GEOLOGIC MAP OF THE GRAND VIEW-BRUNEAU AREA ...

IDAHO GEOLOGICAL SURVEY MOSCOW-BOISE-POCATELLO

TECHNICAL REPORT 98-1 JENKS, BONNICHSEN, AND GODCHAUX

G E O L O GIC M AP

G R AND V IE W -B R UNE AU A RE A, O WY HEE C O UN T Y, I DA HO

O F THE

D I G I TA LLY C O MPI LED V E RS IO N

Mar gar et D. Jenks, Bi l l Bonni chsen, and M ar tha M. G odcha ux 1998 11 6 1 5 43 00 Ti

116 00

7 30

QTsim

QTg

Qal

Qal

Ti

Tdix Ti

Qaf Qal

Qal

QTg

Qls

Qbf Qls

Ti

Qls

Qls

Ti

Ti QTge

Qds

Tcan

Qls

QTg Qal

QTgq

Qal

Qbf

Qaf

Tgsm

Ti

Qbf

Qbf

Qbf

Ti

Tgsm

Qls

Qal

Qls

Qaf

Tgsm

QTgq

Ti

Tgsm

Qal

Tcg

Ti

Tfly

Qal

Qbf

Qls

Qbf

Qds

Qds

QTg

QTgq Qls

QTg Qbf

QTg

Ti

Qls

Qls

Ti

Ti

Tcan

Ti

Ti

QTgq

QTgq

Qstr

Qbf

Ti

Qls

Ti

QTsim

Qbf QTsim

QTgq

QTge

Qbf

Qds Qfs

Tcan

Tdix

Qls Qrs

Qal

Qal

QTsim

Tcan

Qrs

QTcrf Qls

Qls

QTg

Qls Qal

Tcan

Qls

43 00

Qrs

QTsim

Ti

Qbf

Ti

Qbf

Qls

Ti

115 37 30

45

52 30

Qal

Tfly

Qal

Ti QTge

QTge

Qbf

Qal

Qds

QTgq

Tcg Qds

Tgsm

Qds

QTgq Ti

Tgsm

QTgq

QTg

QTgq Qbf

QTge

Qbf

Tkl

Ti

QTg

QTge

Tkl

SCALE 1:100,000

Qaf

Qds

Ti QTg

QTgq

Tgq

Qds

Qbf

Ti

QTg

Qal

QTgq

QTgq

Ti

52 30 Qds

QTg

Tgeb

QTg

QTgr Ti

QTg

MILES

115 30 42 52 30

Ti

Qds

QTg

Qfs

Tgeb

Qal

Qal

Qal

Qaf

Qds

Qds QTgq

Ti

Qds QTgqb

QTg

Tf

QTg

Tgq QTg Qds

QTg

QTg QTgr

QTg

QTg

Qds

Qds QTg

Ti

Qaf

Qal

Tpeb

QTg Tpeb

Ti

Qaf

Tbrc

QTg

Ti

Qal

Tpeb

Tpeb

Tgq

QTg

QTg

QTgrb

Tgr

Qds

Ti QTg

QTg QTg

Tev

Qds

QTg Tgq

Qaf

Ti

QTgr

Ti

QTg

Ti

Qds Qds

QTgr

Qaf

QTg

Ti QTg

Qds

QTgq QTgqb

QTg

QTg

QTg

Qds

QTgqb

Tgq

QTgq

Qaf

QTg

QTgr

Tgeb

Tgr

Qal

Qds

QTg

QTg

QTg

Tge

Tgq

Ti

Qds

Qds

Qfs

Tgq

Qaf

Qaf

QTg

Qds

Tgq

Qaf

QTgq

Qds Tsoo

QTgq

QTg

Ti Qds

QTgq QTgq

Qal

QTgr

QTgq

Tru Ti

Tev

Thb

QTgr

QTg Qaf

Tgr

Tgr

Qds

QTgr

Tgr Ti

Tru

QTgrb

Qds

Thg Tpc

Thb

Tpc

45

QTgr Tsfc

Thg Twt

Qaf

Ti QTgr

QTgr

Qaf

Tbtc

Tru

QTgr Tru

Ti

QTgr

Tdea

Ti Tpc

Tmbr

Tru

Tru

Tdea Thb Thb

Tgr

Qds

Ti QTgrb

Tgr

QTg

QTgr

Ti

QTg Qil Tgq

Ti Trc

Qil

Qds

Twc

Tgq

Tgq Tgr

Tsc

QTgr

QTgr

Tsug

Tgq

QTg

Ti Tgq

QTg

Tbru

Thc

Tmw

Tbrl

Tbwf Ti

Top Tpc

Ti Tbrm

Tsc

Ti Tmw

Trc

Qil

Tgq

Top

Qil

Twc Tmw

Tbwf

Ti

Twt

Tbru Tbrm

Qds

Qil

Tpc

Tgq

Thc

Thir Top

Twc

Tcro

Tgr

Tsc

Tpc Ti

Tbru

Ti

Tgr

Tgr

Thir

Ti

QTg Twc

Ti Tww

Tbru

QTg Thtc

Tpc

QTgq

Qds

Tbgr

Tww Tsc

Twt

QTg Thc

Tls

Tgq Tbrl

Ti

Tgq

Ti Tsc

Thtc

Tcro

Tbgr

Ti

Tgq

QTg

Ti Tsc

Top

Tru

Tgr

Twc

Qls

QTgq

Tbuc Tharu QTgq

Tlbbu

Twc

Qds

Thtc

Tru

Thb

Tpc

QTg

Tphb

Ti

Qal

QTg

Tsfc

Tcuf

Thc

Thc

45

QTg

Thc

Thc

Ti

Tpeb

Twc

QTgq

Thc

QTg

Ti Thb

Twfb

Tlbbl

Tharl

Thc

Ti

Twt

Thb

QTgq

Tind

QTgr

Tbrc

Tgq

Qds

Ti

QTgqb

QTgrb

Tpeb

Tgq

Tbuc Thc

Qds

Twt Twt

Qal

Ti

Thc

Tals

Tgr Tpc

Thc QTgq

QTg

QTg

Thg

Tharu Tind Thc Ti Thot

Thot

Tf

QTgrb

Ti Tgr

Tsot

Tgq

Tdea

Tdea Tgr

Tsot

QTg

QTgqb

Tru

Ti

Tpc

Tbuc

Tpeb

Tsog

Tind

Tgq

QTg Qds

Qds

Ti

Qds

Qds

QTg

Thc

Tbrc

Qal

Tsog

Thot

Ti Qds

QTgq

Tbla

Ti

QTg

QTgqb QTgq

Ti Ti

Tals

Ti

Qds

Tru

Thb

Ti Tev

QTgrb

Qds

Qds

QTg

Ti

Thb QTgr

Ti

Tev

Tf

QTgq

Ti

Tpeb

QTg

Qds

QTg

Tru

Qil

3

Tgq

Ti

Tsfc

2

Ti Qfs

Qaf

Qds

Qds

QTgq

Qal

QTgr

Qds

Ti

Ti

Ti

Qds

1

KILOMETERS

Ti

Qaf

Qaf

5

Qds

Ti

Qaf QTgq

Ti

4

Tgq

QTgq

QTgrb

QTgr

3

Contour interval 20 meters east of longitude 116, 50 meters west of longitude 116.

Qds

Qfs

Tf

2

Tgq

QTg

QTg Ti

1

0

1

QTg QTgq

0

Qds

QTgq

Qds

QTgr

1

Qds

QTgq

QTgq

QTg

Qds

Tgq

Ti

QTgr

QTg

Qds

Tgsm QTg

Ti

QTg

Ti

QTg

Qbf

Tsoo

Qal

Tgsm QTgq

Qds

Ti

Qal

QTgq

QTg

Tkl Tgsm

Tkl

QTg

QTg

Qds

Ti

QTgq

Ti

Tsc Tts

Tpc

Tol

Tgq

Tbwf Top

Tts

Tgr

Tol Tts

42 37 30 116 15

Twhc

11 6 0 0

7 30

42 37 30 115 30

Tsc Tbr

Ti

Base map from USGS digital raster graphic.

Tgq

Tmw Ti

Tsc

1927 North American Datum (NAD 27). Projection and 10,000-meter grid: Universal Transverse Mercator, zone 11. 25,000-foot ticks: Idaho coordinate system west and central zones.

QTg

Ttwi

Digital data capture by Alan K. Schlerf, Vance T. MacKubbin, Steve Mulberry, Jane S. Freed, Tim Funderberg, and Susan Wyman.

Twc

Tab Tsc

Troc

Compilation and layout by Loudon R. Stanford and Jane S. Freed.

Tbr Troc

Field work funded in part by the Idaho Department of Water Resources.

Tgq

Qil Tgq

Ttwi

Geology was digitized from nineteen 1:24,000-scale original maps (Technical Report 93-2) and then compiled for this publication at 1:100,000-scale.

AK SN

Tbr

E

RIV

MOUNTAIN HOME

ER

Tsal

The complete geologic map data are available, at original mapping scale, in GIS format.

Tgq

Qil

Tab

Tbr

Tab

Digital

IDAHO

Tab

and G I S

Tsc

Tsc Qil

Qal

Po t Bu Hole tte

Cr o G u w ba lch r

Br Wa oken g F la o n t

Ho l R o e In ck

Bi B a g Ho sin rse Ga p

ke La X

Mapping

Tsc

Q U A D R A N G L E L O CAT I O N

O

Idaho Geological Survey

Tbr Tbr

Pe B u n ce tte

u ea un Br

Br u D u ne a ne u s H Sp ot rin g

Li Va ttle lle y

Su Va gar lle y

J. Da Strik m e

C.

Gr Vie and w Ch Hi alk lls

P C a e rju e ny on

Vin Wa son sh

Tsc Tsc

Troc

Ttwi

Qil

Au B u s tin tte

Ta B u b le tte

MN

GN

Qil

Ttab Ti

Ttwi

INDEX TO 7.5-MINUTE QUADRANGLES

o

0 40.5

Tbib

16

o

Qil Qil Qil

UTM Grid and 1971 Magnetic North Declination at Center of Map

Qil Ttab Ti

Tsc

Qal

42 30 115 52 30

D ESC RI P T I ON OF MA P U N I T S SEDIMENTARY UNITS Younger Unconsolidated Sediments Qal

Intermittent lake sediments (Holocene)

Qfs

Fresh, unvegetated dune sand (Holocene)

Qaf Qds Qls Qbf

Ti Tf

Alluvium (Holocene)

Qil

Alluvial fan deposits (Holocene and Pleistocene)

Tls Thot Tsoo

Sand- to gravel-sized sediments, ferruginous and phosphatic cemented or stained (Miocene to Pliocene)

Landslide deposits (Holocene and Pleistocene) Bonneville Flood deposits (Pleistocene)

QTgq QTgqb

QTgr QTgrb

QTge

Tgq Tgr Tge Tgeb

Tphb Tbrc Tpeb

Reefal limestone of Hot Spring (Miocene to Pliocene) Tlbbu

Oolite of Shoofly Creek (Miocene to Pliocene) Tlbbl

*Where units Tgq, Tgr, Tge, Tgeb, Tf, Tls, Thot, and Tsoo occur as thin lenses or beds within the Ti unit, they are deleted from the map; however, they are shown where they occur as larger areas. Units Tgqb, Tsi, and Tbs, which are described in Technical Report 93-2 (see citation under Reference), occur only as thin lenses or beds within Ti and have been omitted from this map.

Vegetated dune sand (Holocene and Pleistocene)

Twc

Limestone, undifferentiated (Miocene to Pliocene)

Gravel Surfaces and Lenses QTg

South Area Units

Idaho Group Sediments Clay- to sand-sized sediments (Miocene to Pliocene)*

Twfb

Gravel surface, abundant Eocene volcanics (Quaternary or Tertiary) Gravel lens or surface, abundant quartzite (Tertiary) Gravel lens or surface, abundant rhyolite (Tertiary) Gravel lens or surface, abundant Eocene volcanics (Tertiary) Gravel lens or surface, abundant Eocene volcanics, significant basalt (Tertiary)

Qstr QTsim QTcrf

Basalt of Strike Dam Road (Pleistocene)

Upper basalt of Lower Black Butte Crossing (Pliocene?)

Tbgr

Lower basalt of Lower Black Butte Crossing (Pliocene?)

Tsot

Basalt of South Top (Pliocene)

Pillow basalt of West Fork Browns Creek (Pliocene)

Thtc

Basalt of Horse Trap Corral (Pliocene)

Basalt of Hot Creek (Pliocene)

Tmbr

Basalt of Missile Base Road (Pliocene)

Thc

Basalt of Indian Bathtub (Pliocene)

Tbla

Basalt of Black Rocks (Pliocene)

Tdea

Basalt of Deadman Gulch (Pliocene)

Basalt of Buckaroo Dam (Pliocene)

Tharu

Upper basalt of Harris Dam (Pliocene)

Tals

Basalt of Al Sadie Ranch (Pliocene)

Lower basalt of Harris Dam (Pliocene)

Thir

Basalt of Hole In Rock (Pliocene)

Tharl Tcro

Basalt of Simco Road (Pliocene or Pleistocene)

Tbru

Basalt of Crane Falls (Pliocene or Pleistocene)

Tbrm

Tfly

Basalt of Flying H Ranch (Pliocene)

Tbr

Basalt of Canyon Creek (Pliocene)

Tmw

Tcan Tgsm

Basalt of Goldsmith Road (Pliocene)

Troc

Basalt of Katie Lane (Pliocene)

Tbib

Basalt of Dixie Road (Pliocene)

Ttwi

Tdix

Basalt of Blackstone Grasmere Road (Pliocene)

Basalt of Windy Well (Pliocene)

Tbrl

Tkl

Basalt of Broken Wagon Flat (Pliocene)

Tww

Basalt of Chalk Gulch (Pliocene)

Tcg

Basalt of Pence Butte (Pliocene)

Tbwf

Basalt of Curlew Flat (Pliocene)

Tbuc

Gravel surface, abundant rhyolite, significant basalt (Quaternary or Tertiary)

Ttab

Tcuf

Basalt Volcanoes and Lava Flows

Basalt of Rattlesnake Springs (Pleistocene)

Basalt of Browns Creek (Pliocene)

Basalt of Table Butte (Pliocene)

Tuff of the Pot Hole Butte volcanic complex (Pliocene)

Tsug

Gravel surface, abundant quartzite (Quaternary or Tertiary)

Qrs

Tab

Basalt of Austin Butte (Pliocene)

Basalt of Seventy One Gulch (Pliocene)

VOLCANIC UNITS

Gravel surface, abundant rhyolite (Quaternary or Tertiary)

Basalt of Salvador Lake (Pliocene)

Tsog

Gravel surface, lithology undivided (Quaternary or Tertiary)

North Area Units

Tsal

Basalt of Winter Camp Butte (Pliocene)

Basalt of Sugar Creek (Pliocene)

Tind

Gravel surface, abundant quartzite, significant basalt (Quaternary or Tertiary)

42 30 115 37 30

45

Basalt of Crowbar Gulch (Pliocene)

Twhc

Basalt of Wickahoney Creek (Pliocene)

Upper basalt of Bruneau River (Pliocene)

Twt

Basalt of Whickney Tree Reservoir (Pliocene)

Middle basalt of Bruneau River (Pliocene)

Tol

Basalt of O X Lake (Pliocene)

Tru

Rhyolite, undifferentiated (Miocene)

Thb

Rhyolite of Horse Basin (Miocene)

Basalt of Rock Lake (Pliocene)

Tsfc

Rhyolite of Shoofly Creek (Miocene)

Basalt of Big Bend (Pliocene)

Tsc

Rhyolite of Sheep Creek (Miocene)

Basalt of Twin Butte (Pliocene)

Tpc

Rhyolite of Perjue Canyon (Miocene)

Basalt of Miller Water (Pliocene)

Published and sold by the Idaho Geological Survey University of Idaho, Moscow, Idaho 83844-3014

Rhyolite of Halfway Gulch (Miocene)

Tbtc

Rhyolite of Between The Creeks (Miocene)

Tts

Rhyolite of Tigert Spring (Miocene)

Top

Rhyolite of O X Prong (Miocene)

Trc

Rhyolite of Rattlesnake Creek (Miocene)

Older Volcanic Units Tev

Eocene volcanics

SYMB OLS Contacts: Dashed where approximately located; small dash where uncertain. Faults: Dashed where approximately located; small dash where uncertain; dotted where concealed; bar and ball on downthrown side. Crater or vent area of a basaltic shield or hydroclastic volcano.

Rhyolite Lava Flows

Lower basalt of Bruneau River (Pliocene) Basalt of Bruneau River (Pliocene)

Thg

REFERENCE Jenks, M.D., Bill Bonnichsen, and M.M. Godchaux, 1993, Geologic maps of the Grand View-Bruneau area, Owyhee County, Idaho: Idaho Geological Survey Technical Report 93-2, 21 p., 19 maps, scale 1:24,000. See map names in INDEX TO 7.5-MINUTE QUADRANGLES above.