Vosburg points are a a Late Archaic corner notched point assigned to the Laurentian Tradition series by New York State archaeologist William Ritchie. This series of points includes Otter Creek-Brewerton Side Notched-Brewerton Eared Notched-Brewerton Eared Triangle-Brewerton Corner Notched-Vosburg-Normanskill. The base can display 2 configurations. A shallow and broad corner notch, which produces a wide and expanding stem. This form can be confused with Brewerton Eared-Notched and can be distinguished by a longer stem in relation to the blade then Brewerton Eared-Notched Points, and the fact that technically Brewerton Eared-Notched are shallow side notched. The other displays a somewhat deeper corner notch with a broad expanding stem which however appears squat or short in relation to the blade. Here is the description with illustrations of both forms from Ritchie's New York typology:

See the first three figures here for examples of "squat" Vosburgs. The higher number figures here display the shallow and broad corner notching as do the the examples in the photograph below, from coastal New England.

The largest specimen, 2 1/2", is argillaceous slate, the remainder are quartzite:
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Argillite(argillaceous slate) Vosburg repurposed as a scraper:

Large Vosburg from eastern Ct. Photo and find by forum member flintmel: