The Mesozoic Series of New Mexico.— Marcou. 22c 
and flora belong simply to the upper Coal Measures, and even 
only as a sub-division or sub-etage of the 4th order ! 
V. — Table showing the classification of the Mesozoic serips of New 
Mexico, the Panhandle of Texas, and the Indian territory. 
J. Marcou, 
1S53. 
James Hall. 
1857. 
J. S. Newberry. 
1857-7G. 
J. J. Stevenson. 
187!)-Sfl. 
1 
Upper 
Cretaceous 
or 
AVhite Chalk 
(N.Mexico.) 
Upper and 
Middle 
Cretaceous ; 
II., III., IV., V. 
Upper 
Cretaceous. 
Laramie group. 
Colorado group. 
s - 
o 
u 
o 
< 
H 
w 
6 
Middle 
Cretaceous 
(Indian Ter.) 
Lower 
Cretaceous 
(Neocomian) 
(Indian Ter.) 
i 
o 
C 
6 
g 
o 
3 
g 
So 
1 
o 
bD 
1 
Jurassic 
System. 
(Tucumcari.) 
P 
Triassic 
System. 
(Along the Cana- 
dian river.) 
Triassic. 
(in part.) 
-^^-~~Linear Out- 
crop of Jura- 
Trias. 
Dyassic System. 
(Topoki creek 
and Colorado 
Chiquito.) 
Permian 
or Trias. 
2 
3 
Carboniferous. 
Carboniferous. 
Carboniferous. 
o 
Conclusions. When I entered on the very broad area of 
Mesozoic strata, on the 35th parallel, I was happily prepared 
by a rare training, for the work before me.' During 1846, '47 
and '48 I had published the most detailed and rational classifi- 
cation of the upper Trias, of the whole Jurassic system, and 
* The undertaking of a crossing from the ^Mississippi to the Pacific 
shores was considered then, 1853, so hazardous, that all the geologists 
of any standing, to which the offer to accompany the three expeditions 
sent by the government for the Pacific railroad explorations was made, 
declined to go. Strongly pressed by professor Henry of the Smithso- 
nian, who made me the offer, entirely unsolicited by me, and who 
proposed to me to choose the road and expedition which pleased me 
most, by a happy chance, I took the most southern road, where the 
Mesozoic series is found covering two-thirds of the distance, and 
where it is more developed than on any other line across the con- 
tinent. 
