TUP 



AMERICAX 

 JOURNAL OF SCIENCE, &c. 



— — CK>c;;v- — 



GEOLOGY, MINERALOGY, TOPOGRAPHY, 4-c. 



Art. I. Hints on some of the Outlines of Geological Ar- 

 rangement, with particular Reference to the Si/stem of 

 Werner, in a letter to the Editor, from William Mac- 

 lure, Esq. dated Paris, 22c? August, 1818. 



INTRODITCTORT REMARKS. 



I^OME years since, during Mr. Maclure's geological surrey 

 of the United States, the editor had the pleasure of passing a 

 few days, in company with that gentleman, in exploring the 

 geology of the vicinity of New-Haven. Near that town, junc- 

 tions, on an extensive scale, between widely different forma- 

 tions, are to be observed. A radius often miles, with New- 

 Haven for a centre, will describe a circle within which the 

 geological student may find (with the exception of formations, 

 unquestionably volcanic) most of the important rocks of the 

 globe, and a radius of even six or seven miles will include the 

 greater number of these. At, and near the terminations of the 

 primitive ranges, there are rocks which appear to have, in a 

 high degree, the characters of the transition class. Among 

 them is the beautiful green marble of the Milford Hills, seven 

 miles from New-Haven. Mr. Maclure visited that district. 

 Vol. I... .No. 3. 18 



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