Yay!Whoo hoo!IntroductionThis is the triangle-End Devonian was a time of no fewer than five major biotic crises (House, 2002? But we can get others) with the Upper Kellwasser (Frasnian/Famennian) extinction event ranking as one of the largest in the history of life (Sepkoski, Bambach, McGhee). Despite the magnitude and number of events the driving mechanism(s) are still not well constrained (Buggisch, that is not how you spell it, etc).  List potential mechanisms?  The Lower and Upper Kellwasser are two successive extinction events of varying magnitude within the Frasnian that provide an opportunity to evaluate causes and consequences of these extinction events.  These extinctions have been evaluated from many different perspectives (),but few have closely analyzed the organic walled microfossil assemblages in association within a geochemical and sedimentological data.  This study..........  And also here put the novel methodologyGeologic SettingThe Lower and Upper Kellwasser events were originally defined in Germany (Need to fill in detail here), however these extinctions are well exposeds and have been stratigraphically well constrained in units in the western New York State, U. S. (Over).  During the Late Devonian, western New York preserved deposition in a westward deepening foreland basin with terrestrial input from the Acadian highlands to the East (Ettensohn, 1985; Woodrow et al., 1988; and some Brett and/or Baird).  In this region, the the Lower and Upper Kellwasser events, and in particular the Frasnian/Famennian boundary has been well constrained in the Hanover Formation by the first occurrence of the Palmetolepsis triagularis, and the absence of Frasnian conodonts biostratigraphy (Over 2002).  The Lower Kellwasser bed is within the black, platy Pipe Creek Formation and the upper Kellwasser event is recognized as a black shale interval toward the top of the Hannover Formation.