White limestones of Sussex Co., N. J. — Nason. 243 
of New Jersey, " Philadelphia, 1836. Whether, during the four 
teen years which elapsed between the publication of the paper just 
quoted and this report of Prof. Rogers, this question was can- 
vassed and the drift of scientific opinion set in favor of Prof. 
Rogers, I cannot say. Certain it is, however, that Prof. Rogers 
in this report calmly takes his position for granted and describes 
all of these limestones under the name of Formation II. There 
are numerous papers in the earlier volumes of the American 
Journal of Science, by Nutall, Pierce, Shepard and others, and 
these men seem to favor Prof. Rogers. 
In these papers, the region under discussion is referred to as 
the "transition series." No special mention is made of the white 
limestones but they appear to be included in the same category as 
the rocks of the Green pond, Bearford, and Bellevale mountains, 
and the blue limestones of the N. W. border. 
Prof. Mather, as will be shown later on, seems to adopt this 
view, but ascribes to Thomas Nutall the credit of first expressing 
the opinion that the blue limestones and the white limestones are 
cotemporaneous in origin. 
In the American Journal of Science, vol. v., pp. 247-248, 
Nutall describes the rocks near Fowler's house at Franklin as 
follows : 
" The crystalline calcareous rock which alternates with granit- 
ines of feldspar and quartz, or with beds of sienite granite, dis- 
appears, and a confluent grauwacke, almost perplyritic, and 
cotemporaneous apparently with the other formations, appears 
directly overlaid by a bed of leaden, minutely granular, secondary 
limestone, containing organic remains of the usual shells and cor- 
alines, and layers of blackish hornstone or petrosilex. Tins rock, 
as well as the grauwacke beneath, presents disseminated crystals of 
bine fluate of lime. In the limestone the cavities are sometimes 
very numerous, and lined both with pseudomorphous masses and 
cubes of blue and white fluate and quartz crystals. 
"Thus we have, " continues the writer, " here before us, as at 
lake Champlain, the novel and interesting spectacle of a union 
of every class of rocks, but passing decidedly into each other as 
if almost cotemporaneous " ! 
Nutall's position is thus clearly defined though he makes the 
usual mistake of supposing the so-called sienite to be of sedimen- 
tary origin. 
