| LAURENTIAN UPLAND |
|
|
| Superior Upland (1) |
rolling to low mountainous |
Precambrian igneous and metaphorphic (edge of Canadian Shield) |
| ATLANTIC PLAIN |
|
|
| Continental Shelf (2) |
gently sloped ocean floor |
Late Cenozoic, with cover of late Ice Age deposits |
| Gulf and Atlantic Coastal Plain (3) |
rolling to flat |
Mesozoic and Cenozoic sedimentary strata, gently dipping toward coast |
| APPALACHIAN HIGHLANDS |
|
|
| Piedmont province (4) |
mountainous to rolling |
Paleozoic metamorphic to west; Mesozoic coastal plain to east |
| Blue Ridge province (5) |
mountainous |
Precambrian to Paleozoic granite and metamorphic |
| Valley and Ridge province (6) |
mountainous with long ridges and valleys |
folded Paleozoic sedimentary strata |
| St. Lawrence Valley (7) |
rolling to flat |
Precambrian bedrock covered by glacial and lake deposits |
| Appalachian Plateaus province (8) |
rolling |
horizontal to gently dipping Paleozoic strata |
| New England Province (9) |
rolling to low mountainous |
Precambrian and Paleozoic igneous and metamorphic |
| Adirondack province (10) |
low mountainous |
Precambrian igneous and metamorphic |
| INTERIOR PLAINS |
|
|
| Interior Low Plateaus (11) |
rolling to low mountainous |
Paleozoic metamorphic and sedimentary |
| Central Lowlands (12) |
rolling |
Paleozoic sedimentary strata, with surface glacial deposits |
| Great Plains province (13) |
rolling |
Paleozoic to Mesozoic strata, with surface glacial deposits |
| INTERIOR HIGHLANDS |
|
|
| Ozark Plateaus (14) |
rolling to low mountainous |
Precambrian to Paleozoic igneous and metamorphic, Paleozoic sedimentary |
| Ouachita province (15) |
rolling to mountainous |
folded Paleozoic sedimentary strata |
| ROCKY MOUNTAIN SYSTEM** |
|
|
| Rocky Mountains (16-19) |
mountainous |
Precambrian to Cenozoic wide variety, with faulting and folding |
| INTERMONTANE PLATEAUS |
|
|
| Columbia Plateau (20) |
rolling to stair-stepped |
Cenozoic volcanics |
| Colorado Plateau (21) |
rolling, stair-stepped, deeply encised |
Paleozoic to Cenozoic sedimentary, largely undeformed |
| Basin and Range province (22) |
mountainous; block faulted |
Precambrian to Paleozoic in horsts; Cenozoic in grabens |
| PACIFIC MOUNTAIN SYSTEM |
|
|
| Cascade Mountains (23) |
mountainous; volcanic |
Paleozoic to Cenozoic bedrock; Cenozoic volcanics |
| Pacific Border province (24) |
mountainous to rolling |
diverse Precambrian to Cenozoic variety; faulting, intrusions; terranes |
| Lower California (25) |
low mountainous |
Paleozoic to Cenozoic variety; faulting |
| ALASKA |
|
|
| Alaska Range (26) |
mountainous |
Precambrian metamorphic; Paleozoic to Mesozoic sedimentary; terranes |
| Brooks Range (27) |
mountainous |
Precambrian metamorphic; Paleozoic to Mesozoic sedimentary; terranes |
| Aleutian Range (and Islands) (28) |
mountainous; volcanic |
Cenozoic volcanics |
Lab 7: Geology of the United States
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