D.F. Farrell John O. Helgesen Gerald F. Lindholm 1974 <p>The Crow River watershed, an area of about 2,760 square miles, is covered entirely by glacial deposits. A topographically high, east-west-trending end moraine divides most of the watershed into two drainage areas of approximately equal size. The North Fork Crow River drains a mixture of glacial outwash and till deposits, whereas the South Fork Crow River drains chiefly till deposits. Local relief is greatest in morainal areas and least in surficial outwash areas.</p> <p>Cambrian and Precambrian sedimentary rocks underlie the glacial drift in the eastern part of the watershed. Cretaceous sedimentary rocks, though discontinuous, are present in part of the western two-thirds of the watershed. Where sedimentary bedrock is absent, the glacial drift is directly underlain by Precambrian igneous or metamorphic rocks.</p> <p>Forested areas are sparse and occur mainly in steeply sloping morainal areas. Most land is used for agriculture, and slightly more than half the total population is rural.</p> application/pdf 10.3133/ha528 en U.S. Geological Survey Water resources of the Crow River watershed, south-central Minnesota reports