66 Geological Prodromus, 
series are always analogous to the general series, excepting that they 
do not embrace carboniferous minerals. 
Example 1st. The third series embraces a subordinate series, about 
two hundred and forty miles long, and twenty miles wide; whic 
runs along the south side of Lake Ontario, commencing near Little 
Falls. It is interposed between the divisions of the quartzose forma- 
tions of the series; to wit, the saliferous rock and shell grit. 
1. Carboniferous formation. Ferriferous slate. 
2. Quartzose formation. Ferriferous sandrock. 
3. Calcareous formation. Lias, embracing the gypsum. 
Example 2nd. The first series embraces a subordinate series near 
the west line of Massachusetts. It is interposed between the calca- 
reous formation of the first, and the carboniferous formation of the 
second, series. 
1. Carboniferous formation.—Gneiss, and talcose slate ; as all the 
eastern part of Saddle Mountain near Williams College. 
2. Quartzose formation.—Granular quartz ; as the west part of 
Saddle Mountain, &c. 
3. Calcareous formation.—Granular limerock ; as all the valley 
near the west line of Massachusetts. 
CARBONIFEROUS ASSOCIATES. 
Ores of iron and manganese are generally associated with the car- 
boniferous formations. : 
First Series. 
Protoxide of iron, and peroxide of manganese are found in and 
near the Green Mountain and Champlain range. Hematitic iron 
ore, and peroxide of manganese are found in the subordinates of the 
first series; as in Salisbury, Con. and Bennington, Vt. - 
Second Series. 
Hematitic iron ore of the Elba variety, and argillaccous manganese, 
are found in carboniferous slate of this series, in Rensselaer and Co- 
lumbia counties, New York. 
Third Series. 
Lenticular iron ore is found in the subordinates of this series, and 
argillaceous manganese in the carboniferous slate ; as the iron in all 
the subordinate range, and the manganese in Blenheim, New York. 
; . Fourth Series. 
Reniform argillaceous iron ore is found accompanying all the Tioga 
or Lycoming coal; and small quantities of argillaceous manganese. 
