

OPERATIONS OF THE GEOLOGICAL CORPS. O 



areas. The general report on the geology of southern New Brunswick, 

 'by Messrs. Bailey, Matthew and Ells, contains a brief summary of the 

 earlier reports on this region, and it expresses the present views of the 

 authors respecting the distribution, structure and relation of the several 

 groups of strata, the subject being further illustrated by the geologi- 

 cally colored maps and sections, with descriptive notes, which 

 accompany the report. 



In this report and in the accompanying maps, the term Silurian is Use of the 

 restricted to tho*e formations which have hitherto been designated Cambro-Siln- 

 Upper and Middle Silurian, embracing the Lower Helderberg, brian." 

 Onondaga, Gruelph, Niagara, Clinton, Medina and Oneida groups. 



The term Cambro-silurian is used for the formations constituting the 



Trenton group, viz., Bird's Eye, Black Biver and Trenton limestones, 



Jl Utica slates, Loraine or Hudson Biver shales ; while in the term 



/ I Cambrian are included the Chazy, Calciferous, Quebec group, Potsdam, 



! St. John and Menevian groups, down to the summit of the Huronian. 



> I It having, in many cases, been found impossible to identify, trace out 



' and define the limits of the above-named sub-divisions, it has become 



necessary to adopt the more comprehensive nomenclature, and at the 



same time to define its precise signification as now used, and as it is 



proposed henceforth to use it in the reports and maps of the Canadian 



Geological Survey. 



In the palaeontoloe-ical and natural history branch Mr. Whiteaves, Paiaeontolo- 



1 ° d ill Sical branch. 



assisted by Mr. Foord, has accomplished a large amount of valuable 

 work, some of the details of which appear in the accompanying reports. 

 This work also includes the examination of numerous and large col- 

 lections from all parts of the Dominion, amounting probably to more 

 than 7,000 specimens, and the determination and naming of a number 

 iof the species, also the commencement of the descriptions and figures of 

 j the fossils from the coal-bearing rocks of the Queen Charlotte Islands for 

 the third part of the first volume of "Mesozoic Fossils," and the select- 

 ing, naming, labelling and cataloguing of twelve collections of charac- 

 teristic Canadian fossils, which have been presented to various 

 educational institutions in the Dominion. 



In addition to making collections in the field during the summer, ^°* of w ton 

 Messrs. Weston and Willimott have been occupied in arranging the and wuiimott. 

 specimens in the Museum, and in preparing others for exhibition and 

 distribution. Mr. Weston has made and mounted for microscopic ex- 

 amination upwards of one hundred and fifty slices of rocks, and has 

 also made colored drawings of a number of them under the camera in 

 the microscope. 



Twenty-eight collections of Canadian rocks and minerals, containing of^e'etoens. 



