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Prepared in cooperation with the U.S. Department of Energy under contract number DE-~C06-81RL10297
Walhlnlton Dlvlalon of GeolOlftl and Earth Reaourceo Open FUe Report 93-3
Sheet 3-Toppenish 15-mlnute quadran1le
GEOLOGIC MAPS OF PART OF
THE YAKIMA FOLD BELT,
NORTHEASTERN YAKIMA COUNTY,
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WASHINGTON
by Robert D. Bentley, Newell P. Campbell,
and John E. Powell
To
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1993
GEOLOGIC UNITS
Surflclal depoolts
Alluvium, mainstream facies
Alluvium, sidestream facies
Terr ace deposits, mainstream alluvial depo:s.its
Lower terrace deposits
Middle terrace deposits
Alluvial fan deposits
Landslide deposits
Eolian deposits
Catastrophic Hood :s.lackwater sediments
Older alluvial fan deposits
Ellen1bur9 Formation
Upper Ellensburg Formation, undivided
Conglomerate of Snipes Mountain
Rattlesnake Ridge Member
Selah Member
Columbia River Basalt Group
Saddle Mountains Ba-It
Elephant Mountain Member
Pomona Member
Umatilla Member
Wanapum &.Nit
Priest Rapids Member
Roza Member
Frenchman Springs Member
Sentinel Gap flows
Kelley Hollow flow
EXPLANATION
Contact-dashed where approximately located
Fauh- Dashed where approximately located; dotted where concealed; bar and ball on downthrown side
Fauh-Dashed where approximately located; dotted where concealed; bar and ball on downthrown side; (solid
where Quaternary units are a/fut)
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Thrust fauh-Doued where concealed; queried where uncertain; sawteeth on upper plate
Lineament from aerial photographs
--+-·---·
Anticline-Showing direction of plunge; dashed where approximately located; dotted where concealed
Syncline- Dashed where approximately located; dotted where concealed
Monocline-Arrows on side with greater Inclination
' / Strike and dip of inclined beds
... Geochemical sample locality