146 
GEOLOGICAL REPORT-THIRTY-FIFTH PARALLEL. 
dont on se sert pour la poterie. Arrive a Al¬ 
buquerque a 3 h. 5 apres midi. 
21 Octobre. —Jusqu’au 10 November reste a 
Albuquerque, parti le 10 November dans 1’apres 
midi, Camp No. 1 a 3 milles d’Albuquerque 
sur 1’alluvion de la riviere. On trouvera le 
11 , la mesa formee de sables provenant de 
gres ; an sommet du cote de Puerco river, il y 
a un calcaire poreux, blanc friable avec petits 
cailloux d’alluvion comme la pate. 
11 Novembre.—Camp No. 2'. —On Campe 
sur le rio Puerco, pen d’eau, facilement par 
des puits. 
12 Novembre. — Camp No. 3'.—Peu apres le 
Puerco on a l’argile blanc grisatre ; avec nom- 
breux rognons de fer oxide ; quelque arbres 
fossiles, au-dessus se trouve le gres jaune, les 
couches plongent a best sous un angle de 15 a 
20 degres. Cette argile est la meme qu’au rio 
Galisteo, et contient la couche de houille a Las 
Lunas et sur plusieurs autres points du Pu¬ 
erco. Peu d’alluvion et pas gros. Le terrain 
avec argile grise a la base et gres blanc au 
sommet les argiles diminuent de puissance et 
les gres augmentent pres du Camp No. 3' ou 
Sheep spring. On voit les argiles et surtout 
gres rouge de Trias qui s’elevent dessous. L’ 
inclination est generalement a Test, sous un 
angle faible. Exemple de l'autre cote du rio 
de Lagunas et au Camp 3' on a. 
clay, which is used for making pottery. We 
arrived at Albuquerque at half-past three p. m. 
October 21.—We remained at Albuquerque 
until the 10th of November, and left it in the 
afternoon, and camped three miles from the 
town. At this camp we have the alluvium of 
the river. 
November 11.— From Camp 1 ' to Camp 2 '.— 
We traversed the mesa formed by the sand 
derived from the sandstone. On the summit, 
at the side of Rio Puerco, there is a porous 
limestone, white and friable, with small allu¬ 
vial pebbles in the paste. 
November 11.— Camp No. 21 to Camp No. 3', 
on the Rio Puerco. —There is but little water 
here, but it is easily obtained by wells. 
November 12.— Camp No. 3' to Camp No. 
63 1 .—A little beyond the Puerco we found 
greyish-blue clays, with numerous kidney¬ 
shaped masses of oxide of iron ; some fossil 
trees ; the yellow sandstone is above, the beds 
dipping to the east at an angle of from 15 to 
20 degrees. This clay is similar to that at 
Rio Galisteo, and contains beds of coal at Las 
Lunas, and several other points on the Puerco. 
Alluvium scanty and not coarse. The forma¬ 
tion with grey clays at the base and white 
sandstone at the top is found here. These 
clays diminish in thickness, and the sand¬ 
stone increases near Camp No. 3', or “ Sheep 
spring we see the clays, and especially the 
red sandstone of the Trias, rising underneath. 
The inclination is generally to the east at a 
low angle ; for example, on the other side of 
the Rio des Lagunas and Camp 3', we have 
the appearance shown in the annexed figure. 
13 Novembre.—Du Camp 3' au 4'.—On a 
gur la droit une table de gres rouge de Trias, 
environne quelquefois par des gres et argiles 
grises Jurassiques ; il n’y a presque pas d’ar- 
gile rouge, mais des gres argilleux rouges au 
November 13.—We find on the right a table¬ 
land of red stonestone of the Trias, sometimes 
surrounded by Jurassic sandstones and grey 
clays ; there is hardly any red clay, but red 
argillaceous sandstones from the summit of 
, l From this point onward, the camps are numbered to correspond with those of the main party.—W. P. B. 
