GIG 



VOLCANOS OP THE PHLEG3JEAN FIELDS. 



[Ch. XXIV. 



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sequent explosions, often leave some monuments of their 



former existence. We 



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ments of marine 



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in these strata, and I myself picked up three pieces of 



Fig. 6&. 



Section of Monte Nuovo showing the internal talus, a, a, on the inner slope of 



the crater on its north-east side. 



pottery. Such remains are just what we might have looked 

 for ; they are such as would have been showered down from 

 above on a spot where the gaseous explosions burst through 

 marine accumulations like those of the Starza, and by which 

 the houses of Tripergola were blown into the air. 



I shall again revert to the doctrine of the origin of vol- 

 canic cones by upheaval, when speaking of Vesuvius, Etna, 

 and Santorin, and shall now merely add, that, in 1538, the 



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whole coast, from Monte Nuovo to beyond Puzzuoli, was up- 

 raised to the height of many feet above the bed of the Medi- 

 terranean, and has since retained the greater part of the ele- 

 vation then acquired. The proofs of these remarkable 

 changes of level will be considered at length when the phe- 

 nomena of the temple of Serapis are described.* 



Folcanos of the Phlegrcean Fields. — Immediately adjoining 

 Monte Nuovo is the larger volcanic cone of Monte Barbaro 

 (2, fig. 63 p. 608), the ' G auras inanis ' of Juvenal — an ap- 

 pellation given to it probably from its deep circular crater, 

 which is about a mile in diameter. Large as is this cone, it 

 was probably produced by a single eruption ; and it does not, 

 perhaps, exceed in magnitude some of the largest of those 



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* See Chap. XXIX. 



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