Need answer fast. 
The question is, do all types of salt come from the sea? As a bonus, does anyone have a list of all types of salt, both edible and non-edible?
-XT
You mean do they currently come from the sea? If so, the answer is definitely no - I live in a major salt-mining area.
no, not that i know of.
Originated in the sea, not mined. The dispute is I’m saying that not all salts originated in the sea, and my father in law, using Alton Brown as an authority, is saying that all salt comes ultimately from the sea (I believe he MEANS sodium salt, but he doesn’t believe there is any distinction). There is a good cigar on the line here…and my google-fu is weak tonight and I can’t get a definitive answer, so I figured this is the best place to ask.
-XT
While it is true that some salt deposits were laid down when ancient seas evaporated, all of the salt and other dissolved minerals in the ocean originally came from rock that was eroded away.
As for types of salt, a salt is chemically defined as an ionic compound that is the product of an acid-base reaction (for example, reacting hydrochloric acid and sodium hydroxide produces sodium chloride, with water also as a product, but water isn’t a salt because it isn’t ionic). Aside from sodium chloride, potassium chloride is commonly used as a sodium-free salt substitute. Many other salts can be eaten as well (e.g. calcium chloride, magnesium chloride, etc), although not all taste salty (this is why reduced sodium food still has some sodium in it, even then, some people don’t like the taste).
other threads
Gotcha.
“Sodium carbonate also erupts from Ol Doinyo Lengai, Tanzania’s unique volcano, and it is presumed erupted from other volcanoes in the past but, due to these minerals’ instability at the earth’s surface, are likely to be eroded.”