resume and field notes. 
143 
9 Octobre. — Du Camp A, Humboldt, au Camp 
B, Douglas, or Antonitto. —On a le carbonifere 
inferieur jusqu’au village de Tejera, oucomme 
le Trias, le coal a ete trop comprimet n’ap- 
parait pas. Le carbonifere a 2,000 peids, le 
Trias 4 ou 5,000 ; derriere San Antonio, on a 
le gypse blanc et toute notre route jusqu’au 
Camp Douglass est sur le Trias. Alluvion 
seulement des montagnes, sans cailloux stries, 
on a d’immenses blocs erratiques. 
October 9.— From Camp A, Humboldt, to 
Camp B, Douglas, or Antonitto. —We have the 
inferior Carboniferous as far as Tejera vil¬ 
lage, where, as the Trias, the coal has been 
too much compressed and does not appear. 
The carboniferous has a thickness of two 
thousand feet (2,000,) the Trias four or five 
thousand (4,000 or 5,000.) Behind San An¬ 
tonio we find white gypsum, and all our route, 
as far as Camp Douglas, is on the Trias. Allu¬ 
vium from the mountains, and without striated 
pebbles. We have immense erratic blocks. 
a. Alluvium, b. Granite, c. Serpentinoid Trap, d Carboniferous, e. Trias. 
10 Octobre.—Camp B ou Douglas. —Ascen¬ 
sion d’Albuquerque mountains 10,000 pieds. 
Direction N.S. Les couches plongent a Test 
sous un angle de 25° a 30°. Le Gold mount¬ 
ain est raoins eleve que Albuquerque. Du 
Camp Douglas, on suit un canon dans l’upper 
Trias pour un mille et demi; puis on com¬ 
mence avec le calcaire gris blanc, noiratre du 
carbonifere; le coal ne parait pas, il a ete trop 
serre ; immediatement on trouve dans le car¬ 
bonifere, les Productus giganteus, punctatus; 
Terebratula; Spirifer; Ortliocera, Zaphrentis, 
Crinoids ; Zaphrentis tres-abondant. Le coal 
se trouve plus au sud dans le Manzana mount¬ 
ain. Quelques assises de schistes noirs, tres 
minces se trouvent entre les assises de calcaire 
compactes de quartre et six pieds d’epaisseur; 
rognonsde silex noir dans le calcaire, au sommet 
le calcaire est un peu marneux, avec silex, com- 
me le calcaire du Fort St. Andre. Dans le 
canon pas de. traces de glaciers visibles. La 
coupe a beaucoup d’analogie avec celles d’hier. 
Quelques assises de gres rosatre tres dur sont 
interposees dans le calcaire ; l’un de ces gres 
est a gros grains roules. Le calcaire domine 
de beaucoup. 
October 10.—We ascended the Albuquer¬ 
que mountains ( Sandia mountains) 10,000 feet 
high. They are surmounted by the limestones 
of the inferior carboniferous. The direction 
is N. and S., and the rocks dip to the east¬ 
ward at an angle of from twenty-five to thirty 
degrees. Gold mountain is less elevated than 
Albuquerque mountain. From Camp Doug¬ 
las we followed for one and a half miles a 
canon in the upper Trias; then we commenced 
with the greyish-white, blackish limestone of 
the carboniferous formation ; the coal does not 
appear—it has been too much compressed. In 
these carboniferous rocks we found the follow¬ 
ing fossils: Productus, giganteus and punc¬ 
tatus; Terebratulce, Spiriferce, Ortliocera, Za¬ 
phrentis and Crinoids ; the Zaphrentis was very 
abundant. Coal is found further to the south, 
in the Manzana mountains. Several beds of 
black shales, four to six feet in thickness, and 
very thinly stratified, are found between the 
beds of compact limestone. Kidney-shaped 
masses of black silex are present in the lime¬ 
stone, and at the summit it is a little marly, 
with silex, like the limestone of Fort St. 
Andre. There are no visible traces of glaciers 
in the canons. The section is much like that 
seen yesterday. Some beds of very hard and 
rose-colored sandstone are interposed in the 
limestone. One of these beds is of coarse 
rolled grains. The limestone is the predom¬ 
inating rock. 
