Etna : a history of the mountain and of its eruptions . ELIE BE BEAUMONTS CLASSIFICATION. 115 According to M. Elie de Beaumont, Etna is anirregular crater of elevation. The original depositswere nearly horizontal, and lavas were poured throughfissures in these, and accumulated at first in layers;afterwards the whole mass was upheaved and a The upheaving force does not appear to haveacted at one point, hut along a line traversing the Yaldel Bove. The latter he refers to a subsidence of aportion of the mountain. He divides the rbcks of Etnainto six orders: 1. The lowest basis of t
Etna : a history of the mountain and of its eruptions . ELIE BE BEAUMONTS CLASSIFICATION. 115 According to M. Elie de Beaumont, Etna is anirregular crater of elevation. The original depositswere nearly horizontal, and lavas were poured throughfissures in these, and accumulated at first in layers;afterwards the whole mass was upheaved and a The upheaving force does not appear to haveacted at one point, hut along a line traversing the Yaldel Bove. The latter he refers to a subsidence of aportion of the mountain. He divides the rbcks of Etnainto six orders: 1. The lowest basis of the mountainwould appear to consist of granite, because masses ofthat rock have from time to time been ejected. and arenaceous rocks, of which the moun-tains surrounding Etna are composed, and which appearcapped with lava near Bronte and elsewhere. 3. Basalticrocks, which are met with near Motta S. Anastasia,Paterno, Licodia, and Aderno, and in the Isolede Ciclopi. 4. Boiled pebbles, which form a range ofslightly rising ground between the
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