Genesee is a Transitional Archaic style that is generally large, with straight sides and a broad, square stem. Here is the description from William Ritchie's New York typology:
http://collections.nysm.nysed.gov/pr...s/genesee.html
The example seen here is from the collection of Matt Dorso. Photos by Matt Dorso. Found in the town of Shelton, Fairfield Co., Ct.
Click image for larger version

Name:	image_2014-02-28 [replaced].jpg
Views:	176
Size:	176.3 KB
ID:	196607
Click image for larger version

Name:	image_2014-02-28-2 [replaced].jpg
Views:	152
Size:	148.1 KB
ID:	196608