Montana oil and mining journal. [volume] (Great Falls, Mont.) 1931-1953, 1937-10-02
COULMOORE


Continued from Page one)
gas. as an indication that the
area is petroliferous.
DR.. Coulter states that the struc-
ture is to be drilled Immediately
but the name of the operators has
not been revealed. The first we'll
is to be drilled on land belonging
to DR.. r.. B. Durnin and Virgil
Proctor Of the Great Falls Clinic.
The legal location Of a remark
able oil structure recently made by
Denver biologists, is in the north
ern sector of Lewis and Clark coun
ty, Montana; in townships II, is
and 10 North, Ranges 4 and 5 West.
1t lies about ten miles to Augusta
from the north closure, and 16
1t is about 90 minutes drive from
both Great Falls and Helena over
paved roads all the way, since
Highway No. 33 bisects the struc-
ture, having its locus directly upon
the anticlinal axis for a distance
of Is miles or more.
Finds No Faults
One can take the South Fork Sun
River road leading west and south
west from Augusta and continue
to drive completely around the per-
iphery of the outer structure for
a distance Of approximately 100
miles without observing a geologic
break or lapse in the continuous dip
of all strata directly away from the
central sector, at angles from 10
to as much as 40 degrees. There
are no faulted conditions anywhere,
except some slight determinations in
the extreme southern portion, but
which are sufficiently covered in
the Montana Group series with a
complete outer closure.
Surface Is Colorado
The geologic high, or central sec
tor surrounding the anticline, Is
found to be the top of the Colorado
shale, the whole of the Montana
Group from the Bearpaw, Judith,
Claggett and Eagle having been g
roded, leaving a perfect geologic
record in these same series in re-
verse sequence, when observed out
wardly from the central sector.
There is abundant archaeological
evidence in the fossiliZed forms for
proof of both age and
series. The ostre, mactra graciiis
and Faculties of the Bearpaw, the
sea weed and Ostra subtrigonalls
Cbrackish water SHIELD of the Ju-
dith. The False-bedded Claggett un-
deriving the characteristic concre-
tons of the lower Judith, which in
turn overhes the Eagle sandstone, |
which is the series directly above |
uhe Colorado shale-that unmistak-
able. thick, formation which must
be penetrated by drilling to reach |
the underlying Kootenai and the |
oil sands.
Is Perfect Structure
Tins we find here the complete
columnar sequence, VIII
,tructural conditions perhaps lit
lie more perfect than that main
aiming in the case of any oil flelo
If the west; Salt Creek, Elk bas-
IN. Lance, Big Muddy, Cut Bank !,
xevin or any of the others.
What appears most remar kaole
about this situation is the fact that
his big structure has lain unnotic-
n and undeveloped without a sin
lie test we'll for rs years since oil
vas first known to exist in CONNER
.ial quantity along the eastern
lank OF the Cordilleran Upfft.
Highway Down Anticline
A MAYED highway-No. 80, bisects
his field and thousands of veteran
III operators, biologists and techni-
.ians have driven directly over this
structure, along the axis of the an
is as prominent as
ed nose. Another anomaly Is pre-
ented in the fact that three wells
900, 5000 and 5000 feet in depth
we're all drilled outside of this pro-
geologic Vplift, where, as
1iewed from a. strictly scientific
.ngle-no oil could possibly have
zen expected to exist. The results
4 this drilling might have been
asily anticipated failure. aside
rom a little gas at several horizons:
nd even this gas may have been OF
Migratory origin from the nearby
tructure.
Covers $4,000 Acres
There are approximately $4,000
a III