TITLES AND ABSTRACTS OF PAPERS 168 



SIGNIFICANCE OF SORTING IN SEDIMENTARY ROOKS 

 BY E. W. SHAW 



CHEMICAL AND ORGANIC DEPOSITS OF THE SEA 

 BY T. W. VAUGHAN 



At the conclusion of the symposiimi the reading of miscellaneous scien- 

 tific papers was again taken np. 



DEFORMATION OF UNCONSOLIDATED BEDS IN NOVA SCOTIA AND SOUTHERN 



ONTARIO 



BY E. M. KINDLE 



( Abstract) 



The paper describes certain contorted beds in postglacial deposits which lie 

 between undisturbed horizontal beds. Photographs of water-laid beds formed 

 under laboratory conditions in which the features found in nature are dupli- 

 cated were shown. These experiments show a high degree of contortion and 

 disturbance in the upper beds of a section which was developed in an experi- 

 mental tank. This deformation was produced by differential weighting with 

 sand and shot, and shows that the upper beds of a section may be greatly 

 disturbed by this means without producing any disturbance of the lower beds. 

 The explanation of the contorted beds on the Avon River, in Nova Scotia, was 

 deduced from these experiments and referred to dilferential weighting by 

 superior beds, which were later removed by current scour. 



The disturbed beds which were described in old lake deposits on the north 

 shore of Lake Erie were attributed to the action of stranded icebergs and 

 floating ice in disturbing the bottom deposits of the glacial Lake Whittlesey. 



Read in abstract from manuscript. 



ILLUSTRATIONS OF THE DEFORMATION OF LIMESTONE UNDER REGIONAL 



COMPRESSION 



BY DAVID H. NEWLAND 



(Abstract) 



The Grenville limestones in the vicinity of Port Henry, New York, afford 

 numerous examples of folding of intense character, which is brought out 

 strikingly by the included amphibolite bands that have participated in the 

 process. The limestone shows accommodation to pressure by plastic flowage, 

 while the harder rock has suffered fracture and dismemberment. 



Presented in abstract extemporaneously. 

 Brief remarks were made by Mr. Arthur Keith. 



