[Herbert C. Kraft et al. (1994)] The balance between sea-level rise and stream activity has been the key variable in the geomorphological history. Geomorphology The Dogan Point Site is one of at least 12 Middle to Late Holocene shell-matrix sites known on the banks of the Hudson River and situated on a till modified landform of Late Wisconsin age. The site is situated in two, rather than one, environments-the marine and the riverine, complicating our understanding of its geomorphology. The active geomorphic and sedimentary processes were inlet sedimentation, a variety of riverine processes, colluvial processes on the slope of the site, and exfoliation of the headland accelerated by wave activity and rising sea level. The bedrock is pyroxenite and diorite of Middle-Upper Ordovician age, covered by ice contact sands of Late Wisconsin age. Above that in some places can be found pockets of relatively larger less fragmented oyster shells of Figure 2. Cliffed headlands reconstruction for Dogan Point. (Modeled partially from Strahler, 1973) 27 The Bulletin Lithology of these (165) retained cortex while only 8 had bipolar damage. Fifty-nine percent of the flakes recovered from columns were caught in the 1/16-in screen. Heat spalling was rare. Flake tools were abundant in Brennan's excavation area and rare in the recent excavation. Flake tools were unifacial, bifacial, unilateral, and bilateral.