Mining, Minerals and More in the Western Ouachita Mountains

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Figure 13. Map showing location of fieldtrip stops.Day 1Stop 1 – Ouro Mining – Plant Fossil Locality – Bates, ArkansasCoal seams occur in various places in the Arkansas River Valley, ranging from two inches to sixfeet thick. Major coal beds occur in the McAlester Formation and the Savanna Formation (Fig.14). Coal production in Arkansas started in the late 1800’s mostly from underground mines. Inthe 1950’s surface mining began and became the dominant form of mining well into the 1970’s(Haley, 1978). The only coal mined in Arkansas at this time is from the Lower Hartshorne Coal inthe McAlester Formation. There are two active mines in Sebastian County. The major use ofthis coal is in steel-making.12
The Lower Hartshorne Coal was strip-mined at this locality from 2004-2006. Older workingswere encountered during the mining which hindered operations. This site has since beenreclaimed and sold to Ouro Mining to undertake an underground mining effort.Figure 14. Generalized stratigraphic column showing named coal beds.13
Page 3 and 4: STATE OF ARKANSASARKANSAS GEOLOGICA
Page 5 and 6: Table of ContentsGeologic Setting..
Page 7: Educational Workshop Series 06 -
Page 10 and 11: Figure 2. Digital ortho-photograph
Page 12 and 13: This workshop focuses on the Stanle
Page 14 and 15: Studies of paleocurrent, grain size
Page 16 and 17: LaurasiaFigure 9. Late Mississippia
Page 18 and 19: Varying stream patterns develop acc
Page 22 and 23: This area is rich in plant fossils.
Page 24 and 25: The active portion of the quarry is
Page 26 and 27: Figure 21. Load features on sandsto
Page 28 and 29: References:Clardy, B.F., and Bush,
Page 30 and 31: Sigillaria, an extinct coal-age tre

Mining, Minerals and More in the Western Ouachita Mountains

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