98 The American Geologist. August, 1894 
the low Pleistocene hills or from the probably Pliocene hills 
containing silicified wood, was not determined. 
Fossil bones are also said to occur along Bird creek, north 
of Oat creek and to the west id' Dunnigan's station. 
GROWTH OF KNOWLEDGE CONCERNING THE 
TEXAS CRETACEOUS. 
By Jules Marcou, Cambridge, Mass 
In a paper by Mr. K. T. Hill entitled "Geology of parts of 
Texas, Indian Territory and Arkansas adjacent to Red River" 
(Bull. Gfeol. Soc. America, vol. 5, pp. 297-338, Rochester, May, 
1894), there is an attempt to show "the progressive evolution 
of knowledge concerning the Cretaceous formation of Texas." 
and at the same time the author gives what lie calls his 
"final classification of their succession and nomenclature" (p. 
316) in a table called "Progressive Development of Knowl- 
edge of the Texas Cretaceous" (p. 817). 
The views expressed by Mr. Hill need many corrections, ad- 
ditions and suppressions to show truly with exactness the 
evolution of knowledge of Texas Cretaceous. I have elsewhere 
given repeatedly my appreciation of the work done by Mr. 
Hill in Texas and Arkansas ; that he means well, there is no 
doubt; that he has the talent to make good stratigraphical 
observations is undeniable ; but somehow he does not always 
give credit where credit is due, and is inclined too often to 
pass unnoticed over the observations and criticisms which in- 
terfere more or less with his preconceived views. Mr. Hill is 
generally obscure and unsteady in his descriptions, conclu- 
sions and classifications, seeming to have no conception of 
different fades for the same group of rocks, which leads him 
to create subdivisions neither wanted nor trulj r real. With 
these reserves and remarks I will point out the corrections 
and additions necessary to show the evolution of knowledge 
of Texas ( retaceous. 
Ferdinand Roemer is the first geologist who worked at 
Texas geology. He came into Texas at the end of 1845, dur- 
ing the month of December, and left it in April, 1N47. In 1849 
he published his volume of travel (Texas, 8vo, Bonn), con- 
