Record of Geology of Texas, 1887-1896. 
69 
Cummins^ W. F. 
Mr. Cummins here offers a vigorous protest against the substitution of 
‘Talo Duro” for his term “Goodnight,” which appears in a paper on “The 
later 'Lacustrine Formations of the West,” read by Professor W. B. Scott, 
an abstract of which appears in the Bulletin of the Geological Society of 
America, Vol. V, p. 94 (1894), and in several places in the Fourth Edition 
of Dana’s Manual of Geolo^gy. Mr. Cummins contends that inasmuch as 
he both discovered and described the beds, which occur five miles south- 
west of the town of Goodnight, in Armstrong county, Texas, and collected 
the fossils described by Professor Cope, and inasmuch as the beds do not 
occur in or near Pala Duro Canon, that his name of “Goodnight Beds” 
should stand by right of priority, and that it would be a ihisnomer to 
call them “Palo Duro.” 
'See Scott, W. B., “A Question of Priority,” No. 348. 
So. Curtice, Cooper. 
Discussion of R. T. HilFs paper on Comanche Series of the 
Texas- Arkansas Region.^’ 
Bulletin Geol. Soc. of America, Vol. II, pp. 527-528. 1891. 
“To what has already been said in regard to the erosion of the escarp- 
ment surrounding the central basin of Texas, I wish to contribute the fol- 
lowing remarks: 
“In going from Burnet, Texas, situated on the edge of the escarpment, 
southward to Marble Falls, on the Colorado river, one successively crosses 
the following strata: lower Cretaceous, Burnet Marble series (either Car- 
boniferous or Silurian), Potsdam, Capitol granites, and Carboniferous. 
The Burnet Matble appears to abut against the Potsdam sandstone. The 
sandstones rest horizontally upon the granites, and their lower beds are 
made of small masses of feldspar and quartz entirely like that of the 
granitej The summits of the sandstone beds rise over a hundred feet higher 
than the Carboniferous at iShinbone ridge, which they approach to within 
a couple of miles. 
“The semi-crystalline limestones of 'Shinbone ridge abut against the 
granites, but dip away from them. Carboniferous fossils were found within 
a very short distance from the contact in an abandoned prospect hole. 
(These limestones were on a level with the granites, or about on a level 
with the base of the Potsdam sandstone. 
“On the road westward from Burnet to Bluff ton the following exposures 
were observed: Near /Spring creek, a contact of the Burnet marble with 
Potsdam (Lwpwiu-bearing) sandstones, with the Potsdam lying on gran- 
ites ; between (Spring creek and Clear creek, apparently stratified granites ; 
at Clear creek, upturned Paeksaddle schists, with inclosures of the gran- 
ites. (The granites underlying the Potsdam and intrusive into the Pack- 
saddle schists were apparently of the same, mass. 
“Potato hill lies about a mile north of fhe Clear creek crossing and two 
miles west of the escarpment. It is entirely composed of Potsdam sand- 
stone, and its top is on a level with the crest of the adjacent escarpment. 
Its .strata dip gently toward the northwest. • Conocephalites tripunctatus 
(or roemeri) , a fossil peculiar to the middle of the Potsdam series, occurs 
in its topmost bed. At the foot of the escarpment, a little north of east 
