Geological Prodromus. 65 



iind. Quartzose formation. — Millstone grit, red sandstone or sa- 

 liferous rock, rubblestone, common grayvvacke ; 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, he. — Note. Bakewell calls tliis the upper carbon- 

 iferous 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, &tc. 



3d. Calcareous formation. — The oolite lately discovered in large 

 fields in Ohio. — Note. The chalk of Europe belongs to this for- 

 mation. 



FIFTH SERIES. 



1st. Carboniferous formation. — Plastic clay and marly 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. (^uartzose formation. — Marine sand, (or Bagshot sand,) which 

 overlays the marly clay in almost every part of North American. 



3d. 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 

 Vol. XVII.— No. 1.9 



