Cannot fathom these last 2 so need your help please.
12 down) In geology, a diapir structure formed by evaporite minerals such as halite(4,4) ?a??/?o?e
19across intersects with 12down's 4th/last letter of 12d's first word, too.
19a)Three dimensional figure such as a polyhedron when laid out flat(3) N??
Ta v much, Si