Association of American Geologists and Naturalists. 107 



Doctor H. King came to the conclusion, from observations 

 made in Missouri and elsewhere in the west, that no volcanic or 

 igneous agency had any influence in the segregation of the lead j 

 the subjacent beds had no dykes, dislocations, or other proofs of 

 igneous agency. The lead was imbedded in the rock, like masses 

 of chert ; had not been volatilized, and it not unfrequently was 

 the matrix of fossils. Further, the chief deposits are arranged 

 in great eastern and western lines, occasionally in plates filling 

 cracks in the rocks. 



The oral discussion of the subject was continued until the 

 hour of adjournment. 



Friday morning, May 10— The Association met at 9 o'clock 

 in the Unitarian church. Dr. Locke took the chair, and present- 

 ed to the notice of the Association, from Mr. John Vancleve, of 

 Dayton, Ohio, a translation of the first part of Dr. Goldfuss's 

 work on « Petrifactions," part " Zoophytes." 



Prof. Hitc/icoc/c gave, by request, an oral recapitulation of the . 

 points of his paper of yesterday on Trap Tufa, &c. previous to 



the reading of Mr. Silliman/ss nan^r nn the* Tran nnrl Scnrlct^no 



°f Connecticut. 



A letter of Messrs. Booth and Boye, of Philadelphia, in refer- 

 ence to the " Report on the native compounds of Lime, Magne- 

 »»> Manganese, and Iron," expected from them, was read, and 



1 Was Voted Miat they be requested to report on the same subject 

 next year. . ^ J 



r - B. Silliman, Jr. presented a "Report on the Intrusive 



caU P d° f tHe NeW Red Sandstone of Connecticut," which was 



forth by a resolution of the Association last year, and 



s confined chiefly to several theoretical considerations, found- 



°n the facts developed by Dr. Percival's able Report on the 



Th ^ Connecticut, and on others of his own observation. 



sio C ° nclusi °ns arrived at by Mr. Silliman, after a full discus- 



me subject, which occupied more than an hour, were 



We ?■ tne sedimentary strata of the valley of the Connecticut 



wh' K fr° m suspension in water in the angular position in 



sub G n ° W ^ in< ^ ^ em ' ( w ith an easterly dip,) and have suffered no 

 Pend Gnt n § e °* dip, except in immediate connexion with and de- 

 probaKi ° Q m J ect 'on of the trap rocks ; and further, it was considered 

 setti e mt se strata were deposited by a primeval oceanic current, 

 marv° r ° m tlle soutnwes t and west, bearing with it the ruins of the prU 

 7 Strata 0v *r which ft flowed. 



