66 Notice of Mr. Schoolcraft’s View of 
would of course decide the lime stone not to be primitive, 
and therefore to be transition or secondary ; but both these 
latter kinds of lime stone are often found without shells, 
_ vegetable impressions, or any other trace of organized be- 
ings. ; : pee 
“The minerals mentioned by Mr. Schoolcraft as accompa- 
nying the lead ore, in and above the supposed primitive 
lime stone, are not such as are decisive of a primitive coun- 
try—for erystalized quartz, sulphate of barytes, caleareous 
spar, blende, hornstone, flint and pyrites, &c. are found 
long with lead ore in the Peak of Derbyshire, a transition 
country ; and they are found also in secondary countries. - 
Primitive lime stone also, we believe, (at least this is the 
fact in the magnificent formations of it in Connecticut, Mas- 
sachusetts, and other northern States) usually occurs, form- 
ing beds in the primitive rocks, especially in gneiss, mica 
slate, and clay slate; and we are not aware that it often 
orms the basis of a country ; whereas transition and secon- 
dary lime stone form immense masses, and pervade exten- 
sive regions, without’ necessa forming beds in other 
mas 
rily 
OCKS. j 
Tt would then have been more satisfactory to have had 
the mineralogical character of this lime. stone described 
with more precision, and especially to have had the order 
of succession, (if any exist) with respect to contiguous rocks 
delineated. ; Ske 
tous disposition, ‘which we ab 
found a real difficulty in conceiving clearly of the eeolosica 
nature of this lime stone, which, it ait Be the ees of the 
lead mine country, and therefore it is very important that 
