GEOLOGICAL REPORT 
THIRTY-FIFTH PARALLEL. 
1 Septembre.—Du No. 40 an No. 41.—On 
j le diluvium R. M. avec des cailloux plus 
gros et des blocs de dolomie ou mieux calcaire 
magnesien du Trias environnant. Beaucoup 
de sables blancs tout le long de la riviere. 
A droite et a gauche on voit le New Red sand¬ 
stone ou Trias, avec quelque veines de gypse 
et un banc de 3 ou 4 pieds en hauteur de Dolo- 
mie blanche, caverneuse ou -- [?] avec 
couches rosatres comme a Salins ; des argiles 
rouges se trouvent au-dessous et au-dessus de 
ce banc de dolomie. Deux ou 3 milles avant 
d’arriver au Camp 41, on voit an milieu d’un 
grand nombre de monticules de diluvium cail¬ 
loux, et couvert de vegetation, un monticule 
conique avec uno grande quantite de blocs de 
dolomie; cela provenant du sommet. 
September 11. —From Camp No. 40 to Camp 
No. 41.—We see the diluvium of the Rocky 
mountains, with larger pebbles and blocks of 
dolomite or magnesian limestone of the sur¬ 
rounding Trias. Abundance of white sand 
borders the river on the right and left. We 
see the New Red sandstone or Trias, with some 
veins of gypsum and a bank of white dolomite 
three or four feet high, and cavernous or 
-[?] with rosy-colored beds as at Salins. 
The red clays are found below and above this 
bed of dolomite. Two or three miles before 
reaching Camp No. 41, we see, in the midst of 
a great number of hillocks of sandy diluvium 
covered with vegetation, a conical hillock, the 
sides of which are strewn with a large quantity 
of blocks of dolomite which have fallen away 
from the summit. 
12 Septembre. — Du No. 41 au No. 42.—On 
a a pen de distance du Camp No. 41, dans les 
bluffs qui dominent la route, des bancs de 
gypse de a 1 pieds d’epaisseur, et les rnarnes 
rouges etun peuvertes en places sont saliferes. 
II y a des trous d’eau tres saumatre et magne- 
sienne, insupportable au gout. On monte de 
la vallee de la Canadian au sommet du Llano, 
passant a des schistes sableux rouges et epais- 
ses avec de dolomie, 3 on 5 pieds. Diluvium 
de Rocky mountains nombreux et un peu gros. 
13 Septembre. —Au No. 42 ou nous sejour- 
nons on a un bel exemple de dolomie du Trias 
des prairies avec rnarnes rouges et vertes et 
gypse blanc, amorphe. 
September 12.— From Camp No. 41 to Camp 
No. 42.—At a short distance from Camp No. 
41, in the bluffs which overhang the route, are 
beds of gypsum from one-half to one foot in 
thickness, and the marls, which are red and 
in some places green, are saliferous. There 
are also holes filled with very brackish and 
magnesian water, which is insupportable to 
the taste. We ascended from the valley of 
the Canadian river to the summit of the Llano, 
and found the beds of red marls turning into 
red sandy shales, and strata of dolomite from 
three to five feet thick. The diluvium from 
the Rocky mountains is abundant and coarse. 
September 13.—At No. 42, where we rested, 
we found a beautiful exhibition of the dolomite 
of the Trias of the prairies, with red and green 
marls and white amorphous gypsum. 
Dolomite_ 
Red marl__ 
Red sandstone 
Red marl .... 
