Wow... all in the same hole? That's awesome. Might be a banner find depending on what those other coins turn out to be. They seem to be a little smaller than the silver dollars, and not silver... maybe counterfeit half dollars? I'm only guessing that due to the look of that one Morgan. It seems to be counterfeit. Cleaning a counterfeit coin might be a little tricky if that's what they are. If they're made of pewter, which a lot of counterfeit coins are, they will probably flake... so be careful.