ae a 
ace alla heel 
mts of Hot Vapor in Tuscany. 209 
‘al : .— 
to have most 
ory fronting 
the east 
more a ser- 
pentinous appearance ; the dull red globular lumps a spheroids 
being often enveloped in greenish coatings. It is no§ my prov- 
ince to allude to the: splendid veinstonesyhf copper,* oecasionally 
as been described, but which I admit is clearly a metamorphosed 
Stratum. ; 
This is a jaspidified red and green calcareous schist, marked 
by numerous thin lamin of deposit, which is evidently nothing 
more than the argillo-calcareous portion of the alberese or macigno 
formations, which happened to be contiguous to the true gabbro 
When the. latter was erupted. For it is plain that the amorphous 
gabbro (as seen in a very clear natural section) has twisted back 
these finely laminated jaspideous strata upon themselves at a point 
of eruption. That in perforating, bending back, indurating, and 
islocating the schists, the intrusive matter should have communi- 
cated its color, and to some extent its mineral composition, to the 
argillaceous and calcareous strata thus affected by it, is nothing 
More than must be looked for, and is indeed frequently found to 
be the case under similar geological conditions. ‘This appearance 
of transition, from what must be granted to be true altered sedi- 
mentary layers into the amorphous spheroidal “ gabbro,” has led 
Savi and Hamiltonsto think that the spheroidal red gabbro is 
Seer was — hospitably received at his villa by Mr. 
? 
I 
tor of the copper mines of Monte Catini. The ore is 
erits a special study. ~~ 
0. 32.—March, 1851. 27 
¥ 
aK “— 
