The outcrop displays to distinct units: the Austin Glen Formation which is Ordovician and consists of shales and siltstones that have been folded.  In the outcrop they are nearly vertical.  On top of them are the Silurian and Devonian carbonates of the Rondout and Manlius Formations.  They dip at more than 45 degrees toward the left if you are facing the outcrop (northwest).  The unconformity is along the contact between the two units which is not only an angular unconformity but also a disconformity (missing beds).  The rocks here were involved in three orogenic events during the Paleozoic - the Taconic, Acadian, and Alleghanian orogenies.