Front:
OREGON GEOLOGY
WALLOWA LAKE
WALLOWA LAKE HAS BEEN FORMED BY
THE DAMMING ACTION OF GLACIAL DRIFT.
THE EASTERLY SHORE OF THE LAKE IS A
SPLENDID EXAMPLE OF A LATERAL MORAINE
AND THE NORTHERN BOUNDARY OF THE
LAKE OF A TERMINAL MORAINE. BEYOND
THE TERMINAL MORAINE AN OUTWASH
PLAIN EXTENDS BEYOND THE TOWN OF
JOSEPH. THE EAST AND WEST LATERAL
MORAINES RECORD TWO MAJOR STAGES
OF GLACIATION AND POSSIBLY SEVERAL
MINOR ADVANCES AND RETREATS DURING
EACH STAGE. THE LAKE HAS A DEPTH OF
283 FEET AND THE MAXIMUM HEIGHT OF
THE MORAINES IS 1200 FEET FROM LAKE
BOTTOM TO CREST. THE GLACIATION OC-
CURRED DURING THE LATE PLEISTOCENE
AGE APPROXIMATELY A MILLION YEARS
AGO AND EXTENDED DOWN TO ABOUT
THIS LEVEL.
HIGHWAY MARKER AT
WALLOWA LAKE
D
Back:
Aug. 13-16, 1957
Lake Elw - 4411 fl.
Pete's A (right) - 9600 £8.
13.
Kodak
L-
Paper --
