. The great variability of the forma-tion may be realized from the fact that a well digger reported to thewriter that he found at one house, after passing through a thin coveringof sand, about 40 feet of tough variegated clay, while at another housealmost directly across the road and at approximately the same level hepassed through 40 feet of sand without a trace of clay. Taken as a whole,however, the argillaceous materials largely predominate, and althoughcocoa-colored, dark-drab, or light-colored clays may be developed, thePata
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