TRAVELS THROUH 



(jdes of the Apennines near Florence and 

 together with the fuperincumbent calcareous ones 

 <jf the Apennines, are in an oblique pofition dip- 

 ping from the South-eaft towards the North-weft \ 

 that is to fay, towards Florence they are rifmg 

 above, and towards Bologna they are dipping un- 

 derneath the ground. Probably they have been 

 in .the, beginning in an horizontal pofition, and 

 got an oblique dipping by the eruptions of the 

 ancient volcano at Monte < Traverfo > raifing the beds 

 on its Northern fide, and finking thofe to the 

 South, perhaps by deftroying the combuftible 

 fubftances by which they were fupported before. 

 Count Cronftedt aflerts never to have met with any 

 marine petrifactions in the grey compact limellone 

 of the Apennines ; but herein he is certainly mif- 

 taken, having perhaps intended to fpeak of the 

 cryflalline and fcaly limeflone -, fuch as that at 

 Carrara. I have myfelf conftantly found petri- 

 factions in the grey limeflone of the Apennines 

 and feveral other Alps ; though fometimes they 

 are very fcarce, and to be found only by careful 

 enquiry. Some Alpine-beds, it is true, may be 

 deftituteof petrifactions; but then other ftrata of 

 the fame Alp will be the more filled with them. 



TI-W, ' ' ' . ' ' 



Two miles diftant from Florence, near the village 

 Bobera^ rifes a hill, confiftingof mouldering; argil- 

 laceous flate, micaceous fhiftus and macigno, ftra- 



tificd; 



