456 DESCRIPTIONS OF ROCKS. 
Essex, and Nelson counties, and elsewhere. Formsasmall bed in the 
Upper Silurian of Bernardston, Mass., and in Devonian, at Moose River, 
in Nova Scotia. 
4. Menaccanyte. (Zitanic [ron Ore).—Resembles massive 
hematite, but consists chiefly of titanic iron (p. 178). Oc- 
eurs in the Archean of Canada, as in the parish of St. Ur- 
bain, at Bay St. Paul, where the bed is ninety feet thick. 
5. Franklinyte——Resembles massive magnetite, but con- 
sists of franklinite (p. 179), which differs from magnetite in 
containing more or less zinc and manganese. 
Occurs at Mine Hill, in Hamburg, N. J., and also at Stirling Hill, in 
the same region, constiti uting a bed of great thickness. It is mixed 
with zinc ores, zincite and willemite, besides other minerals, and asso- 
ciated with eranular limestone, in an Archean region of hornblendic 
and gneissoid rocks. 
For non-metamorphic kinds of iron ores, see under HEMATITE 
(p. 176), LiMonITE (p. 181), and SIDERITE (p. 185). Beds of magne- 
tite occur only in metamorphic regions. 
ty 
