THE 
AMERICAN 
JOURNAL OF SCIENCE, &c. 
represen 
MINERALOGY AND GEOLOGY. 
BBM 
Ant.I. Remarks on the Geology and Mineralogy of a Seé- 
tion of Massachusetts on Connecticut River, with a part of 
New-Hampshire and Vermont ; by Epwanv Hrroncock, 
A. M. Principal of Deerfield Academy. 
HE geology of this tract, from a few miles south of North- 
ampton in Massachusetts to the north boundary of Brattle- 
borough in Vermont, and of Chesterfield in New-Hanpshire, 
's shown on the subjoined map.* The primitive formation, 
“xcept the argillite, is coloured vermillion; the secondary, 
blue; and the alluvial gamboge yellow, according to Cleave- 
land. The alluvial part is elevated above the bed of Connecti- 
cut river, from 10 to 100 feet, and, in most places, reposes on 
red Sandstone. The soil, in the northern part, is generally ar- 
gillaceous; but in the southern, more siliceous. The secon- 
dary formation consists chiefly of detached eminences that 
"se abruptly from the plain, and are composed of red sand- 
stone and puddingstone alternating, except the elevations A 
and B, (Holyoke and Tom,) and a part of the range CD, pass- 
ing through Deerfield and Greenfield, which are greenstone. 
© part coloured rose-red consists of argillite, sometimes 
Brel iblished in thi 1 (Vole VI. p. 1a 
more extende, d cheock has published in this Journa (Vol. . 
Mirleerd edition of the present number the comparatively imperfect map 
in the first and second editions. . July, 1827 ss 
