GEOLOGY: N. M. FENNEMAN 
21 
Atlantic Plain. — 
2. Continental Shelf 
3. Coastal Plain: (a) Embayed section; (b) Sea Island section; (c) 
Floridian section; (d) East Gulf Coastal Plain; (e) Mississippi 
Alluvial Plain; (f) West Gulf Coastal Plain. 
Appalachian Highlands. — 
4. Piedmont province; (a) Piedmont Upland; (b) Triassic Lowland. 
5. Blue Ridge province: (a) Northern section; (b) Southern section. 
6. Appalachian Valley province: (a) Tennessee section; (b) Middle sec- 
tion; (c) Hudson section. 
7. St. Lawrence Valley: (a) Champlain Valley; (b) Northern section. 
8. Appalachian Plateaus: (a) Mohawk section; (b) Catskill section; 
(c) Allegheny Plateau (glaciated); (d) Allegheny Plateau (Cone- 
maugh section); (e) Kanawha section;* (f) Cumberland section. 
9. New England province: (a) New England Upland; (b) White Moun- 
tain section; (c) Green Mountain section; (d) Taconic section. 
10. Adirondack province. 
Interior Plains, — 
n. Interior Low Plateau :t (a) Highland Rim Plateau; (b) Lexington 
Plain; (c) Nashville Basin; (d) not named. 
12. Central Lowland: (a) Eastern Lake section; (b) Western Lake sec- 
tion; (c) Wisconsin Driftless section; (d) Till Plains; (e) Dissected 
Till Plains; (f) Osage Plains. 
13. Great Plains: (a) Missouri Plateau (glaciated) ; (b) Missouri Plateau 
(unglaciated) ; (c) Black Hills; (d) High Plains; (e) Plains Bor- 
der; (f) Colorado Piedmont; (g) Raton section; (h) Pecos Val- 
ley; (i) Edwards Plateau; (k) Texas Hill section. 
Interior Highlands. — % 
14. Ozark province: (a) Salem-Springfield plateaus; (b) Boston Moun- 
tains (plateau) ; 
15. Ouachita province; (a) Arkansas Valley section; (b) Ouachita Moun- 
tains. 
Rocky Mountain System. — 
16. Southern Rocky Mountains (to be divided into sections). 
17. Wyoming Basin. 
18. Northern Rocky Mountains (to be divided into sections). 
Intermontane Plateaus. — 
19. Columbia Plateau: (a) Walla Walla Plateau; (b) Blue Mountains; 
(c) Payette section; (d) Snake River Plain; (e) Harney section. 
* Likewise part of the Allegheny Plateau. 
t In the report of the committee this is called the Highland Rim Province. Messrs. 
Campbell and Matthes do not concur in the exclusion of this entire province from the Ap- 
palachian Highlands. They would divide it, and assign the eastern half to the Appalachians. 
X In the report of the committee this is called the Ozarkian Highlands. 
