Vol. 70.] ANNIVERSARY MEETING WOLLASTON MEDAL. ll 



colleague in 1885 were adopted, and will be utilized in the forth- 

 coming maps and memoirs. 



Returning later to the scene of your earliest labours, with the 

 late H. A. Nicholson as your colleague, you completed further 

 palseontological zoning in the Stockdale Shales, and proved by 

 precise field-work that an appearance of unconformity between 

 the lowest zone and the Ashgill Shales was deceptive and due to 

 strike-faulting. 



In 1891, with Dr. A. Harker, you made a detailed study of the 

 effects produced by the intrusion of the Shap G-ranite upon the 

 surrounding rocks. Your familiarity with the Lake District strata, 

 combined with the petrographical skill of your colleague, enabled you 

 jointly to produce a classic account of the phenomena of contact- 

 metamorphism, as exhibited in calcareous and siliceous sediments, 

 and in igneous rocks. 



Of late years physiographical problems have engaged your 

 attention, and, as a result of your observations on mountain-lakes, 

 it may be expected that a wiser caution will be exercised than 

 heretofore in identifying rock-basins as such, and in postulating 

 glacial erosion for tarns. 



But it is not only this long record of original research, of 

 necessity incompletely outlined, which the Council have had in 

 mind in making this Award. They remember that since 1880 you 

 have been continuously engaged at your old University in assist- 

 ing the Woodwardian Professor to create the foremost school of 

 geology in Britain. The influence of your teaching in the lecture- 

 room, in the field, and as conveyed by your text-books, has extended 

 farther than perhaps you yourself realize. A happy combination 

 of the power to make original research with a facility for imparting 

 your knowledge, has enabled you to exercise a profound influence on 

 the growth of our science. 



It is, therefore, with great satisfaction that I hand to you, on 

 behalf of the Council, the highest honour which it is in their 

 poAver to bestow — the Wollaston Medal. 



Dr. Mark, in reply, said : — 



Mr. President, — 



I feel that the award of this Medal is due to a combination of a 

 number of favourable circumstances. 



I have been fortunate in having worked and published papers in 



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