Record of Geology of Texas, 1887 - 1896 . 
251 
Take, Ralph S. 
and Extended Drainage, (c) Estuarine iConditions. (d) Young, Grow- 
ing Coast Line. 3. The Rolling, Forested Tertiary Area. (a) Topo- 
graphic Description. (ih) iMature, Consequent and Extended Drainage, 
(c) Origin of the Flood 'Plains. (d) Origin of Forests. (e) Rio 
Grande Em'bayment. 4. The Cretaceous Grand Prairie. (a) Topo- 
graphic Description, (b) The Cross Timbers, (c) Rejuvenated Pene- 
plain. 5. Central Paleozoic Denuded Area, (a) Topographic Descrip- 
tion. (b) Peculiarities of Creek Erosion, (c) Effect of the ;Superimpo- 
sition of the Colorado on the Silurian, (i) Temporary Base Level, (ii) 
Loss of Drainage Territory, (d) Adjusted 'Stream 'Courses, (e) Sum- 
mary of the History of the Colorado. G. The Arid Plateau, (a) Topo- 
graphic Description. (b) River Valleys Abandoned Through Dessieation. 
(c) Aeolian Deposits in the Pecos Valley. 7. The Trans-iPeeos Region, 
(a) Topographic Description, (b) Erosion in the Guadaloupe Moun- 
tains. (c) Quaternary Conglomerate, (d) Dessicated Quaternary Lakes, 
(e) The Rio Grande and Rio Pecos. 8. Absence of large La'kes in Texas. 
9. Summary. 10. Bibliography. 
‘This paper is based in part upon personal observation, in part upon 
the published results of others. Free use has been made of the results 
of the several geologists who have studied the Texas region, and in most 
oases direct reference has been made to the sourees 'Of information. I 
am piarticularly indebted to the 'publications of Prof. R. T. Hill for many 
geological facts and interpretations, chiefly in the Cretaceous regions where 
this author has done so much valuable work. iWith few exceptions, how- 
ever, the work done by others has been geological rather than physio- 
graphic, 'a,nd consequently I h'ave been in many cases forced to rely upon 
my own observiations alone. iSince these were made in sections only, it has 
not been possible in 'all cases to make the results as definite as could be 
desired. (My lobservations were made in 1889 and 1890, the time occupied 
in field work being almost eight months, the larger part of which was 
spent in the Central Denuded Area. Aside from this and short excur- 
sions and railroad journeys, I also made a wagon journey across the State 
of Texas from /north of Austin to the Guadaloupe Mountains in the 
Trans-Pecos region, and spent several weeks in and about these moun- 
tains. 
“The results embodied liereiu must therefore be understood to be the 
results of reconnoissiance, — preliminary exploration of a great and inter- 
esting field. iWere it possible tliat in the future I should again have the 
opportunity of studying the region I would delay the publication still 
longer; but this seems to be entirely out of the question, and I believe 
that I am justified in placing the results of my study on record to serve 
as a possible basis foir future work.’’ P. 313. 
Noticed in Amer. Nat., Vol. XXVIII, p. 50, Jan., 1894. 
401. T. F. L. 
Artesian Wells and tlie Possibility of Irrigating from them. 
Geological and Scientific Bulletin, Yol. I, Ho. 8. Houston, 
December, 1888, 
