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a USGS U.S. DEPARTMENT OF THE INTERIOR
science for achanging world U.S. GEOLOGICAL SURVEY

PROFESSIONAL PAPER 1411-B
Geographic features—PLATE 1

Geldon, A.L., 2002, Hydrologic properties and ground-water flow systems of the Paleozoic rocks in the Upper
Colorado River Basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin

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CITIES, RIVERS, PHYSICAL FEATURES, NATIONAL PARKS, AND INDIAN RESERVATIONS

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TOPOGRAPHY

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BOUNDARY OF
UPPER COLORADO
RIVER BASIN

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INDEX MAP SHOWING LOCATION OF UPPER COLORADO RIVER BASIN
WITH RESPECT TO PHYSIOGRAPHIC PROVINCES

EXPLANATION
Topography

[] «Mountain ranges—Peak altitudes range from 10,000 to 14,000 feet above
NGVD of 1929

Isolated mountains—Peak altitudes range from 9,000 to 12,000 feet above
NGVD of 1929

High plateaus—Surface altitudes range from 8,000 to 12,000 feet above
NGVD of 1929

Broad, dissected plateaus—Surface altitudes range from 6,500 to 11,000 feet
above NGVD of 1929 on plateau rims and from 5,000 to 6,500 feet in
interior of plateaus. Plateau escarpments are ruggedly dissected and 1,000 to
4,000 feet high

Stair-stepped plateaus—incised by canyons and surmounted by buttes and
mesas. Surface altitudes generally between 4,000 and 8,000 feet above
NGVD of 1929

Irregular topography—Lowlands flanked by ridges, cuestas, and mesas that are
incised by deep canyons. Altitudes range from 4,500 to 9,500 feet above
NGVD of 1929

Rolling plains, hills, and low mountains—Surface altitudes generally 6,000 to
8,500 feet above NGVD of 1929. Hills and mountains rise 1,000 to 3,000
feet above plains

Plains, badlands, and mesas with isolated hills and mountains—Surface
altitudes range from 6,000 to 7,500 feet above NGVD of 1929 north of the
Uinta and Piceance Basins; from 4,000 to 7,000 feet above NGVD of 1929
south of the Uinta and Piceance Basins

Base from U.S. Geological Survey
U.S. base map, 1:2,500,000

GEOGRAPHIC FEATURES OF THE UPPER COLORADO RIVER BASIN AND VICINITY IN ARIZONA, COLORADO, NEW MEXICO, UTAH, AND WYOMING

By
Arthur L. Geldon
2002