Mineralogy and Geology. 275 
river may be regarded as belonging to the coal formation, but the line 
eannot be defined in all its meanders until the detailed survey shall have 
ian, Todd, Butler, 
, Hancock, and 
their topography plotted | acnrately, as has been ee of Union 
_ and a of Crittenden unties 
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Upp r and Lower Coal Measures. hese are. separated from each 
other not only by a prominent sandstone ere: but they have been 
east off from suntanetiy: immediately on the Ohio river, by an extensive 
uplift and a of the geological arate pitch stretches from 
| _ Gold Hill, on the Mlinois eae of the Ohio river, across the bed of that 
stream, at idan neetown, to Bald Hill, in Union county. 
| J The ‘Topographical Assistant, in his detailed sur vey of a county, 
has traced a continuation of this ae in a near] and west 
disturbed belt has an increased width, + the boundary of Henderson 
county. Beyond this point it has not yet been 2 get 3 gaan ce followed ; 
but the occurrence of disturbances, with a reversal of dip, n e con- 
a fluence of Pond and Green oe render it probable that it can ie traced 
a completely through the co 
In Ken cag there is no ; ocd whatever that this  eepianti oc- 
curred prior to the deposition of the coal measures; on the contrary it 
j has ~*eamagh in its movements not only the Bubcatbaniferous, Tinséatodls 
’ and Mills it, but also the entire coal herd which lies in con- 
| 3 formable ap. on either ei of thea axis. Ai abe ortheast edge of Union 
sane | basin, For a limited space ay the Ohio river, t = Shawneetown 
fault has rent asunder the coal measures, and thrown off the upper coal 
heasures to the north, and the lower coal measures to the south; but in 
the ‘interior of Union county the upper coal measures occur on both sides 
of th ti it is broken for a certain 
‘ the disturbance, and, though their continui 1 de ee a cigeaf the 
called the Anvil Rock. a name originating from the accidental sett 
Masses in Uni ok uunty, aot Kentucky. The thickness 
of the beds of the lower are over 900 feet, and they contain ten work- 
hye of coal, one of them about five feet thick and the others one 
three feet. Ave erage specific gravity of the coal 1284, giving very 
