64 Geological Prodromus. 
intend to demonstrate, by references to localities of easy access, 
that, 
ALL GEOLOGIAL STRATA ARE ARRANGED IN FIVE ANALAGOUS SE- 
RIES ; AND THAT EACH SERIES CONSISTS OF THREE FORMATIONS 3 
mz. THE CaRBONIFEROUS, QuaRTzosE, AND CaLCAREOUs. 
APPLICATIONS. 
FIRST SERIES. 
Ist. Carboniferous formation.—Primitive slate rocks, as gneiss, 
mica-slate, &c. contain plumbago ; often in large quantities; as in 
Sturbridge, Mass. ; on Lake Champlain, &c. 
2nd. Quartzose formation Granular quartz; as in the west part 
of Massachusetts. : 
3d. Caleareous formation,—Granular timerock ; as in the west 
part of Massachusetts. : 
= SECOND SERIES. 
Ast. Carboniferous formation.—Argillite contains anthracite, pas- 
sing into plumbago; as in Worcester, Mass., Providence and New- 
port, Rhode Island ; Troy, New York. 
2nd. Quartzose formation.—First graywacke, including the rub- 
blestone or conglomerate; as in Rensselaer county ; Shawingunk 
Mt. in New York, &c. 
3d. Calcareous formation.—Sparry limerock, ealciferous sand- 
rock, and metalliferous limerock ; as in Rensselaer, Albany, Colum- 
bia, Herkimer, and Oneida. counties; near the base of Catskill 
Mountain, &c. This underlies the slate containing the Lehigh, or 
Lackawannock coal in Pennsylvania. It is called the lower carbon- 
iferous limerock by Conybeare, Bakewell, and others. 
THIRD SERIES. 
Ist. Carboniferous formation.—Calciferous argillaceous slate 5 
being the lower division of second graywacke. It embraces the Le- 
high, or Lackawannock, coal range in Pennsylvania, and underlies 
. the conglomerate or millstone grit pear Utica, is at the basis of Cats- 
kill Mountain, &e.—Note. Bakewell quotes Farey’s name, lime- 
stone shale, for this rock, because it always reposes on limestone.— 
Note 2. Second graywacke contains tropical vegetable petrifactions, 
which entitle it to a place in the secondary class; a fact not known 
to me until this summer, (1829.)* 
: “In the lower secondary strata, the organic remains belong almost exclusively to 
the vegetable kingdom, and are analogous to the native plants of warm tropical cli- 
mates. See Silliman’s Bakewell, p. 109. 
