206 Notice of Fossil Drees near Gallipolis, Ohio. 
tron in its composition, as the surface becomes quite 1 red, at- 
ter — heated 1 in the fire. The cortical part seems, to have 
trees ; ; and on others like black sand or em The trees 
do not project much beyond the face of the ok. but appear 
to have been broken off at the same time when the rock was 
rent in which they are imbedded. Sandstone is the princi- 
pal rock formation throughout this part of the state of Ohio, . 
forming mural precipices from 50 to 100 feet high, and in 
some places for half a mile, or a mile in extent, on the mar- 
gins of the Ohio bottoms on both sides of the river, and un- 
vines, where the superincumbent earth has been wasbed away 
by the streams; but is seen no where to better advantage, 
than near the Ohio river. It is of various qualities; mica- 
ceous, argillaceous and quartzose or “ilicious ; some so hard 
and compact as to make good mill-stones, and nearly resem- 
bling granite in color and 1 texture ; and some so fine and close 
grained as to bear the chisel of the sculptor nearly as well as 
marble. From the — of —_ fossil remains, I am | 
to conclude that the trees w reught to this spot by the 
water, at that remote period — the valley of the Ohio was— 
an ocean, and covered in a vast bed of sand by some great 
convulsion ef nature. The sand in time became cemented 
into rock, and the spaces occupied by the ligneous parts of the 
trees were, by infiltration, filled up with silicious a 
iron, with some partial attempts at carbonization. Had there 
been a large pile of trees in a body, they would probably 
have formed stone y a8is the case in the sand rock, a 
few tiles shoves but this is only conjecture. There is @ 
bed of 
Native alum 
Ans. 4. ALL. — Observations on the Climate and Productions of 
hin County, Ohio ; by Dr. SP. HitprerH- 
NG from the parallel of latitude, one would be led to 
se that the climate of ‘Washington n County, was similar 
"the eastern states, embraced in the same latitude ; 
