Missing deposit

My geo's currently can not find one of my salt deposits. I've done a dozen searches and they fail to find it.

When I hit 62 a few days back I searched and found all of them. I went to build a salt mine, realized I had no granite and I cancelled the build resulting in the deposit going away. Since then Ive searched a dozen times and no matter the spec or type of the geo, they always fail to find it.

It acts as if I permanently deleted the deposit making me weary of ever letting a mine collapse. Fix please?