. Book of the Royal blue . LLl-JHIEMhS FROM A GKoLoGICAI. IOIST OF VIEW :\ one may see, from the sand and clay andnumerous rounded boulders and pebbles,that the land has been submerged andcovered with a mantle of waterworn rockmaterial. Since this deposit was laid downthe land has been elevated to some extentbut even now the river valleys are drownedby the invasion of the sea. Leaving Washington and the low-lyingCoastal Plain with its tidewater and travel-ing one comes in a short distanceto the falls of the rotomae and enters a among which are Trenton, Philadelphia,Baltimore and Wash
. Book of the Royal blue . LLl-JHIEMhS FROM A GKoLoGICAI. IOIST OF VIEW :\ one may see, from the sand and clay andnumerous rounded boulders and pebbles,that the land has been submerged andcovered with a mantle of waterworn rockmaterial. Since this deposit was laid downthe land has been elevated to some extentbut even now the river valleys are drownedby the invasion of the sea. Leaving Washington and the low-lyingCoastal Plain with its tidewater and travel-ing one comes in a short distanceto the falls of the rotomae and enters a among which are Trenton, Philadelphia,Baltimore and Washington. Its westernboider is at the foot of the Point of Rocks a tunnel pierces a ridgewhich extends nearly to the river bank ata place where the stream makes a the Chesapeake & (Jhio Canal Howsipiietly along by the side of the Baltimore& (Ihio Railroad and at a considerableelevation above the river. The grade ofthe canal is, of course, very gradual andthe difference between the grade of the. A TVPKAI. MilCNTAlN lIDrsK IN TlIK SIIKNANPOAU VALLKl. different region of country known as thePiedmont Plateau. This is the name givento a belt of generally level country lyingalong the eastern base of the is broken by hills and the numerousstreams which cross it, have rapid currentsand well defined valleys affording a pleasingcontrast to the Coastal Plain. The easternborder of the region is marked by the fallline of the rivers and conse<|uently the headof navigation. Along this line have grownup the larger cities of the Atlantic seaboard, river and the canal is indicated by thelocks which are, in a sense, the counter-part of the rapids and falls of the Point of Rocks the distant mountainson the \irginia side of the Potomac may beseen. They are the eastern barrier of It is customary to think of a mountainrange as having a central crest, but are characterized by a valleyregion lying between two mountain b
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Keywords: ., bookauthorbaltimoreandohiorailr, bookcentury1800, bookdecade1890
