John Catalani did a fantastic job presenting on his methods of documenting his field work in the Platteville.  His knowledge of all thing Mollusk is always impressive.  It seems the Ordovician was an interesting time with a very diverse assemblage of Nautiloids.   Also interesting was the correlation of the Plattville formation in the greater context of the Ordovician Period.  There was a lively discussion afterwards that carried deep into the evening!