Urr'n ir (if Tii'ciiif (iioloqicdl Lit<f(itiii'('. 115 
I lis wliole treatment ul" it is sueli as to lead only to contusion, and tiie 
use of these terms in such an indiscriminate manner at least suggests 
the inability of the author to give exact information upon the subject 
of which he is writing. 
On page 20, he makes this statement: "South of the Arkansas the 
Dakota sandstones and shales are immediately subjacent to the grit 
and further south still the Jurassic [or the Neocomian] is in that 
position, while further east of the Jurassic is mostly missing as in the, 
valleys of tlie Canadian and Red rivers east of the one-hundreth 
meridian and the Triassie red beds are found there immediately 
under the Tertiaries." 
Does he, or his editor iox him, intend, by including the words " or 
the Neocomian " in brackets, just after the word '" Jurassic " to give 
us to understand he puts the Jurassic in the Neocomian, or is he un- 
decided to which it belongs? It would ])uzzle him very much to find 
a place in Texas east of the one-hundreth meridian where tiie Juras- 
sic was not entirely missing. 
He continues, " On the high plain of West Texas — The Llano Ksta- 
cado — the Red river has cut a gash 1,000 feet deep which shows this 
descending order of formations: 
Plains ]\Iarl. 
Tertiary Grit. 
Jurassic, 
Triassie." 
We cannot exactly locate the place of his section, as the deepest 
place on the Palo Duro canon is only nine, hundred feet, and decreases 
from that to four hundred, so the place cannot be determined by the 
depth given. Nor is there any such succession of strata as he men- 
tions, to be found anywhere along the canon of lied river. I have 
gone up the canon from mouth to head and made many dozens of 
sections and many measurements of the depth of the canon, and I 
can say with absolutely certainty that there is no such succession of 
strata to be found there. 
At the mouth of the canon there is a section showing two hundred 
feet of Tertiary, three hundred feet of Triassie, and the other four 
hundred feet of Perniian. There is not a foot of Jurassic in the 
canon ; and for that matter in that part of the state. 
The age of the Trinity sands is unsettled, or was at the time when 
this report was written, and it might have been thought that he was 
calling the Trinity sands "Jurassic," but he has taken care that we 
shall not so understand him, for in the section he gave us he men- 
tions both the Trinity sands and tli(> Jurassic (see i)age 9 of iiis re- 
port). But admitting that in his cumbersome and random way of 
expressing himself he might have meant the Trinity sands when he 
said in the paragraph last quoted, Jurassic, [or the Xeocomian] it 
would leave the matter in no better condition, for tiiere is not a 
single outcrop of the Trinity sands from the |)oiible M<»uiitain fork 
