UNITED STATES DEPARTMENT OF THE INTERIOR
IRVEY

GEOLOGICAL Sut

Location of measured section Flathead quartzite through Madison imestone along southwest slope of Shell Mountain, southeastward from head of
ough eatin rou Meruan fag ernol bry roa ney cata of son 9° ¥" 2S 10. Kono formayan oboe

of Limngston formation—extending along west 3

‘of West Boulder River valley from SW corner sec 26 (unsurveyed), T 3 S/R 11 E to NW comer ot

Sec 19,7 3S, R 12 £, excapt tne Colorado ale ‘ram base of sandstone used for contour horizon upward for 28 feet, wih was measured alone
3

‘west
Rize
R 10€:

ot Boulder River m Sév seo
lo 4500 futin sees Ld and 25,7 1 8.4.11 E and er 5000

FORMATION

SERIES

THICKNES:
IN FEET

ELTERTIARY | SYSTEM
Falcone

Livingston
formation
7000

[soar

Virgelle sandstone and
undivided younger strata
1430=

Virgelle sandstone
100"

1000

Upper Gretaceous

CRETACEOUS

Colorado
shale
3100"

sandstone member

Boulder River

a
s
Kootenas
formation
-| 220"
3] tommaten
3 oration
off ‘oo’
o| 8 1
o|S
< ‘Swift formation 80° 80
5 Rierdon
‘orgaton ”
= |_Is 0
Pa
2 i 8
3" Piper
3 formation
3 3a"
=
23] quadrant quartate 100

Livingston formation lower 900 feet in sees, 27 and 33,1 1% 12 E.

tin secs 17 and 18.7 19,R ALE and secs 16 and 21-7 1S,

‘Similar to underlying 2000 feet except that this unt has thin beds of conglomerate consisting
‘of chert pebbles and smaller arnounts of limestone, quartare. and voleantc rock

Tutt, tufaceous sandstone, and gray to reddishgray shale, all interbedded Quartz grains
Tore prominent ih tuvfaceous Sandstone than ih underying 2200 feet and shale Wot Ss 0d
mein tre underbing unt

Shale sedis aray. ray to yellowish. brown tlt, and gray tufaceous sandstone all inte
stone nodules, seemingly unfossiiferads, are common i

“Tuff, largely fine- to coarse grained, and tuffaceous sandstone. Thin zone of volcanic breccia
‘and conglomerate (Weed's agglomerate”) at dase thickens eastward from mapped area

Tutf_mostly fine-grained, brown and green, in ower 300 feet. Upper 600 feet, interbedded
fine: and coarse-grained tuff "Dark brown calcareous round concretions in two beds of
light-brown tuft at top

Sandstone, mostly ledge forming, and, thin beds, carbonaceous and bentonitic shale.
Unpermost 30 feet is waxy. probably Dentonitic, shale with quartz grains Sandstone
pebbles and thin layers of green’ hard, probably tuffaceous, shale in lower 25 feet

Sandstone, brown to gray. very fine: to medium rane and thn bas of carbonaceous and

Sandstone, largely, basal part concealed, alittle shale m upper 50 feet

Sandstone. ne forming, ray, calcareous, contains pbbles of gray chet and quart as
much 9¢ one fourth neh Si ° eo ema
concealed: Sandstone ledge 80 foot Below top

Sandstone, mostly fine: to medium-grained, moderately calcareous, crossbedded, forms
ledges snd ridges. weathers very ight gray in many outerops

Largely concealed, shale and ripple-marked sandstone in outcrops Contains Ciescephites

Sandstone, yellowish-gray, mostly fine-grained, ripple-marked,thin-bedded, and a litle shale

Largely concealed, some thin beds of sandstone exposed

Shale, dar-gray sity. with afew ustywenthered concretions, a 2 oot ladgefocming sand

sie Seige gray, includes 3 or 4 beds of widely spaced 3-foot limestone concretions that contain /noceramus and

of amalruty weathered hard nodulagconeretons, most not over 4mehes mn damon
Ifower part ond sandy mn upper pare" Contains: Sshresarncsave WIEN Tec

BULLETIN 1021. PLATE 36

0 Feet

men ity

Shale, darkgray, and gray sifotone, calcareous concretions have abundant fragmenta of Incersmon, sandstone

in thin layers, hard dark-gray limestone concretions as much as 1 Toot in diameter near middle
Shale, darkgray, slighty sity: yellow cone-n-cone limestone concretions at base

Largely concealed: probably shale

Sandstone ray t brown. fine to corse gamed, thin bedded im lower 35 fet, more massve

upper

Sandstone, thn-bedded to massive, ledge forming: calcareous sandstone coneretons up to 8
feet across at top

‘Shale, largely concealed: thin beds of calcareous sandstone in shale; ledge-orming sandstone
‘that contains darkgray chert pebles near base

Concaled excet for 10fot bd af blue slcsous shale and sitstone (orellante) at to
‘2d basal 6fot Sandstone that has black chert pebbles in topmost in

Sanatone thm-beced, fre grained, sicous, weathers Bush gray, some shale; Loot
of bentonite 6 fest below

‘Shale, black, hard, fissile

Sanditne, most thm bedded, tme-grayped,siteous: black chert pebble conglomerate m
Trost 6 nehes, very thin layers of hard (siliceous?) shale im sandstone

Logeh, sey enemies, thin bedded fine-grained sandstone at top: a 1-foot bed of bentonite 20,

‘Sandstone, prominent ledge-forming, thick-bedded to massive
Contour horizon

Shale, darkgray, sandy, mae one td predomnanty sandstone. Sieous coneretons
‘contain an ammonite of Mowry age Waozestroo!re

ale, dark-gray, mostly sandy, gray coneretions in upper part and a 4-foot bentonite bed
near top

Shale, sandy, and 1. to 2:nch layers of bentonite; a 3-foot bed of bentonite at top

Shale, sity and sandy, gray, a 1-foot bed of bentonite at top
Shale, dark-gray, sity and sandy in upper one-third: a 6:nch bed of bentonite at top
Shale, darkgray, and thin stringers of sand and silt, a 10-nch bed of light-green bentonite at top
Shale, bentonte

Tightgray to white, crossbedded
Shale, darigray. with 2inch layers of bentonite in lower pat, upper pat concealed

Concealed, shale in upper part: a S-foot thick bed of gray calcareous sandstone at top con-
Tans some chert pebbles, poorly preserved wood fragments, Corbule and Ligue

‘Sandstone, thn bedded, sity, with abundant "worm ta
Shale, dark-gray: largely cover

Mostly concealed; redbeds and mudstones exposed locally

CChert-pebble conglomerate and sandstone.

Concealed

‘Sandstone, thin-bedded, partly crossbedded, gray and red

Most conceal beneath red sil Commonly three beds of sandstone exposed near mile
unit

Sandstone, glauconitic calcareous, crosshedded, fossilferous, makes prominent ledge

Concealed Digging shows some calcareous olive gray shale
Limestone, gray, colic
Concealed, some red soll

Limestone, gray, dense, and brownish: and yellowishgray shale
Lumestone, gray, thin-bedded, dense, fossiiferous

Shale, yellow, sity, and sandy

Shale, greenish-gray, sandstone and chert fragments at base

Quartate fine-grained, lightyellowsh-gray to light reddish-gray
Concealed
Most concealed, probably ed shale and sitsone

Limestone, thin bedded, red a
Shale and‘stttone yellow, fed shale sity beste

Limestone, ight gray, and a itle chert, unit somewhat brecciated
Limestone breccia, some red sity matenal in breccia

Limestone, light gray, finely crystalline, and chert lenses

Limestone ght ray to ht brown, sugary, party chert in upper pat, lower beds largely

Limestone, dolomite and siliceous Chert i lenses and nodules
Limestone, light gray, finely crystallin, massive, ledge-forming, weathers bluish gray, in part

u ight gray, finely crystalline, crinoxdal at top
Limestone, light gray, finely crystalline, in part crinoidal, few thin red to purple silty layers
throughout unt

Limestone, gray, Sandy, crinordal, and few layers of purple sity limestone
Limestone, sity, sandy, and shaly, part weathers yellow, algal () reefs in upper part

Limestone, gray and thin layers of argilaceous limestone, many layers of erinoidal limestone
“Thin stringers of gray very fine grained sandstone

Limestone, light to medium-gray, lower 75 feat thin bedded, upper 50 feet more massive
Mary beds of crinowal limestone
Limestone, gray, siliceous, and chert in 2anch layers

Dolomite, thin-bedded, orange-brown. underlain by argilaceous and sity beds that are mostly
concealed by yellowish brown soll

Limestone, brecciated, gray and greenish-gray, arglaceous

Limestone, thinbedded, gray, sugary
Limestone, ight olve-gray, finely crystalline and yellow to green silty limestone
Limestone, brownish-gray, 1n part silty and argillaceous, yellow weathered shale at base

Lmestone, brownish-gray, arglaceous

Limestone breccia, dark brownish-aray
Limestone, dark-brownish gray. finely cryst
Limestone, gray dolomite, and dolomite above 25 feet of dense thin-bedded blocky weather

Dolomite, it gray and ight yellowish ary, dang ofl rystaline, cltorming, per
‘Rote bang to calor and textural eierences

Lumestone, gray, conglomerate, and greenish-gray shale

Shale, greenish-gray, and few beds of glauconite gray limestone

Lmestone, ledge-forming “columnar
Shale, greenish-gray

* algal @)
Limestone, motted lightyellowish- and brownish-gray crystalline clif.forming, much 1s ooltc,
thin stringers of siltstone and sandstone common

Limestone gray dense only esting breciate, upper par sancy, weathers ight ive
To lgn oon and common concealed Beneath tlle

Limestone and shale, edgewseImestone conglomerate, npplemarked massive mestone,
‘and greenish-gray sh

Shale, each ary. and aay cstaline dauconte micaeousImestoe. “worm born"
bedding planet of limestones. some lat pebble mestone conglomerate

Limestone, gray thin-bedded, and greenish-gray shale Unit weathers yellowsh gray, forms.
Tedge

Limestone, crystalline, overlain by greenish-gray sh

‘Shale, greenish. and reddish-gray, and a few beds of glauconitc crystalline imestone

Sandstone and quartzite, gray to reddish gray. conglomeratic in basal few feet, unit missing
Tocally

o|* *
el7 5s
|e Ja vasson «| eons
jefe store s
\-|5 Boe
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o|2 =e
ol= 126
Ps
Three Forks shale 8” ©
<|- = om
718 me
°/? Jefferson
: itmestone ns
>|E 390" i
“ a7
o i—
i= 3s
= F - * ing de
Lisg Bighorn
Paes dolomite
853 200" ws
erg
ry |Grove Creek formation 50} [30
S| snowy Range 108
3 Tormanos
2 Te s
5 Plein 105
umesigne
z Te ——
= Park
A Sale
<|é 30
ele
= | Meagher limestone 65° FE=== 6
Wolsey =a
Shae ao
To
a
Flathead quartate 75°] \ 77) 7s
(4
13] Metamorphic
kg rock"
ze)
3

STRATIGRAPHIC COLUMN OF ROCKS EXPOSED NEAR LIVINGSTON, PARK

EXPLANATION

Sandstone

Conglomerate

‘Tutt or tufaceous sandstone and shale

Dolomite

Quartate

Concealed

COUNTY, MONTANA