THE 
AMERICAN 
JOURNAL OF SCIENCE, &c. 
GEOLOGY, MINERALOGY, &c. 
Art. I.—Memoir on the New or Variegated Senditone of the 
United States. By J. Fincn, F. B.S. M.C.S 
To advance the study of Geology, it is eraws — rocks 
or formations, possessing similar characters, should be called 
by the same name, in whatever part of the sate of the 
earth they may be found. 
n the geological map of the United States of America, a 
formation, coloured blue, extending from New-York to Vir- 
ginia, has hitherto been called old red Sandstone. _ Some 
members of it appear to me to belong to a very different 
formation—to one much higher in the Series—to- the new or 
variegated Sandstone. te 
I have examined this rock in a great variety of positions. 
but it is best displayed at the quarries, one mile N "West 
of the town of Newark, in New-Jersey, where there are ex- 
tensive excavations, which have been worked more than a 
century, and from whence New-York has been, and still is, 
supplied with large quantities of building stone. These 
quarries exhibit a nearly perpendicular section, which shows 
the following varieties. 
* Tn New-England, the old red Sandstone, so ably described by Mr. 
Mactourg, is the basis of the formation but some of the upper strata ap- 
pear to oe with he views of Mr. Finch.—Ep, 
Vo —N 27 
