24 TRANSACTIONS OP THE [OCT. 19, 



dicates for the neighboring Hudson YalleA^ ups and downs, that 

 of course the Bronx must have shared. Dr. Merrill states that 

 after the retreat of the continental glacier from this section, the 

 land stood for a long time at a minimum depression of 80 ft. be- 

 low its present level. A gradual elevation followed to a point 

 about 180 ft. above its present position. During this elevation 

 erosion must have been especially active. Depression followed 

 of about 100 ft. bringing the Igvel down to its present position. 

 The same sinking is still slowly progressing. All these changes 

 must have afl'ected the Bronx, although they do not modify the 

 main contention set forth above regarding the diversion. 



Attention may be drawn to the rocking stone near the southern 

 border of Bronx Park, and at the spot shown on the map. It 

 is a fine specimen of its kind. It is about 10 ft. wide by 8 ft. 

 thick b}' 7-8 ft. high and may be rocked so that its North pole 

 swings through about 3 inches of arc. 



The third paper of the evening was. b}' D. H. Newland en- 

 titled " The Eclosfites of Bavaria." 



NOTES ON THE ECLOGITE OF THE BAVARIAN 

 FICHTELGEBIRGE. 



By Dayjd Hale Newland, A. B. 



The occurrence of eclogite in the Bavarian Fichtelgebirgehas 

 long been known and is described in the earl}- works on Geol- 

 ogy and Mineralogy. Haiiy determined the mineral constit- 

 uents of the rock with more or less accuracy and gave it the 

 name it now bears. But no detailed account of the geological re- 

 lations was published until v. Giimbel's " Geognostische Beschrei- 

 bung des Baierischen Fichtelgebirges " appeared in 1878. In 

 this report, the author classifies the rocks as being part of the 

 Miinchberg gneiss-group, but does not enter into an}' discussion 

 of their origin. It was with the hope that something more defi- 

 nite in this respect might be learned, that the writer spent 

 some time, during the summer of 1895, in investigating the 

 geology of the region.* While the results have not been such 

 as to warrant any decided statement, 3et a few observations 

 were made which may be of sufficient interest to deserve notice. 



The eclogite exposures form a series of hills and ridges ex- 

 tending nearly north and south from the city of Ilof to the vil- 

 lage of Markt Schorgast, a distance of about fifteen miles. They 



*The subject was suggested to the writer while a student at Heidelberg, by Prof. 

 Rosenbusch, to whom acknowledgment is made for assistance kiudly offered. 



