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Mid State Quarry is located just southeast of Hot Springs in the northwestern portion of Hot Springs County. In this large quarry, the Mississippian Stanley Shale is mined for rip-rap and road metal. Since it is just outside the Magnet Cove intrusive, many alkalic igneous dikes (lampyrophyres) in various attitudes are exposed.
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 Click on picture for larger view. Bill indicates horizontal lamprophyre dike cutting Stanley Shale (Mississippian) in West Wall of Quarry.
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 Click on picture for larger view. Bryan examines lamprophyre dike in Stanley Shale, West Wall, Upper Level. Could this be jacupirangite?
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 Click on picture for larger view. Closeup of lamprophyre dike. |
 Click on picture for larger view. Jacupirangite? |
 Click on picture for larger view. Structural conundrum. Would someone please remove that dirt on the pit wall so I can see the contact? |
 Click on picture for larger view. More Stanley Shale. |
 Click on picture for larger view. Barry and the Distinguished Arkansas Geologist find a dike in the South Wall, Upper Quarry. |
 Click on picture for larger view. Another view of a dike in the South Wall, Upper Quarry. |
 Click on picture for larger view. More Stanley Shale.
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