I 2020 blev der dog rejste debat om hvorvidt det i Danmark giver mening at tale om en egentlig kobberalder, der begyndte omkring 3800 – 3500 f.Kr.
Af ukendte årsager var brugen af kobber i Danmark dog kortvarig, og en mulig dansk kobberalder blev tilsyneladende afløst af yderligere 1500 års stenalder, før metalforarbejdning igen blev udbredt i den danske bronzealder (ca. 1800 f.Kr.).[1][2]
History & Archaeology Page II Citat: "...Whether ancient Turkey entered the Chalcolithic in 5000 BC or 5500 BC (or even 6000 BC) depends on whether the author is a native Turk or not. In Israel, the period lasted from 4500 till 3500, in Akkadia from 4000 to 3500, in central India (Balathal) from 2500 to 1500, and in Cyprus, the greatest of all Classical copper suppliers, it had to wait till coppersmiths from Asia Minor migrated there in about 3500 BC...copper mines in Arak, Hamadan, and Sialk, Mesopotamia's other sources for copper were at Tabriz, Diyurbakir, Kulteppe and Erzincan...mountain ranges involved are the Ak Dag Mountains to the north of Babylon and the Zagros foothills in Armenia..."
