. Elementi di geologia, o gli antichi cambiamenti della terra e i suoi abitanti come illustrato da monumenti geologici. La geologia. GGQ dicchi di lata. [Ch. XXXI. Era, ad un certo grado, consolidato, potrebbe essere stato aperto in affitto, in modo che la lava salito attraverso fessure, le cui pareti sono state per- fectly anche e paralleli. Dopo la questione del fuso che ha riempito il canone di locazione (fig. VI6) aveva raffreddato, esso deve essere stato fratturato e spostata orizzontalmente da un movimento laterale. Nella seconda figura (fig. 717) la lava ha più l'aspetto della Fig. 71G. Fig. 717. -0 * 0 c 0 D *". Pianta della diga

• Collaboratore: Paul Fearn / Alamy Foto Stock
• ID dell’immagine: RCHNKJ
• Dimensioni dei file: 7,1 MB (191,9 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 1195 x 2091 px | 20,2 x 35,4 cm | 8 x 13,9 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments. Geology. GGQ DIKES OF LATA. [Ch. XXXI. was, to a certain degree, consolidated, it may have been rent open, so that the lava ascended through fissures, the walls of which were per- fectly even and parallel. After the melted matter that filled the rent (fig. VI6) had cooled down, it must have been fractured and shifted horizontally by a lateral movement. In the second figure (fig. 717) the lava has more the appearance of Fig. 71G. Fig. 717. -0 * 0 c 0 D *'. Ground-plan of dikes near Palagonia. a. Lava. &. Peperino, consisting of volcanic sand, mixed with fragments of lava and limestone. a vein which forced its way through the peperino. It is highly probable that similar appearances would be seen, if we could examine the floor of the sea in that part of the Mediterranean where the waves have recently washed away the new volcanic island; for when a super- incumbent mass of ejected fragments has been removed by denuda- tion, we may expect to see sections of dikes traversing tuff, or, in other words, sections of the channels of communication by which the subterranean lavas reached the surface. Volcanic Hocks of Olot in Catalonia.—Geologists are far from being able, as yet, to assign to each of the volcanic groups scattered over Europe a precise chronological place in the tertiary series; but I shall describe here, as probably referable in part to the Post-pliocene and in part to the Newer Pliocene period, a district of extinct volcanoes near Olot in the north of Spain, which is little known, and which I visited in the summer of 1830. The whole extent of •country occupied by volcanic products in Catalonia is not more than fifteen geographical miles from north to south, and about six from east to west. The vents of eruption range entirely within a narrow band running north and south; and the branches, which are represented as extending eastward in

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1860
• booksubjectgeology
• bookyear1868