This is a Late Archaic point style that is part of the Laurentian series of points, as are all Brewerton styles. Here is William Ritchie's description from his New York typology:
http://collections.nysm.nysed.gov/pr...r_notched.html
Description from lithics-net:
Description from Maryland typology guide:
Left to right, Ma. And RI; large examples:
Other RI examples:
http://collections.nysm.nysed.gov/pr...r_notched.html
Description from lithics-net:
Description from Maryland typology guide:
Left to right, Ma. And RI; large examples:
Other RI examples: