82 PROCEEDINGS OP THE WASHINGTON MEETING 



glaciers. .These lakes are not only filled with icehergs, but in one case 1 a lake 

 is known to contain a large arm of the glacier, which floats on the surface of 

 the lake and forms the larger part of its area. The occurrence of till over- 

 lying the clays in the former bed of Lake Bascom may possibly be explained 

 as the residue from the melting of a large amount of heavily debris-laden 

 glacial ice that floated on the surface of the lake and that was left stranded 

 on the lacustrine deposits when the lake was drained. The presence of many 

 bergs and possibly of a floating glacial arm in Lake Bascom may also explain 

 in part the poor development of beaches. 



Further remarks were made by Messrs. M. B. Baker and H. F. Cleland, 

 with reply by the author. 



TYPES OF LOESS IN THE MISSISSIPPI VALLEY 

 BY B. SHIMEK 



(Abstract) 



The gray loess and two types of yellow loess of the Upper Mississippi Valley 

 and the red and yellow loesses of the South are discussed with reference to 

 geographical distribution, differences in structure, color, and fossils, and the 

 significance of these differences. The conclusion is drawn that these types 

 indicate in part differences in time of deposition and in part differences in 

 source of materials. Incidental references are made to deposits which resemble 

 loess and have been so classed. 



Presented by title in the absence of the author. 

 Society adjourned at 5.20 o'clock p. m. 



PRESIDENTIAL ADDRESS 



At 8 o'clock p. m., at the Cosmos Club, Prof. A. P. Coleman delivered 

 his address as retiring President, his topic being 



DRY LAND IN GEOLOGY 



Published as pages 175-192 of this volume. 



The address Avas followed by the complimentary smoker given in honor 

 of the Geological Society of America and the Paleoiitological Society by 

 the local members of the former organization. The address of the Presi- 

 dent was the most largely attended session of the meeting, about 300 

 persons being present. 



1 G. C. Martin : Geology and mineral resources of the Controller Bay region, Alaska. 

 U. S. Geol. Survey, Bull. 335, 1908, pp. 47-48, pi. via, 



