• WASHINGTON STATE DEPARTMENT OF
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Ban map prepared from U.S. Geological Survey 7.S·mlnute Granger NW (1965). Granger NE (1964), Granger (1965), and Sunnyside (1965) quadrangles; 1927 North American datum
10,000-foot grid bas«! on Washington coordinate system, south zone 1000-m«:er Unlvusal Transverse Mercator grid ticks, zone 10
Intent•!• and primary roads updated from Washington State Department of Tr11nsportat!on, 1991 (Granger NW, Granger, Sunnyside)
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Waahlntlton Dlvlalon of Geology and Earth ReoourcH Open FIi• Report 93-3
She•t 4-Gran .. r IS-111lnut• quadraft111•
GEOLOGIC MAPS OF PART OF
THE YAKIMA FOLD BELT,
NORTHEASTERN YAKIMA COUNTY, I
WASHINGTON
by Robert D, Bentley, Newell P. Campbell,
and John E. Powell
1993
GEOLOGIC UNITS
Svrflclal clepo,u,
Oam Alluvium, mainstream fades
a.,
Otm,
0,1
01,
a,
Alluvium, sidestream fades
Terrace deposits, mainstream alluvial deposits
Lower terrace deposits
Alluvial fan deposits
Landslide deposits
Eolian deposib
Ofs Catastrophic flood slackwater sediment&
Oa!o Older alluvial Ian deposits
Too
Tom
Tp
Tp,
T,
T,
Tee
Ellensburg Formation
Upper Ellensburg Formation, undivided
Conglomerate of Snipes Mountain
Rattlesnake Ridge Member
Columbia River Basalt Group
Saddle Mountains .... It
Elephant Mountain Member
Pomona Member
Umatilla Member
Wanapum Basalt
Priest Rapids Member
Roza Member
Frenchman Springs Member
EXPLANATION
Contact---dashed where approxlmately located
Thrust fault-Dotted where concealed; sawteeth on upper plate
--+-------!--Anticline-Showing direction of plunge; dotted where concealed
S!,,'.ncline-Showlng direction of plunge; dotted where concealed
Monocline-dotted where concealed; arrows on side1
with greater lncllnatlon
Strike and dip of inclined beds
... Geochemical sample locality
Mount St. Helens S ash
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