120105-1 Eurypterid Windrow from Phelps Waterlime, Fiddlers Green Formation, Passage Gulf, northeast of Cedarville, New York. Actually, this is only part of the windrow which I purchased on Ebay. It is likely that a Late Silurian storm collected eurypterid (molt) debris into this linear collection of remains preserved in fine-grained dolostone, i.e. waterlime. The most abundant debris consists of carapaces and parts of Eurypterus remipes. Also preserved is the dark patch of pterygotid integument with prominent scales in the lower part of the slab and a probable cephalopod.
LEFT: Part of the slab shown above, with details of the frontal appendages of Eurypterus remipes.
   Throughout the distribution of the Fiddlers Green, windrows appear to be common. In the eastern areas, Spohn Hill Sites like Passage Gulf and the Lang Quarry, for example, we may be in an area where the northern and eastern shorelines came together. Currents may have especially concen- trated debris in this area, near the shoreline. It is here that eurypterid remains are even found that have fallen into mudcracks - upon the next incur- sion of floating debris by waves or storms, the remains of eurypterids, especially the smaller fragments, fell between the cracks.
   This horizon is immediately overlain by the Forge Hollow Formation which, in the central part of New York (more basinal) consists of  a thick  evaporite deposit (gypsum). Was this episode transgressive or regressive.?  It is likely that waters remained shallow, and that in central New York gypsum was deposited during a regressive phase. Eurypterid horizons come back into the sequence with the overlying Williamsville Waterlime (and Oxbow) across the state - the
Eurypterus lacustris Fauna.
  
Eurypterid Gallery 6
The Eurypterid Gallery  -  Samuel J. Ciurca, Jr., Rochester, New York
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