66 



SCIENCE. 



[N. S. A'OL. I. No. 3. 



Mr. Darton described the opening up of 

 tliis new boss of peridotite in the building 

 of a reservoir. Tlie wall rock is Salina 

 shales, and the geological section of that 

 part of the state was outlined in explana- 

 tion. J. P. Kemp described the rock as a 

 very fresh peridotite as these rocks go, with 

 perfectly unaltered olivines and a ground 

 mass of small augite crystals, with what 

 was probably originally glass. Gabbroitic 

 segregations were also mentioned contain- 

 ing feldspar. The interest of the rock lies 

 in the fact that it gives much fresher mater- 

 ial than that described by Dr. G. H. Wil- 

 liams from Syracuse, in which the larger 

 original minerals were represented onlj^ by 

 alteration products. No perofskite or me- 

 lihte could be found in the Dewitt material. 



Professor B. K. Emerson exhibited re- 

 markable pseudomoi-phs of olivine from a 

 rediscovered though long lost mineral lo- 

 cahty in Massachusetts, and corundum with 

 interesting enclosures. 



The section then adjourned with the in- 

 tention of having an exhibition of rock sec- 

 tions the following morning in the same 

 place. 



A goodly audience greeted President 

 Chamberlin at 7:30 in the evening for the 

 anniial presidential address, the subject be- 

 ing Recent Glacial Studies in Greenland. 

 The speaker brought out the distribution of 

 the ice sheet over Greenland, described his 

 observations at Disko Bay and elsewhere 

 and his final location at Lieut. Peary's sta- 

 tion, Inglefleld Gulf. Many pecuUar feat- 

 ures of Greenland glaciers were brought out, 

 such as their rampart-like terminal cliffs, 

 their general foliation or banding and en- 

 closed debris, their causeways of morainic 

 material, etc. The glaciation is thought to 

 be now near its maximum extent because 

 just beyond the ice are unglaciated areas 

 and jagged islands that have never been 

 covered. A large series of lantern views 

 followed and brought out still more forcibly 



the points of the address. President Cham- 

 berlin was listened to with close attention 

 during the two hours occupied, and all thor- 

 oughlj' enjoyed the lecture, but it is never- 

 theless true that an hour and a quarter, or 

 at most an hour and a half, is about as long 

 as a speaker can wisely keep a general 

 audience. 



The Society reassembled in the geological 

 laboratory about ten o'clock for the annual 

 supper. After an excellent menu had been 

 cared for, Professor B. K. Emerson was cho- 

 sen toastmaster, and by his characteristic 

 sallies, in which he was ably aided by several 

 speakers, resolved his hearers into inter- 

 mittentlj^ active spiracles of mirth upon the 

 lava sti-eam of his wit. 



When the Societj' reassembled on Satur- 

 day morning the first paper read was 



38. The Marginal Development of the Miocene 

 in Eastern New Jersey. Wm. B. Claek, 

 Baltimore, Md. 



The deposits which characterize the mar- 

 ginal phase of ISTew Jersey Miocene in Mon- 

 mouth and Ocean counties were especially 

 discussed. The gravels, sands and clays 

 were considered and their relations shown, 

 together with the occurrence of giauconite 

 in certain areas. The connection of the 

 sti'ata in the northern counties with the 

 highly fossiliferous beds in South Jersey 

 was explained. The paper was discussed 

 by IST. H. Darton bringing out some slight di- 

 vergence of views on the classification of the 

 deposits, in that the discover}^ of fossils by 

 W. B. Clark had somewhat revised the ear- 

 lier stratigraphic work. 



39. Sedimentary Geology of the Baltimore Re- 

 gion. N. H. Darton, Washing-ton, D. C. 

 An account of the local geology of Meso- 



zoic and Cenozoic formations and some 

 statements regarding certain unsolved prob- 

 lems in coastal plain geology, illustrated by 

 maps and sections. The sections which 

 passed through the crystallines of the Pied- 

 mont plateau and the city of Baltimore 



