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AlluviumMainly <illuviil silt, sand, and gravel In floodplains and diy washes loosely consolidated withlocally Interbadded ccllche.
Sand and Gravel, undifferentiatedGravel in a silt and sand matrix poorly sortedmoderately Itratifiad. Gravel includes clasts ofvolcanic pr<nitic <Ind metamorphic rocks.
Colluvium
Qco
Mainly basalt and ondesitrc rubble onthe flanks of volcanic hips,
QTbf
Basin FilliUndffarenllated sand and silt 01 Ihe ground
surface,sut surface moderately to wen atrat-iIfad, In eluder Palo Verde cloy
—Tvfnhhih m//
Fan DepositsGravel ln o ~ ilt and clay matrix, poorly mrted,moderately stratified. Gravel includes ctasteprirnaruy of volcanic and metomorphio materialwith o minor amount of granitic debris.
Tertiary VolcanicsTvu —undifferentiated basalt and andcsne
TVtl-basalt dnd olivine basalt
Tvt —tui',includm auartx lotite,weldrddo<i<a, and tuffoccous sandstone.
ARIZONA
Flagstatf
Arkoslc conglomerate ond sandstone Not exposed 01flic surfaceiencounteredin explor~tory borings.
h I
pf gr;
SITE LOCATION
Phoenix
Tun~on
Grantic basement Includes fouoted and nonfoliotadigranfc rock Not exposed rrt thesurfuca,encovntemd
in exploratiiry borlnp».
Vole lnic FanglomeraleiVolcanc priivel-predominantly basaltir. In com-iiposton,ln 0 sut and matrix poorly sortedl
angular to subrounded, poorly strati fled<rarecleats of metamorphic material presentl materialsrange from moderately consolidated to very
densel'ementedwith couche.
EXPL ANATION
~OT b
Arlington Basaltsuphtly porphyritic blockouvine basalt flow.
0 2000 4000
FEET
Gila River Gravel,40foot Terrace level
Dike
ContactDashed where approximately located
Fault
Dashed where approximatt:ly located
Buried Fault
Inferred from geophysical surveys
~ py 2 Exploratory BoreholeI
~ Geologic Section
. photo Lineation
NORTH
Arizona Nuclear Power ProjectI'alo Verde Nuclear Genecatin~ Station
Units I, 2 & 3
GEQLOGZG h1AP OF SITE AREA
Figure 2 5-13
August 257 1975inPP-I 4 —288 4-4 4e
amendment 10
Seismic Line$1-2cBackhoe Trench LocalityStrike and Dip Flow Joints
~4e Strike and Dip of Flow Bedding