The Minoan eruption of Thera occurred during a mature phase of the LM IA period. Efforts to establish the volcanic eruption's date have been controversial. Radiocarbon dating has indicated a date in the late 17th century BC; this conflicts with estimates by archaeologists, who synchronize the eruption with conventional Egyptian chronology for a date of 1525–1500 BC. Tree-ring dating using the patterns of carbon-14 captured in the tree rings from Gordion and bristlecone pines in North America indicate an eruption date around 1560 BC.