46 PROCEEDINGS OF THE CHICAGO MEETING 



VOTE OF WELCOME TO PROF. T. C. CIIAMBERLIN 



President White then said : "I have the pleasure of announcing one of 

 the nestors of our science, our beloved former President, Prof. T. C. 

 Chamberlin, and I propose a rising vote of welcome." This was enthu- 

 siasticall}' given by the audience, who then listened to the presentation 

 of two papers, as follows : 



THE GREATER EARTH 

 BY T. C. CHAMBERLIN 



GROUNDWORK OF THE EARTH'S DIASTROPHISM 

 BY T. C. CHAMBEELIN 



These two papers are printed in full in this volume. 

 Adjournment for luncheon was taken at 13.30 o'clock. 



Session of Wednesday Afternoon, December 29 



The Society reconvened at 2.15 o'clock, with President I. C. White in 

 the chair and H. L. Pairchild acting as Secretary. 



titles and abstracts of papers presented at the afternoon session 



AND discussions THEREON 



The first paper presented was entitled 



SOLITARIO UPLIFT, PRESIDIO-BREWSTER COUNTIES, TEXAS 

 BY SIDNEY POWERS 



(A/bstract) 



Intensely folded Lower Paleozoic rocks are exposed in only two uplifts in 

 Texas, the Marathon and the Solitario Domes, both on the edge of the Cor- 

 dilleran Mountain chains. In both the Marathon and Solitario areas the 

 highly folded Paleozoic rocks are exposed in unroofed Cretaceous domes and 

 the strike of the isoclinal folds is northeast-southwest. This shows that tlie 

 folding is Appalachian, not Cordillerau, but the connection with the Ouachita, 

 Arbuclde, or Wichita Mountains is not clear. 



The Solitario consists of a perfectly circular rim of Lower Cretaceous lime- 

 stones 7 miles in diameter, rising as jagged saw-tooth peaks and dipping out- 

 ward at angles of 30 degrees to 70 degrees, within which are lower hills com- 

 posed of Ordovician shales (Marathon and Maravillas formations), Devo- 

 nian (?) Novacolite (Caballos), Pennsylvanian shales and sandstones (Tesnus 

 formation), and limestones (Dimple formations). In the center of the vui- 

 roofed Cretaceous dome a portion of the original Cretaceous cover is left, 



