Figure 12-01. Mountainous Region

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108°W 106°W 104°W SEDGWICK Cache la Poudre River LOGAN South Platte River Little Snake River MOFFAT JACKSON LARIMER PHILLIPS Yampa River ROUTT WELD f MORGAN White River GRAND 40°N Blue River BOULDER YUMA 40°N RIO BLANCO WASHINGTON BROOMFIELD EXPLANATION GILPIN ADAMS High Plains DENVER Regional Aquifers Eagle River CLEAR CREEK Region Eagle River SUMMIT GARFIELD EAGLE ARAPAHOE e North Fork South PlatteJEFFERSON River Mountainous Region Outline Colorado River Roaring Fork River Arikaree River Mountainous Region DOUGLAS KIT CARSON Arkansas River Dominated by East Muddy Creek ELBERT PITKIN Precambrian Rocks MESA LAKE PARK Colorado Taylor River Area Where Colorado LINCOLN Plateaus Regional Aquifers Big Sandy Creek Plateaus DELTA d TELLER Extend Into Mountainous c EL PASO Region Region CHAFFEE CHEYENNE GUNNISON Colorado Neogene Volcanics South Arkansas River Piedmont Gunnison River FREMONT Uncompahgre River Paleogene Volcanics MONTROSE Region San Miguel River Arkansas River CROWLEY KIOWA OURAY PUEBLO CUSTER 38°N SAGUACHE SAN MIGUEL 38°N Mountainous Valley Key b BENT PROWERS HINSDALE OTERO Intermountain Valley Outline DOLORES SAN JUAN a a) San Luis Valley West Dolores River Rio Grande MINERAL HUERFANO b) Wet Moutain Valley- Dolores River Huerfano Park RIO GRANDE ALAMOSA c) Upper Arkansas Valley d) South Park MONTEZUMA Los Pinos River BACA Animas River LAS ANIMAS e) Blue River Valley LA PLATA COSTILLA Purgatoire River CONEJOS f) Middle and North Parks Piedra River San Juan RiverARCHULETA 108°W 106°W 104°W 0 20 40 60 80 100 Miles 0 20 40 60 80 100 Kilometers Figure 12-01. Mountainous region. Valley outlines from NHDH HUC8; geology from Tweto (1979). Colorado Geological Survey ON-010 Colorado Groundwater Atlas. .

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Dolores River Restoration Partnership: a Private/Public Collaboration Dolores River Restoration Partnership
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Figure 12B-01. Mountainous Volcanic Region
108°W 106°W F Ancestral ron t Rang LARIMER Uinta Sand Upl e ift Little Snake River Wash Ba North Platte River MOFFAT s Yampa River in JACKSON Park-Gore Range Axial ROUTT Ba s in Up li h ft rc as A ek e Dougl Cr White River GRAND 40°N Whi EXPLANATION RIO BLANCO 40°N te Ri Neogene Volcanics ver Upli Neogene Sediments ft Paleogene Volcanics Eagle River Blue River Paleocene-Cretaceous Intrusives Piceance Basin Roaring ForkCentral River Colorado TroughEAGLE Cretaceous Seaway Sediment GARFIELD Eagle River Sawatch Range Aquifers SUMMIT Mesozoic Sediment Aquifers Ancestral Rockies Basins Colorado River Precambrian Basement PITKIN Arkansas River East Muddy Creek Mountainous Region MESA LAKE PARK Unc Mountainous Valleys ompa ghre Up Colorado Plateaus Region lif DELTA t Laramide Basin Outlines Laramide Uplift Axis Uncompaghre Uplift G un Taylor River CHAFFEE nison Laramide Basin Axis GUNNISON Upl Ancestral Rockies Uplift Axis Uncompahgre River South Arkansas River ift Ancestral Rockies Basin Axis Paradox Basin FREMONT MONTROSE San Lui CUSTER s OURAY Up San Miguel River li ft 38°N SAN MIGUEL SAGUACHE 38°N Animas River HINSDALE DOLORES SAN JUAN Rio Grande MINERAL ag Dolores River n S West Dolores River ua J RIO GRANDE ALAMOSA e San MONTEZUMA n Dom Jua Archuleta Anticlinorium San Los Pinos River LA PLATA COSTILLA San Juan Piedra River Basin CONEJOS Tusas Uplift COSTILLA ARCHULETA COSTILLA 108°W 106°W 0 10 20 30 40 50 Miles Geology modified from Tweto (1979); structural features from Hemborg (1996). 0 10 20 30 40 50 Kilometers Figure 12b-01.
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