Question: What was a mountain building period that ended 440 million years ago, that durring this time a unit of interbedded greywackes and shales that outcrops in eastern New York State were deposited in a deep marine setting in a foreland basin during this time? 
Sentence (from "Austin Glen Member"): Graptolite fossils place it in the stratigraphic zones of "Nematograptus gracilis" and "Climacograptus bicornis", but its age could be Llandeilo or Trentonian (earliest to latest Darriwilian,  465 ).
Relevant evidence: No