GEOLOGICAL SURVEY

BULLETIN 1026 PLATE 3

z og
= n Q Or
w]e) e GAMMA RAY SELF-POTENTIAL RESISTIVITY NEUTRON wi
g FA 2 | Radiation intensity increases Millivolts Ohms m2/m Radiation intensity increases | §
p= = erie fair <9 SUEDE =
2 f=
Normal
= 5 oO 50
= £ ) 500
z oO
x E i) 5000
5 5 —————
3 2
. §
= 3 —e DEPTH,
fi E 104
< J Limestone, gray, mottled brown, argillaceous; calcareous red siltstone
ee e ae 23 and shale; angular chert; frosted quartz sand grains
e
e \ 20 Limestone, light- and brownish-gray, dense, vuggy, stylolitic, oil-stained
° A Limestone, light- to brownish-gray, dolomitic; small chert lenses; red shale
i. partings near top; calcite-filled fractures
28 Limestone, light-gray, dense, dolomitic; green shale and calcareous clay partings
y Parting
= 23 Limestone and dolomite breccia, reddish-gray; calcite cement
17 Limestone, light-gray, dense; oil in large vugs
¢ <= -—7—\ Limestone breccia, cherty, dolomitic, light-gray, light-brown and white
25
poset Limestone, light-gray, dense; chert nodules; vuggy zones
——
eee bn Limestone, medium- to light-gray, gray calcareous clay in stylolites; pinkish-gray
=== s zones; vuggy zones; lower 4 feet is dolomitic
———ae
: = Limestone, dolomitic limestone, and dolomite; gray, dense, stylolitic; pyrite
2100 52 gray, y
a 1 in vugs
s
.
.
.
Endlatiran iy 104 Limestone, gray; many vugs, 1 to 2 mm in diameter
.
oO
c
Zz 2
=< 3 Limestone, dolomitic limestone, and dolomite, white to light-gray; two thin vuggy
a £ 63 zones in limestone
a iE I r
ao = i
I
2 iB 2300 To T ss
== ——— ,
8 2 ~—_ Se Limestone, light-gray, thin-bedded; thin odiitic beds containing vugs; oolites are 1/4
= & Kyun Bo to 1 mm in diameter; fossil fragments
=
al BG Limestone, gray and purplish-gray, massive; vuggy
= 10] Odlitic limestone, gray; vuggy; odlites are 1/4 to 5 mm in diameter
Limestone, reddish-gray; upper 2 feet and lower 4 feet dolomitic
OBlitic limestone, light-gray, dense
: ae Limestone, gray, dolomitic, vuggy; disseminated pyrite crystals common
Odlitic limestone, pinkish- to light-gray, dense; fossils; vuggy zones
Limestone, gray, slightly dolomitic, vuggy; disseminated pyrite
20 Limestone, light brownish-gray, dolomitic
Limestone, light brownish-gray and gray, dolomitic; coarse angular chert;
45 medium to coarse angular quartz grains and pyrite are common
re Limestone, gray; a slightly dolomitic zone containing pyrite crystals
|____|-“TLimestone, gray; very fine to medium angular to subangular, polished and frosted
[10 I quartz grains are common
30 Limestone, gray and greenish-gray, slightly dolomitic; small vugs
20 Limestone, gray, arenaceous, dolomitic; very fine angular polished quartz grains; cherty
55 Limestone, gray, mottled, dolomitic; disseminated galena
v 25 Limestone, gray and brownish-gray, dolomitic; shaly
Eo
ecoD Limestone, gray, slightly to strongly dolomitic, arenaceous; fine to medium,
e222 50 subrounded to rounded, frosted quartz sand; gypsum (rare)
z Sos
=< See
— wEo 2800
z =o . r
S 2 5 oO 50 Limestone, gray and brownish-gray, massive, dolomitic; vuggy
SSS
Aa pare po
o2ec
ots
e2~ ae Limestone, gray, finely crystalline, argillaceous, slightly to moderately dolomitic;
re) 70 gray, ly cry! ightly
- ea upper and lower 10 feet contain fine subrounded frosted quartz grains
? 2900
55 Limestone, light-gray, dense, hard, strongly dolomitic; cuttings are fine and flaky
Limestone, gray, dense; grades from argillaceous at top to arenaceous, dolomitic
= 20 and dense with conchoidal fracture at bottom; fine, angular to subrounded,
=e polished quartz grains
3000447 + 771
T = 55 Limestone, light-gray, dolomitic; disseminated dolomite crystals
r
q oe
ze
————— Limestone, gray, mottled white and dark-gray, massive, hard, dolomitic; chert in
ara ee 60 nodules and small lenses; stylolitic; vugs with dolomite crystals
i
eas oreaae
= 31004 +4
zi/Sieé aa ae
See I Limestone, white to light-gray, dense, moderately dolomitic
S| 38|s ee oo
Sal sale — i WWW
I
rat S E oe iS a0) Limestone, white, dense, hard, moderately dolomitic
ia o |; 2 f+
O|e|® a
| a 3200 J T Limestone, light-gray, mottled, dolomitic; vugs 1 mm and less
I 40 8
So
I rt I I I
I Limestone, gray, finely crystalline, sugary texture, dolomitic; lower 10 feet is brown
T 30 gray, y
I I L ne I
—— a
— es
Shift ape. =
a= . % 110 Limestone, gray, finely crystalline, sugary texture; fossil fragments
Bs Limestone, gray, sandy texture
aa [10] Limestone, medium- to light-gray, finely crystalline, flaky; disseminated pyrite
y 3400 common; glauconite abundant; fragments of dark-green fissile calcareous shale
a| 5
c= alire Ss
a 8 ———
€ £ pa a 195 Limestone, gray, finely crystalline, sandy texture; abundant glauconite;
&|= — = S disseminated pyrite
5 | ad =
a] 8
S| 5 a
216 ———
3600
Shale, greenish-gray and dark-green, calcareous; fissile; disintegrates rapidly
a in water; transparent mica (muscovite?) flakes common; fossils; silt in upper
3700 235 PP.
20 feet
3800
80 Shale, dark-green, fissile, micaceous; disintegrates rapidly in water
r-4
=
&
oO Shale, dark-green, fissile, micaceous (biotite and muscovite); very fine to fine,
= angular to subrounded, polished quartz grains; interlaminated calcite lenses
= 80
S leas than 1 mm in thickness; fossil fragments; pyrite and calcite in small
5 concretions
cls
ef £
4 5 40004—+ 1,— T—|]
Ele e< = 60 Shale, dark-green, calcareous, fissile; fossils
ra) @ SM
2i\e
=z ®
xz >
=| 8
6
Shale, dark-gray and greenish-gray, fissile, micaceous, arenaceous; very fine
160 angular polished quartz grains; the lower 40 feet (cored) shows crumpling and
alinement of mica flakes; moderate metamorphism
4200.
Shale, dark-gray, fissile, crumpled, arenaceous; many lenses and stringers of
54 light-gray very fine angular polished quartz sand that is slightly calcareous
S 4300
Shale, dark-gray, fissile, crumpled, arenaceous, micareous; lenses and thin
146 stringers of calcareous sandstone; lenses of dolomitic limestone
Ss
pve Shale, dark-gray, fissile, micaceous, arenaceous
30
|__| “Shale as above and fragments of granite; 25 percent of sample consists of kaolinized
ie feldspar fragments, reddish-brown schist fragments, iron-oxide-stained angular
S — TaN TaN a ~~ oa quartz fragments, and fragments of fresh biotite
= DRS Sane a 2) NG Sample, 4440 to 4450 feet
i Total depth 4470 feet Granite, medium-grained biotite granite and fine-grained pink granite
=
&
a Samples examined were obtained from cuttings and as chips from a core:
Cuttings 2465 to 2985; 3100 to 4163; 4390 to 4440 feet
Core 1847 to 2465; 2985 to 3100; 4163 to 4390; 4450 to 4470 feet

LOG OF LOWER FORMATIONS IN THE INLAND EMPIRE REFINERIES WELL 52-34, CROW TRIBAL, SOAP CREEK DOME, MONTANA

EXPLANATION

Limestone

Es

Dolomitic limestone

OTS
[ToT
zoe ES

Odlitic limestone

Silty limestone

iin

Shaly limestone

l

I
‘a !
Sandy limestone

ES]
(ete

Breccia

a aD

Chert

igs

Calcareous shale

Sandy shale

RAR

Granite

e
Oil stain

.
Oil saturation

334328 O - 55 (In pocket) No. 2