Geological Prodromus. 65 
2nd. Quartzose formation.—Millstone grit, red sandstone or sa- 
liferous rock, rubblestone, common graywacke; as near Utica, in 
Catskill mountains, in the mountains of Pennsylvania over the Le- 
high range of coal, &c. 
3d. Calcareous formation.—Geodiferous and cornitiferous lime- 
rock, as in Lockport, Black Rock, Seneca and Cayuga Lakes, un- 
der the Tioga or Lycoming coal, top of the Helderberg Mountain in 
Albany county, &c.—Note. Bakewell calls this the upper carbon- 
uferous limestone. ; 
FOURTH SERIES. 
1st. Carboniferous formation.—Pyritiferous slate. It embraces 
the Tioga, or Lycoming coal, in Pennsylvania. It forms the south 
shore of Lake Erie, chief of the banks of Seneca and Cayuga 
Lakes, the banks and bed, at the upper falls, on Genesee River, &c. 
It is the pyritous shale of Whitby in England, or it might be called 
the upper limestone shale of Farey. 
2nd. Quartzose formation.—Pyritiferous grit, conglomerate or 
rubblestone, ferruginous sandstone, and coarse graywacke ; as on the 
Genesee River, near the line between New York and Pennsylva- 
nia, &c. 
3d. Calcareous formation.—The oolite lately discovered in large 
fields in Ohio.—Note. The chalk of Europe belongs to this for- 
mation. : 
FIFTH SERIES. 
Ist. Carboniferous formation.—Plastic clay and oe clay, 
(London clay.) They embrace the lignite, or wood coal of New 
Jersey, in a regular stratum of great extent; as may be seen in the 
south bank of the bay of Amboy, from Middletown Point to the 
Cheesequake Creek. 
2nd. Quartzose formation.—Marine sand, (or Bagshot sand,) which 
overlays the marly clay in almost every part of North American. 
Calcareous formation.—Shell-marl. This is justly entitled 
to a place among the general strata; for it is almost universally de- 
posited in the bottom grounds of both continents. We find it in the 
elevated bottom grounds of the primitive Green Mountains, as well 
as in the vast low grounds and swamps of the western secondary class. 
SUBORDINATE SERIES. 
Some of the general series embrace subordinate ones, which are 
of an extent more or less limited. The formations of subordinate 
Vor. XVIE—No. 1. 
