With submerged megalithic constructions now confirmed on the shallow seafloor off southwestern Japan, off northwestern and southeastern India, off Lebanon, Egypt, Greece, Malta, southern Spain, and Morocco, no doubt among others, and as these structures are often of a construction style of the cyclopean megalithic types which are often found nearby onshore, generally considered to be from circa 2500 B.C., does this not call into question the conventional time for the end of the Ice Age at circa 10000 B.C.?