. An introduction to geology : intended to convey a practical knowledge of the science, and comprising the most important recent discoveries, with explanations of the facts and phenomena which serve to confirm or invalidate various geological theories. ations of a much larger crater,which has its escarpments turned towards the Puy de Pariou likethose of Mount Somma, which are turned towards Vesuvius. ThePuy de Pariou was, in all probability, a volcanic cone, formed withinthe larger crater by its last eruption of scoriae. The annexed cut, from a drawing I made near the foot of themountain, repr
. An introduction to geology : intended to convey a practical knowledge of the science, and comprising the most important recent discoveries, with explanations of the facts and phenomena which serve to confirm or invalidate various geological theories. ations of a much larger crater,which has its escarpments turned towards the Puy de Pariou likethose of Mount Somma, which are turned towards Vesuvius. ThePuy de Pariou was, in all probability, a volcanic cone, formed withinthe larger crater by its last eruption of scoriae. The annexed cut, from a drawing I made near the foot of themountain, represents the external shape of the Puy de Pariou, andthe dotted hues show the form and the relative depth of the crater,the bottom of which, a a, is about three hundred and twenty feet be-s^low the highest part of the rim c. The current of lava, h b, is onthe north-east side of the present mountain. The internal shape ofPariou approaches to quadrilateral, or is that of a cone compressedon each side, and somewhat elongated from north to south. Thebottom of the crater is nearly flat; there was a little water, from therecent melting of the snow, remaining in some of the hollows : in-deed we were told at Clermont that we should find the crater filled. 272 PUY DE PARIOU. with snow. It was early in May : but the snow was gone, and grasswas growing in some parts; others were covered whh loose massesof scoriae. Owing to the great porosity of the soil, the crater of Pa-riou seems doomed to perpetual sterility,—there is no tree or shrubwithin it; while that of Vesuvius, after a cessation of eruptions foronly four centuries, was covered with large chestnut trees.—Vol. 307. In the Puy de Pariou, and many other volcanic mountains of thisdistrict, there is nothing particularly remarkable, except, that the la-vas which have flowed from them at a remote period, should .pre-serve all the freshness of recent lavas, and that volcanoes so wellcharacterised, both by their forms and minera
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Keywords: ., bookcentury1800, bookidintroduc, booksubjectgeology, bookyear1833
