Description | Letter from Allen describing a volcanic eruption that took place at sea near St Michael's [São Miguel Island, Azores, Portugal] on 1 February 1811. Allen observed smoke rising from the ocean, followed by fire and black rocks. He also describes a flood that took place around the same time in the village of Furnas [São Miguel, Azores, Portugal], which moved the earth to reveal an old manufactory building that was at least two hundred years old at the time. Includes minor corrections in graphite and ink.
Subject: Geology |