11neral indust ri es ··ceology of t h e b … · reconnaissance geologic map of the butte falls...

TO ACCOMPANY BULLETIN No. 22 ··cEOLOGY OF T HE BUTTE FALLS

QUADRANCLE ..

Base by United Statts Fcrest Service Umpqua National Forest Map-1939

RECONNAISSANCE GEOLOGIC MAP OF THE

BUTTE FALLS QUADRANGLE OREGON

Datum mean sea level

1941

ISSUED BY THE STATE OF OREGON

DEPARTMENT OF GEOLOGY AND \.11NERAL INDUSTRI ES

EARL K N IXON, D IRECTOR

' \

T. 30 S.

T.3 1 5 .

>D

Tba I

Geology by W. D. Wilkinson. John Eliot Ail en , Wayne Lowell , Wallace Lowry, Murl H utchinson , Herbert Harper, R obert Littleton, Richard Mee<le, Stewart jones.

T. 32 S .

T.33 S.

T. 34 S.

T. 3 5 S.

"' "" ~ ... <> ... " ~ "' i:' " ~ !i;

&..

"' il ~

" ·~ -<: ., ~ ~ ~

PLATE I

EXPLANATI ON

~ Alluvium

(Stratified grau l , sand, riU and pumtu)

UNCONFORMITY

Int rusive (Diorite sill.s and ba!falt di kr.:r)

UNCONFORMITY

Later basalt flow (Liuht grav tntracan11on oHrine

bualt ftou:s)

UN CON FORM ITY

~ Basalt flows

(Light grar; Abbot BuUt: basalt /f01D8)

~ Basalt flows

(Gray Ol11nt Pr ak ba$all flows )

UNCONFORMITY (t)

[!_0] Rhyolite

( White lo buff rh11otif~ flows. tuffs u11d brrr:ctas)

B Older basalt flows

(Black . roarsr trrtured ba:~alls )

UNCONFORMITY (1)

Agglomerate (Gru n agglarnera.t~s . tu.ff!J and

flow breccia..s )

UNCONFORMITY (f)

~ Umpqua formation

(Buff &andstonto!l, shaln and conglamna tt'!l)

UNCONFORMITY

(lntruY-it~r massn, dikt's and r l! latnt. nx:k)

UNCONFORMITY

Dothan formation ( l-I ard sandJltont':J, shalu and

rnnglomnatt s )

UNCONFO RMITY (r)

I ;i I Galice formation

(Sli(JhLlJ 11Utat)Wrfhosed shale&, some san ston,s an conolomeratt.t )

UNCONFORMITY

0 Greenstones

(Sltghllu m ... tamor~houd basalts , oaP>brn.s and rt att>d rock.t}

UN('ONFORM ITY

May Creek formation (Mica .Jchi3t.s and slatol

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"' c z

"' "' ..... c :::> 0

>-"' c ;:: "' "' .....

u ;;; VI c "' :::> -.

z :!: z 0 > "' Q

U, "pthro111 ~- -0 Fault D, dotcmthrotO

~ Strike and dip of sedimentary beda

a1 .... Strike and dip of schiatoaity or foliation

.... Strike of schistoaity or foliation

.... Strike and dip·of joint planes

' Direction of dip of bed

~ X Mine Prospect