Limestone, Chert, or Limestone? [2013225_fieldtrip]
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Beav-O-Rama Outcrop
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Limestone, Chert, or Limestone? [2013225_fieldtrip]
- 5. Zero Mountain Outcrop #1
- 8. Zero Mountain Outcrop #2
- 10. Hammer Time [HT]
- 13. Beav-O-Rama [BR]
- 14. Northern Section [NBR] • Interbedded Chert & Limestone • Tripolitic chert prominent in the form of one large bed
- 17. Middle Section [MBR] • Interbeded Limestone & Chert • Penecontemporaneous Chert & Tripolitic Chert
- 19. Southern Section [SBR] • Massive Limestone • Chert becomes less prominent • ~100 yds South of [MBR]
- 22. Southern Face • Inter-bedded things! • Interbedded Chert and Crinoid beds. • Crinoid beds exhibit upward thinning • Transgressions or Turbidity Flows?
- 24. Graded Crinoid Bed • Thins Upward • TOP= Fine-Grained Bryzoan Packstone • BOTTOM= Coarse Crinoidal Grainstone
- 25. What does it mean?• "The Boone Formation appears to be cyclic in some areas throughout most of its lower interval." • "They may represent turbidity flows in which shallower water sediment is periodically brought into the deeper water setting." • "These cycles may also be related to fluctuations in early Mississippian shoreline where the orientation changed frequently in areas." • Source: Proceedings Arkansas Academy of
- 28. Conglomerate?