. A regional geography of the world, with diagrams and entirely new maps . The Western Cordilleraof young folded mountains,plateaux, fault blockmountains, volcanoes, etc. sedimentary rocksPlains of Denudation Residual MountainsThe thick dotted line marks theSotkhern limit reached by fee sheet Seal e y ioo icco icno Mil ft Fig. 95.—The cluef structural divisions of North America. 3^4 NORTH AMERICA mountain ranges forming the eastern and westernbuttresses of the system can easily be found on a mapby the help of Fig. 96, which also indicates the troughbetween the main mass and the coastal rans;;e
. A regional geography of the world, with diagrams and entirely new maps . The Western Cordilleraof young folded mountains,plateaux, fault blockmountains, volcanoes, etc. sedimentary rocksPlains of Denudation Residual MountainsThe thick dotted line marks theSotkhern limit reached by fee sheet Seal e y ioo icco icno Mil ft Fig. 95.—The cluef structural divisions of North America. 3^4 NORTH AMERICA mountain ranges forming the eastern and westernbuttresses of the system can easily be found on a mapby the help of Fig. 96, which also indicates the troughbetween the main mass and the coastal rans;;es. In. rIG. ijb.—Key to the huild of Western Noith America. the south this trough is represented by the Gulf ofCalifornia, and in tlic north by the sea passages betweenthe fringe of islands (the higher parts of the drownedcoastal range) and the mainland of British should also be noted very carefully that the plateau PHYSICAL FKy\TURES 365 is ^crossed by man) raiii^cs, vvIkjsc (iircctioii is generallynorth aiul south. The Eastern Ilighlaiuis and Coastal Plains.—Thiss)stcni of hij^hhmds extends for ahcnit 2,000 miles in anorth-cast to south-west direction, and may he dividedinto two, tlie Northern Appalachians and the SouthernAjjpalachians, by Hudson River. The northern portionis lower thnn the southern owinir to its havinc( under-i^onc subsidence; hence the separation of Newfoundlandfrom the mainland. The southern portion has a morevaried relief,as is shown by Fic^. 97, which brings outthe leadincj features of the Soutliern Appalachians,viz. the longitudinal Aj^palachian valle
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectgeography, bookyear19
