Monday, March 27, 2023

08 Penn McAlester SS Arkola-APAC

 

  • Photo

  • Lidar Scan

  • ERA: Paleozoic
  • Period: Pennsylvanian (wiki, alpha)
  • Epoch: Middle (Desmoinian)
  • Formation: McAlester
  • Age: 308-306 million years ago
  • Lithology: Sandstone
  • Original location: 35.473880,-94.272593 (map)
  • Donor organization: APAC, Arkola Preston Quarry
  • Donor contact: Travis Michael
  • Financial support:
    • Mac and Karen McGilvery
    • Chris and Lesa Moyer
  • MacNote: Sample selected to illustrate a 'typical' sandstone from the upper Arkoma Basin fill. Crinkle laminations formed by coalification of macerated plant material. This indicates an adjacent vegetated area being reworked by high energy waves and currents to produce sand sized particles of plant debris commonly called 'coffee grounds' in the modern. This lithofacies is common in marginal marine sand flats.
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