A palace complex found on the site and dated to the Mycenaean era is believed to have been razed by fire in the late 15th or early 14th century BC, which destroyed several buildings but preserved Linear B tablets and seals constructed of unbaked clay.
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The fire dates tend to associate it with the thera volcanic eruption and the destruction of the Minoan civilization.
...is believed to have been razed by fire in the late 15th or early 14th century BC...IOW, they didn't do any scientific dating of the site. The Minoan civ was overthrown and replaced by Mycenaeans.