Minoan civilization Santorini, which was entombed in a layer of pumice. Although it is believed to have severely affected the Minoan culture of Crete, the extent of its effects has been debated. Early theories proposed that volcanic ash from Thera choked off plant life on the eastern half of Crete, starving the local population; however, more-thorough field examinations have determined that no more than of ash fell anywhere on Crete. Based on archaeological evidence, studies indicate that a massive tsunami generated by the Thera eruption devastated the coast of Crete and destroyed many Minoan settlements. Although the LM IIIA (late Minoan) period
Minoan civilization is characterized by affluence (wealthy tombs, burials and art) and ubiquitous Knossian ceramic styles, by LM IIIB Knossos' wealth and importance as a regional center apparently declined. Significant remains have been found above the late Minoan I-era Thera ash layer, implying that the Thera eruption did not cause the immediate collapse of Minoan civilization. The Minoans were a sea power, however, and the Thera eruption probably caused significant economic hardship. Whether this was enough to trigger a Minoan downfall is debated. Mycenaean Greece conquered the Minoans during the late Minoan II period, and Mycenaean weaponry has been found in burials