30 ANNUAL REPORT OF THE 



REPORT ON THE GEOLOGICAL COLLECTION. 



By Robert W. Sayles. 



During the past year there have been few accessions to the col- 

 lections. In July, a collection of sand-blasted pebbles was made 

 near Highland Light on Cape Cod. In August, September, and 

 October, an investigation of the annual layers in the glacial clays 

 of the Connecticut Valley was undertaken, for a comparison with 

 the annual layers in the glacial slate at Squantum peninsula. 

 From Hanover, N. H., northward for about fifty miles, clays were 

 examined on both sides of the river. Practically all the pheno- 

 mena observed in the Squantum glacial slate was found also in 

 these clays of the Connecticut River Valley. During the winter, 

 almost the entire time was used in writing a memoir, of a com- 

 parative nature, on the Squantum slate and the Connecticut River 

 clays. In conjunction with this work in the Connecticut Valley, 

 many specimens of the annual layers of the clays were taken for 

 exhibition purposes. Some of these have folds due to glacial 

 over-riding. A large number of clay concretions of unusual shapes 

 were collected at Woods ville. 



The Museum is indebted to Prof. E. L. Mark for some specimens 

 of calcareous rock of aeolian origin used for building purposes in 

 Bermuda, to Dr. Laurence LaForge, for the first striated pebble 

 found in the tillite at Hyde Park, and to Professors Woodworth and 

 Palache for other desirable gifts. 



In June, the Kilauea model, made by Mr. George C. Curtis, a 

 gift of the Curator, was formally exhibited at a private view to 

 members of the University interested in the Geological section of 

 the Museum. 



