Reconnaissance geologic map of the John Day formation in the southwestern part of the Blue Mountains and adjacent areas, north-central Oregon /

Bibliographic Details
Main Author:	Robinson, Paul T.
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Map
Language:	English
Published:	Reston, Va. : The Survey, 1975.
Series:	Miscellaneous investigations series (Geological Survey (U.S.)) ; Map I-872.
Subjects:	Geology > Oregon > Jefferson County > Maps. Geology > Oregon > Wheeler County > Maps. Geology > Oregon > Wasco County > Maps. Geology > Oregon > Crook County > Maps.

Description
Item Description:	"Contour interval 200 feet with supplementary contours at 100-foot intervals." Includes "Index to sources used in preparing present map," 3 col. cross sections, and location map. Cartographic material.
Physical Description:	1 map : color ; on sheet 87 x 112 cm., folded in envelope 30 x 24 cm.
Bibliography:	Includes bibliographical references.