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Salleo Puntillo, M.
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- PublicationRestrictedChronicle of the 1865, NE flank eruption of Mt. Etna and geomorphologic survey of the Mts. Sartorius area(2011-06-30)
; ; ; ; ; ;Carveni, P.; Via Mario Vaccaro, 19 - 95125 Catania, Italy ;Mele, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Benfatto, S.; Via San Marco, 91, 95047 Paternò, CT, Italy ;Imposa, S.; Dipartimento di Scienze Geologiche, Università di Catania, Italy ;Salleo Puntillo, M.; Via San Marco, 91, 95047 Paternò, CT, Italy; ; ; ; The row of pyroclastic cones named Mts. Sartorius, outcropping on the NE flank of Etna, formed in 1865 during a lateral eruption that lasted about 6 months. The event was eye witnessed and described by numerous scientists and reporters. In this work, we use their observations to reconstruct the eruption chronology and scenario, and carry out a detailed geomorphologic survey to identify the eruptive features and pyroclastic deposits. The 1865 eruption began on 29 January along a segment of the main system of fractures oriented ENE–WSW, radial to the central conduit. After 30 January, a secondary system of fractures trending NNW–SSE was simultaneously active. The six larger Mts. Sartorius cones developed since 3 February along the lower extension of the radial system. They are markedly asymmetric due to the persistent winds blowing at the time and to the pre-existing topography formed on underlying deposits, previously unreported, that we have recognized. Now, about 150 years after the eruption, most of the eruptive vents and fractures are no longer observable in the field, being mostly hidden by products of subsequent phases of the eruption and by younger epiclastic deposits.287 25 - PublicationRestrictedLava trees and tree molds (“cannon stones”) of Mt. Etna(2011-02-10)
; ; ; ; ; ;Carveni, P.; Via Mario Vaccaro, 19, 95125 Catania, Italy ;Mele, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Benfatto, S.; Via San Marco, 91, 95047 Paternò, CT, Italy ;Imposa, S.; Dipartimento di Scienze Geologiche, Università di Catania, Italy ;Salleo Puntillo, M.; Via San Marco, 91, 95047 Paternò, CT, Italy; ; ; ; Unique volcanic structures, known in the literature as “lava trees” and “tree molds”, have formed at several sites on Mt. Etna volcano (northeastern Sicily, Italy). They form when a fluid lava flow runs over a tree, wraps around it and, while the wood burns off, solidifies forming a hollow cast of the tree. The inhabitants of the Etna area call these formations “pietre cannone” (“cannon stones”) because of their cylindrical shape. The first documentation of lava trees is from Hawaii, but the first eye-witnessed accounts of their formation are, to our knowledge, from Etna’s 1865 eruption. Although many of the literature examples of lava trees and tree molds formed in pahoehoe, many of those reported in this work formed in a’a. The sites where we have found the lava tree molds are located within the territory of the Etna Regional Park; most occur next to walking trails and have a high potential for geotourism.261 27