SS North American Eastern Tertiary — Meyer. 
at years ago by Emmons, Kanande and Marcou. Only in re- 
gard to Emmons he pretends that "it was -a fortunate hapfen- 
ing ;'''' as to Barrande he was, according to Walcott, misled in 
crediting Dr. Emmons; and as to Marcou, Mr. Walcott passes 
silently over him. 
Here is a tabular view showing the opinions and classifica- 
tions of Messrs. Walcott and Marcou in the Taconic area ex- 
tending from Tappan sea to Montmorency Falls. 
MR. WALCOTT. 
Nos, 4 and 6— Hudson ") Lower Silurian, or 
No, 3 — Trenton-Chazy-Calciferous / Ordovician system. 
Lower Calciferous I ,r n k • 
No, 2-Potsdam, " off shore deposits " J upper camDrian. 
Nos. 5 and 1 — Georgia and "granular quartz" formations of \ Upper part of the 
Vermont f Middle Cambrian. 
MR. MARCOU. 
Lorraine &hales ) 
Utica slates z-n „, i ■ 
Trenton limestone „ Champlam or 
Chazy limestone Cambrian system. 
Calciferous sandstone I 
Potsdam sanrlstonp /Upper Potsdam of Saratoga 
Fotsaam san<lstone... ^^^^^^ Potsdam of Keeseville 
Swanton slates and shales of Citadel Hill, Quebec. The Nos. 6 and 
4 of Mr. AValcott 
Phillipsbui^h and Pointe Levis formation. The No. 3 of Mr. Wal- 
cott, and also his No. 2 " off-shore deposits" 
Upper Taconic 
system. 
I Georgia slates. The No. 5 of Mr. Walcott ) Upper part of the 
Georgia formation; St. Albans or granular quartz. The No. 1 of!- Middle 
( Mr. Walcott ) Taconic system. 
SOME REMARKS ON THE PRESENT STATE OF OUR 
KNOWLEDGE OF THE NORTH AMERICAN EASTERN 
TERTIARY. 
BY OTTO MEYER, PH. D. 
The marine Tertiary of the eastern part of the United States 
is extensively developed in all the states along the coast from 
New York to Texas. Along the Mississippi valley it pene- 
trates deeply into the continent, reaching into the states of Ar- 
kansas, Tennessee and Kentucky. It thus covers a large area 
and is altogether one of the most extended tracts of marine 
Tertiary on the earth, in comparison with which the famous 
