R. T. Mill— Cross Tim 
. 
bers in Northern Texas. 299 
Pacific Railroad, from Elmo, Kaufman County, to Millsap, Parker County, and, with local Variations of 
Based upon personal Observation. 
By Robert T. Hill. * 
PALEONTOLOGY. 
OcCURRENCE ALONG TEXAS Pactric R.R. 
Van Zandt Co. west to Elmo. 
‘* T have been able to recognize the following species: 
common to the Tippah (Miss.) and Navarro (Texas) 
beds: Nautilus Dekayi, Baculites Tippaensis, B.) 
Spillmani, Purpurea cancellaria, Rapa supraplicata, 
Strombus densatus, Ficus subdensatus, Pleurotoma 
Ripleyana, Pholadomya Tippana, P. elegantula, 
. P.chycardium Spillmani, Legumen elliptica, Sili- 
quaria biplicata, Pecten simplicus, P. Burlingtonen- 
sis, and Exogyra costata.’’—B. F. Shumard, Proc. 
Bost. Soc. Nat. Hist., 1861. 
Inoceramus biformis, Gryphea vesicularis, Exogyr@ 
costata, Ostrea anomiaformis, Arce vulgaris, Radio- 
lites Austinensis, Nautilus Dekayi.Baculites anceps, 
Helicoceras, Ammonites, Cassidulus equorus, He-; 
miaster parasutus.—B. F. Shumard, Aug., 1860. 
Most of Reemer’s species from the Cretaceous at the 
foot of the highlands are from the Austin Lime- 
stone and the upper (Ripley) beds. 
Dr. Shumard’s list includes forms of the over and 
underlying beds.—R. T. H. 
Ostrea bellaplicata Shum. 
Elmo and Terrell, a 
Terrell to concealed point fifteen miles west of 
Dallas. 
Narrows southward towards Rio Grande. This and 
all the succeeding members are exposed along north 
and south lines from Denison to beyond New Braun- 
pels, and can be transected by going from east to 
west. They thicken southward. 
From above point east of Dallas to Eagle Ford, seven 
miles west of Dallas. 
jEscarpment, two miles south of Eagle Ford, and 
along north and south line to Denison. 
Corax, Lamna, Otodus, and other vertebrates in the 
upper half. 
Only zone of Inoceramus problematicus, Ostrea con- 
gesta, and various undetermined Ammonitide. Blue 
shales at base are barren. 
Along face of escarpment and underlying prairie 
from Eagle Ford to seven miles west. Also at 
Denison. : 
Ostreide, lignites, etc. 
Lower Cross Timbers, from point few miles east of 
Arlington fo eight miles west. Thins out to south. 
FORUITY BY EROSION. 
Ostrea crenulimargo, Turritella pariochit, Nucula, 
Corbula, etc. 
Many species of off-shore fauna, mostly undescribed, 
_ in upper bed. Many forms from below. Anan- 
chytes ovatus, Lima Wacoensis, Ammonites Swal- 
lovii, Janira occidentalis, J. Texana, Gryphza| 
sinuata, Marcou ; Ostrea Marshii, Marcou; G. Pitch- 
eri bed aceompanied by O. carinata, 
A. vespertinus, formerly A. Texanus. Ancyloceras 
annulatus, Inoceramus. 
The forniculate and naviate varieties of G. Pitcheri’ 
abundant. ~ 
Ammonites acutocarinatus, Shum., and all of Shu- 
mard’s typical Comanche Peak ‘fauna in greater 
abundance. 
“Comanche Peak” fauna, with Hippurites Tex- 
anus ; Caprina, Requienia, etc. | 
Over fifty species have been described which belong 
here. See Shumard’s section. The Gryphea bed| 
No. 2, with O. Matheroniana, is part. 
Culmination of Requienia Texana ; ; Panopea and many! 
bivalve casts. 
Vertebrate remains “only, ‘Dinosauride, “Chelonidze, 
etc, 
Missing at Fort Worth, having been eroded away pre- 
vious to deposition of above group. 
This upper portion of the Texas Cretaceous occupies 
a narrow area from Fort Washita to San Antonio ; is 
especially well exposed along Missouri Pacific R.R. 
Nearly the entire series can be found in a short dis- 
tance from the city of Fort Worth. 
Between Fort Worth and Weatherford, forming base 
of high prairies. 
Six miles west of Fort Worth, south of Ben Brook, 
ete. 
Top of this group first exposed in bed of Trinity, 
Fort Worth. Highest summit Ben Brook Station. 
Traces on buttes 8. of Weatherford ; typical at Co- 
manche Peak. 
Well displayed i in vicinity of Weatherford, from which 
point to Millsap, ten miles west, the remainder of 
this section is regularly exposed in descending 
series. 
Upper Cross Timbers, few miles west of Weatherford, 
to Millsap Station ; Sand Hills of Staked Plains. — 
Millsap Station. 
(8) Proc. Bost. Soc. Nat. Hist., vol. viii, 61. (4) Ten 
th Census Rep. on Cotton Production, 84, p. 18. 
DECEMBER 23, 1886, 
worn away entirely.. In the section of the State under consid- 
eration this western edge forms an escarpment, as seén along 
Mountain Creek, in Dallas County (6). 
+ In the region of the State between 
San Antonio and Austin the escarpment 
relation of the two formations is reversed, the Gulf Cretaceous being deposited 
there at the foot of the disturbed Texas. 
e 
