There are salt deposits all along the south side of Lake Erie, Lake Ontario and even directly under the city of Detroit.
My company buys about 600 trucks a year of bagged rock salt from American Rock Salt in Mt Morris, NY (south of Rochester).
Syracuse was named for the “saltine warrior”. There are large deposits just on the south side of Syracuse, NY too.
“Syracuse was named for the “saltine warrior”.”
That’s an interesting tidbit! I used to live east of Syracuse in Fayetteville for a short while. Spent five years in Ithaca, too.