Minoan chronology culture was termed Helladic and Cycladic. In 1941 Arne Furumark applied the term Mycenaean to LH and LC. As it is clear that the Mycenaean Greeks dominated at Knossos at some point in Late Minoan (LM), the latter is often included under "Mycenaean" or called "Minoan-Mycenaean". The major study of Cretan pottery was Evans'. A very general stylistic trend was from dark decoration on a light background in the Early Minoan to white and red decorations on a dark wash or slip in Middle Minoan. Finally, there was a return to the earlier manner of dark on light in Late
Minoan eruption activity and the possible generation of tsunamis. Man-made structures not buried during Minoan A were completely destroyed. The third phase was also characterized by the initiation of caldera collapse. The fourth, and last, major phase (BO/Minoan D) was marked by varied activity: lithic-rich base surge deposits, lahars, debris flows, and co-ignimbrite ash-fall deposits. This phase was characterized by the completion of caldera collapse, which produced megatsunamis. Although the fracturing process is not yet known, the altitudinal statistical analysis indicates that the caldera had formed just before the eruption. The area of the island was smaller, and the southern and eastern