10 ANNUAL REPORT OF THE 



section of the Carboniferous in the Norfolk County basin at Pond- 

 ville, showing a typical section of sediments ; (2) the overthrust 

 in the Carboniferous area at Plainville, Mass. ; (3) the North 

 Attleborough collapsed anticline, including a study of Carbonifer- 

 ous felsite flows, and the Hoppin Hill Cambrian area ; (4) the 

 Attleborough syncline. 



Course 16, Glacial Geology, was attended by twelve men. That 

 part of the field work which was of a research character was 

 directed towards a study of the extension of the boulder moraine 

 at Arlington, of the moraine at Bridgewater, and of the morainal 

 accumulations of India Point and Robin Hill at Providence, R. I. 



The work in Course 22 a, in my charge, consisted of a study of 

 the complex of sediments, lava flows, and breccias of the so called 

 Wamsutta group lying in the towns of Attleborough, and North 

 Attleborough, Mass. Messrs. H. T. Burr and R. E. Burke carried 

 on investigations in this field in the autumn. This region, though 

 one of extreme difficulty on account of the complicated structure 

 of its rocks, is one of great geologic and petrographic interest, 

 because the rocks of the group named now turn out to be accumu- 

 lations of debris about a volcanic vent of Carboniferous age. Mr. 

 Ernest Haycock worked to the south of this field in the autumn ; 

 and in the winter and spring, he took up bibliographic research on 

 the Geology of Nova Scotia, supplementing his reading with an 

 excursion to the islands off the south coast of that Province in -the 

 spring recess. 



Course 22 5, Geologic Correlation, was taken by one student, 

 working on the Hamilton formation of North America. 



Among the additions to the collections of the Geological Labora- 

 tory there should be mentioned two models : one on the scale of 

 3 : 50,000 of the Dents du Midi, Tour Sallieres, and Mont Ruan, 

 Canton Valais, Switzerland ; the other, a model of Nantucket, 

 made by Mr. G. C. Curtis, on the basis of the U. S. Geological 

 Survey Atlas sheet, and colored by him after maps by Professor 

 Shaler and J. B. Woodworth. A collection of rocks, made by Dr. 

 Pfeiffer, and illustrating the geology of the district represented in 

 the first named model, was also obtained by purchase. Several 

 specimens were given to the collection by Dr. R. T. Jackson, Mr. 

 Charles H. White, Mr. J. M. Boutwell, and Professor Wolff. 



Courses 5 and 8 were repeated to students in Radcliffe College, 

 and a course of lectures, two a week, was given on Elementary 



