Geology and uranium deposits of the Lucero uplift, Valencia, Bernalillo, and Sandoval counties Page: 19
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SECTION 5: 6 miles N.40W. of Canoncito---Section measured on
the south side of eastward projection of the rim;
top of section starts in Dakota sandstone in
the NW corner of SW ? Et Sec. l+, and continues
SSE into E NW SE Sec. 2+, T.I1N.,R.3W.
Cumulative
Feet Feet
CRETACEOUS
Dakota sandstone:
Sandstone; (typical, as described in
SECTION +).
UNCOr FORMITY
One of the few places where the angular un-
conformity, usually evident only on a
regional scale, is observable.
JURASSIC: Incomplete, 280 feet thick,
Morrison formation: Incomplete, 280 feet thick.
Westwater Canyon sandstone member:
6. Sandstone; white, bleached, medium
grained, subrounded, moderately
sorted, poorly cemented, very low
angle, cross stratified.............. 32 280
Recapture Creek shale member:
Mudstone: pale green; gray near top.....151 2+8
.iSandstone: similar to unit 2............ 22 97
3. Mudstone: maroon and purple............. 5 75
2. Sandstone: tan, fine to medium grained,
angular to round, poorly sorted, poorly
cemented, low angle cross stratified;
with small scour zones containing
coarse grains; feldspar recognizable,
less than 1%..............:.............. 43 70
1. Mudstone: purple; with thin (6-12 inches
thick), gray dense, cryptocrystalline
limestone units about 2, 12, and 22
feet above the exposed "base" of the
mudstone unit, limestone unit at 22
foot level contains aragonite; with 2
foot thick white sandstone (similar to
unit 2) occurring from 6 to 8 feet
above the "base" of the mudstone; (base
not visib ye)............................ 27 27
Valley: (covered by alluvium).- 19 -
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Mirksy, Arthur & Chenoweth, William L. Geology and uranium deposits of the Lucero uplift, Valencia, Bernalillo, and Sandoval counties, report, October 27, 1952; (https://digital.library.unt.edu/ark:/67531/metadc1393202/m1/21/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.