Ƙirƙirar wani nau'i mai rikitarwa na wannan jumla Cromerian Complex a Turai an raba shi zuwa 3 glacial periods da 4 interglacial periods.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Cromerian Complex a Turai a halin yanzu an rarraba shi zuwa 3 glacial lokaci da 4 interglacial lokaci, wanda ya dace da matakan Isotope na Marine 13 zuwa 21. "