240 
Transactions Texas Academy of Science. 
385. Taff, J. a. 
Eeport of. 
Third Arm. Eept. of the Geol. Snrv. of Texas, 1891, pp. lix-lx. 
Austin, 1892. 
■Administrative 'Keport. Outline of. Work for the field season of 1891. 
Acknowledgments. 
“It was necessary that further investigations he made upon the geology 
of the Trinity, Olen Rose, and Paluxy beds, which compose the Bosque 
division, in order to better determine their stratigraphic and taxonomic 
relations to each other. Accordingly, I took the field April 15, 1891, and 
made careful sections across these rocks along the valleys of the Bosque 
river in lErath, Hamilton and Bosque counties, Brazos river in Parker 
county. South Fork of Trinity river in Parker county, and the West Pork 
of Trinity river in Wise county. The work was finished May 8th, 1891, 
and the results are incorporated in my account of the geology of the 
iBosque division. * 
“According to your direction, i * * * began the study of artesian 
water conditions of Southwest Texas, more especially that portion south 
of the Southern Pacific Railway. Investigation was taken up along the 
line of the Mexican National from Corpus Christ! to Laredo, beginning 
May 27th, 1891; thence to Cotulla along the International and Great 
Northern Railway, and thence up the Nueces and Leona river valleys to 
Montell, Uvalde county. * * * 
“The line of parting between the Upper and Lower Cretaceous was 
traced from the Nueces river valley to Austin; also a study was made 
of the Baloones fault, and its line located almost continuously from the 
Nueces to the Colorado river valleys. Much valuable data were gleaned 
from the basaltic outbreaks which occur associated with the Balcones fault 
in the Nueces, Leona, Frio, Hondo, and Medina river valleys. * * * 
“After completing the work, I began the study of the Cretaceous system 
north of the Colorado river in a typical area across Lampasas, Burnet 
and Williamson counties.” 
386. 
Eeport on the Cretaceous Area north of the Colorado Elver. 
I. The Bosque Diyision. II. The Lampasas Williamson Sec- 
tion. 
Third Ann. Eept. of the Geol. Survey of Texas, 1891, pp. 269- 
379. 6 plates; 2 figs.; map by J. A. Taff and S. Leverett. Aus- 
tin, 1892. 
Contents: Preface — General Geologic and Petrographic Features. 
Upper Cretaceous’. Lower Cretaceous. Brief Outline of the System North 
of the Colorado — Lower Cretaceous (Comanche) Series. Upper Creta- 
ceous Series. Part I. The Bosque Division — Introduotion. Trinity Sand. 
Glen Rose (Alternating) Bed. Paluxy Sand Bed. Detailed Section of 
the Bosque Division. The Colorado Section. Bosque Section. Hood 
County Section. Correlation with other Sections. The Columnar Sec- 
