176 Association of American Geologists. 



actions would be supplied by a floating iceberg, whose lower 

 surface should present projecting sharp points of imbedded bowl- 

 ders. 



Prof. Mather further stated, that the bowlders of Ohio were 

 in continuous lines and groups, and not scattered promiscuously. 

 On the river St. Peter's, the bowlders may be seen extending for 

 miles, as along a coast line ; in some situations one might see 

 them bounding the horizon as far as the eye could reach. 



Dr. Locke, in conformity with Lt. Mather's statements, men- 

 tioned a region of bowlders in Ohio, extending from the town of 

 Eaton quite across the state ; five miles in width and over forty 

 in extent. 



Dr. C. T. Jackson remarked, that the phenomena of diluvial 

 currents were well exhibited in the vicinity of Providence, at 

 Cumberland, R. I. A large mass or mountain of porphyritic 

 titaniferous iron of very peculiar character exists in that place ; 

 to the north of it no bowlders are to be found, but on the south, 

 huge bowlders of it may be seen, and so abundant that the stone 

 "walls are built of them ; and below, at Papoose Squash Neck, small 

 bowlders of the same characteristic rock are found ; south of New- 

 port, and still further south, the same are met with of a smaller 

 size, the whole extending from north to south forty miles, and 

 from six to fifteen in width, diverging to the south. 



The characteristic made rock at Lancaster, Mass., presents sim- 

 ilar phenomena, being found in loose masses to the south as far 

 as Bolton, while none can be found to the north of the locality. 



He considered the power of the diluvial currrent greater to the 

 north than at the south, since the evidences of it in Maine are 

 much greater than in Rhode Island ; bowlders have been found 

 on Mount Katadin as high up as four thousand feet ; he thought 

 there was no evidence of any elevation of the rocks after the di- 

 luvial current had passed. 



Mr. Nicollet proposed, at a future meeting, to make some re- 

 marks upon, and to exhibit specimens from, the cretaceous for- 

 mation on the upper Missouri. 



Mr. Redfield expressed a wish that the attention of the Asso- 

 ciation should, at some convenient time, be called to the recent 

 sand formation along the eastern coast of the United States. 



Adjourned to meet this afternoon at 4 o'clock, at the rooms of 

 Mr. Richard C. Taylor^ for the purpose of viewing a model of 



