DescriptionFairport Chalk limestone marker bed F-2 20171230.jpg
English: Fairport Chalk limestone marker bed F-2 This "limestone above the Fencepost" resembles the Fencepost limestone like a "little brother", and was locally quarried with the Fencepost , but is thinner and lies directly on a 2" bentonite seam (Fairport Chalk bentonite marker bed F-1).
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