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3. Of Lower Hills, 

 (De Montibus tertiariis.) 



Thefe are pofterior to the Monies fecundan^ 

 being fuperincumbent to them either in vallies or 

 on their flopings; partly produced by their 

 decays and accumulated fand and clay-beds. They 

 have likewife regular ftrata, and different petri- 

 factions ; but, in particular, Numtnularios and Len- 

 ticularios. They have alfo fuffered many devafla- 

 tions by volcanic eruptions ; and our finding ir>- 

 clofed in the lava large fragments of Hmeftone, 

 petrifactions, and other adventitious bodies, is en- 

 tirely owing to fuch violent eruptions from under 

 ground, fmce the fluid lava has furrounded and 

 taken up whatever body was in its way. Often 

 they have been covered with volcanic afhes. Some 

 of thefe Monies tertiarii are poftericr to the erup- 

 tions, and fuperincumbent on their productions. 

 If thefe contain any lumps of lava, pumice- 

 Itone, &c. they have been brought into them from 

 afar, and by water. In feveral places in the Vi- 

 centine, Veronefe, and other diftricts of the Ve- 

 netian dominions, they conaain coal-beds, arid 

 have inclofed in them fome petrifactions; fuch as 

 a petrified fifli in a coal-flate, which has been 

 found at Monte-Viak in the VicthUm diftrict, 



There 



