Oblique aerial view of the Takotna River valley. McGrath district, Kuskokwim region, Alaska. 1942.

Album caption: Oblique aerial view of the Takotna River valley and the bordering uplands. The flood plain of the meandering Takotna River (Qam) floors of the broad canyon cut through the uplands along the Nixon Fork fault. On the left side of the river, Takotna Mountain rises about 3.500 feet above sea level. It has a core of mafic and felsic igneous rocks of Tertiary age and is mantled with rubble. To the right of the river are rounded mountains and creek valleys underlain by folded sedimentary rocks - graywacke and shale - of Cretaceous age. The summits form a prominent upland surface that has been intensely dissected by streams. McGrath district, Kuskokwim region, Alaska. 1942. (Photo by U.S. Army Air Force) Published as figure [...]