Geological Prodromus. - 67 
Fifth Series. 
Bog ore and iron stone are found with the lignite coal of New Jer- 
sey—also in the same geological association from Fort Ann to Cox- 
sackie, a distance of eighty miles on the west side of Hudson River. 
I intend to demonstrate, that THE DETRITUS OF NEW JERSEY, EM- 
BRACING THE MARLE, WHICH CONTAINS THOSE REMARKABLE FOSSIL 
RELICS, IS ANTEDILUVIAL, OR THE GENUINE TERTIARY FORMATION. 
Between South Amboy and the Neversink River, a distance of 
about twenty miles, the marine sand (Bagshot sand) reposing on the 
marly clay (London clay) is continuous, excepting some narrow 
channels and very limited denudations. ‘The plastic clay appears _ 
beneath, the marly above and near the level of the bay, for a dis- 
tance of about three miles from South Amboy. It there seems to 
sink beneath the bay, leaving the bank of marly clay and marine 
sand in view. 
Ferruginous conglomerate and ironstone, are embraced in the 
marly clay, in one continuous stratum, varying in thickness, through- 
out the whole distance from South Amboy to the Neversink. Be- 
tween the Cheesequake and Matavan rivers, a stratum of lignite or 
wood-coal, consisting of charred cauline plants, above and in connec- 
tion with the ferruginous conglomerate and ironstone, is entitled to a 
visit from every American geologist. It consists, mostly, of charred 
wood of a large size, every where mineralized with iron pyrites. It 
may be seen in one uninterrupted stratum, three or four miles in ex- 
tent. Trunks of trees, more than twelve inches in diameter, may 
be obtained here, most perfectly charred, and mineralized with the 
pyrites. 
Between the Matavan River (called Middletown Point River) and 
the Neversink, very interesting beds of marle are embraced in the 
marly clay. Perhaps it is more correct to say, that the marly 
clay passes into this marle. As these beds have been described un- 
der the title of marl pits, in several public journals, I will merely 
state, that they are rich in fossil mineralized relics, perhaps without a 
parallel. The bones, shells, &c. embraced in them, are well pre- 
served, by being mineralized with hydrate of iron, &c. 
I intend to shew, that re Leaicu orn LAcKAWANNOCK COAL, OF 
THE STATE OF PENNSYLVANIA, IS EMBRACED IN THE SECOND GRAY- 
WACKE, AND BELONGS TO THE SECONDARY CLASS. 
I placed this rock in the transition class, but it must be removed 
‘to the lower secondary; because petrifactions, peculiar to the sec- 
