DIGITAL GEOLOGIC QUADRANGLE MAP
WALDRON QUADRANGLE, ARKANSAS
DGM-AR-01019
GEOLOGIC MAP OF THE WALDRON QUADRANGLE, SCOTT COUNTY, ARKANSAS
Geology by Boyd R. Haley and Charles G. Stone
1994
Edited by William D. Hanson
Digital Compilation by Brandy R. Rakes
2007
Arkansas Geological Survey, Bekki White, State Geologist
Correlation of Map Units
12
12 Pennsylvanian PALEOZOIC
8
7
11
5 9 8
2
9
Description of Map Units
3 11
15 Savanna Formation (Pennsylvanian) - The Formation
14 4 consists of dark-gray shale and silty shale, with minor
15 15
amounts of light-gray siltstone and gray very fine to fine
sandstone, and coal beds. In this unit a few plant and
16 10 invertebrate fossils may be found. This unit is about 1600
feet thick and was deposited in a fluvial environment.
24 18
McAlister Formation (Pennsylvanian) - The Formation
20 consists of gray to black shale, tan to gray, thin-bedded
sandstone, with a few coal beds. Plant and invertebrate
fossils may be found from several horizons in the unit,
which is 500 to 2300 feet thick. The unit was deposited in
19 a fluvial environment.
37
Hartshorne Formation (Pennsylvanian) - The Formation
consists of brown to gray, massive, cross-bedded, medium-
grained sandstone, and some coal beds in the lower part of
40
the unit. Plant fossils occur in the unit but are not
abundant. This formation was deposited in a fluvial
environment and ranges in thickness from about 10 to 300
45
feet.
45 Atoka Formation upper (Pennsylvanian) - The Formation
consists of marine tan to gray silty sandstone and grayish-
black shale. Only in the Arkansas Valley and frontal
Ouachita Mountain provinces is this formation split into the
upper, middle, and lower members. The Atoka Formation
50 has a thickness of about 25,000 feet.
45
Atoka Formation middle (Pennsylvanian) - The
Formation consists of marine tan to gray silty sandstone
30
36 and grayish-black shale. Only in the Arkansas Valley and
frontal Ouachita Mountain provinces is this formation split
into the upper, middle, and lower members. The Atoka
40
Formation has a thickness of about 25,000 feet.
30
20
Symbols
10 43 6
14
17 Contact
Thrust Fault
Strike and Dip
Pit
20
Quarry
Reclaimed Pit
25 17
15
10
8
16
12
Mineral Commodities
8
Shale
Crushed Stone
26
16
10
18
5
8
References
24
16
7
Haley, B. R., and Stone, C. G., 1976, Geologic Worksheet
of the Waldron Quadrangle Arkansas: Arkansas
Geological Commission, Open-file report, scale
1:62,500.
10 11 8
7
Howard, J. M., 2007, Arkansas Mineral Commodity
Database, In-house data: Arkansas Geological
25 Survey.
15
20
McFarland, J. D., 2004, Stratigraphic Summary of
16
Arkansas: Arkansas Geological Commission
Information Circular 36, 39p.
25 40
Miser, H. D., and Purdue, A. H., 1929, Geology of the
20
43 DeQueen and Caddo Gap Quadrangles, Arkansas:
U.S. Geological Survey, Bulletin 808, 195p., scale
1:125,000.
DISCLAIMER
Although this map was compiled from digital data that was
successfully processed on a computer system using ESRI ArcGIS
9.2 software at the Arkansas Geological Survey (AGS), no
warranty, expressed or implied, is made by the AGS regarding the
unity of the data on any other system, nor shall the act of
distribution constitute any such warranty. The AGS does not
guarantee this map or digital data to be free of errors or liability for
interpretations from this map or digital data, or decisions based
thereof.
Funding by the United States Geological Survey in cooperation
The views and conclusions contained in this document are those of
with the Arkansas Geological Commission, under
the authors and should not be interpreted as necessarily
the COGEO Map Project representing the official policies, either expressed or implied, of
the Arkansas Geological Survey.
