Mineralogy and Geology. 273 
are beginning to know the country we inhabit, and develop its abundant 
resources. Kentucky is now adding her part to the rock-map of the con- 
tinent, and we trust the work over that large state will be carried on until 
its geology is thoroughly understood. Her.coal and iron beds are in- 
aneey enough for extended research, if these were the only results to 
@ state are briefly mentioned as follows :— 
This includes all those fine deposits of comparatively recent date, which 
appear to have settled in wide expansions of our great rivers, just previous 
tothe time when they contracted into their present channels, together 
with the associated gravel beds. 
(2.) The Coal Measures: embracing the sandstones, shales, ironstones, 
millstone grit, and conglomerate, together with the limestones associated 
with the workable beds of coal. 
(3.) Subearboniferous Limestone, chert and fine grained sandstones 
meg the strata on which the coal measures repose, and extending down 
(4.) Black Lingula Shales: i.e. all the dark argillaceous beds on 
which the Subcarboniferous sandstones and limestones of the Knobby 
Regions rest, near the mouth of Salt river, the head of Green river, and 
key Neck Bend, belonging to the Devonian Era. 
(5.) Grey Coralline Falls Limestones, including the limestones under 
the black shal i 
Secur on rass and elsewhere in Jefferson county. 
(7.) The Blue, Shell and Birdseye Limestones of Fayette and Franklin 
om and throughout most of the so-called Blue-grass counties of — 
iddle and Northern Kentucky. : 
_AS yet no formations of more ancient date than this latter have been 
discovered ; hence, all its formations, so far as at present known, belong 
of th se ; 
bel € bone deposit on Canoe Creek, a tributary of the Ohio, five to six 
ow Henderson. The bones belong to the Megalonyx Jeers: — 
: inary low stage of water. With them occur, in the 
nous sand, shells of Paludina ponderosa, Melania canaliculata, 
SECOND SERIES, VoL. XXIII, NO. 68.—MARCH, 1837, 
