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