MAEYLAND GEOLOGICAL SURVEY. 



PIUNCE GEORGE'S COUNTY, PLATE I. 



Fig. 1. — VIEW aloinc; paiat lUiAxcii, showing the rocky channel ch.\racteristic of 



PIEDMONT streams. 



Fig. 2. — view of pati'xent rivei: at priest bridge, showing the low muddy vegetation- 

 covered HANKS characteristic of coastal plain streajis. 



