The productive and potential raw material sources of vanadium in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. This map is at the scale of 50 miles to the inch. The text accompanying the map briefly describes the major geologic types of deposits of vanadium, and it lists the productive and potential sources by the name of the deposit or geographic area and by coordinates to the nearest minute of latitude and longitude. Each productive or potential source is listed by state and a number, and its location on the map is identified by the same number. The text and the map were compiled from published and unpublished information; at least one reference is given for each locality if reports on it have been published.