180 
The Newark System — Russell. 
Date. 
1859 
1860 
1864 
1866 
1866 
1868 
RtOne 
f Refers various por- 
j tioii of the Bystem 
I to Trias, Keuper 
[ and Jurassic 
I Between the New 
{ Red Sandstone and 
(the Oolite 
MesoEOic or New Red 
Sandstone 
Trias 
NAME USED. 
Richmond Coalfield. 
Jurassic 
Tyson, P. T 
Hall, J. and W 
E. Logan 
Daddow, S. H. 
andBannon.B 
Lyell.C 
also Triassic or h ed 
Sandstone Age \ 
1868 Triassic Period 
187J Trias 
187.^^ Triassic 
1878 Mesozoic Formation.. 
187^ Trias or New Red sand- 
stone 
1878 Triassic 
187f> Jura-Trias 
1879 Triassico-Jurassic 
1S79 Jurasso-Trassic 
1879 Amer. New Red sand- 
stone 
1879 Rhaetic or Younger 
1882 Triassic 
Older Mesozoic 
1883 Rhaetic 
1883 Triassic 
1884 Jurasso-Triassic 
I ' Lower Jurassic ] 
1884N passing downward j- 
[into Triassic J 
1885 Triassic or Mesozoic ... 
1886jTria-Jurassic 
1886TriasMC 
Cook, G. H. 
3887 Trias Emeson,B.K... 
1888|Triassic Newberry, J.S. 
Rogers, H.D. 
Marcou,J 
Agassiz, L. 
Dana, J. D 
Lyell, C 
Keir.W.C 
Heinrich, O. J. 
Dawson, J. W. 
Russel,I.C 
LeConte,J 
Dana. J. D 
Rogers, W.B.. 
Frazer, P 
Fontaine,W.M. 
Geikie,A. ... 
Fontaiue.W.M. 
Fontaine, W.M. 
Davis, W.M 
McGee, W.J 
Hotchkis,Jed... 
Lesley, J. P 
Chapin.J.H 
Hitchcock CH, 
PLACE OF PUBLICATION. 
Geol. of Pennsylvania, 4 to Vol. 2, p. 667. 
Geol. of North Am. pp. 10-13 and Map. 
Am. Assoc. Adv. Sci. Proc, Vol. 4 , p. 276. 
First Rep. on Agr. Chem., Maryland, map 
Geol. Map of Canada, [etc.] 
Coal, Iron and Oil, p. 395. 
Elera. of Geol., 6ed.,p. 451. 
Geol. of New Jersey, p. 173. 
Manual of Geol., p. 411. 
Indents' Elem. of Geol,, p. 361. 
Rep. Geol. of North Carolina, p. 116. 
Amer. Inst. Miu. Eng., Tran. v. 6, p. 227. 
Acadian Geol., 3d ed. p. 86. 
N. Y. Acad. Sci., Ann , Vol. 1, p. 220. 
Elem. of Geol., p. 439. 
Amer. Jour. Sci., [3J v. 17, p. 330. 
Macfarlane's Railway Guide, p. 180. 
Amer. Nat., v. , p. 284. 
Amer. Jour. Sci., [3] Vol. 17, p. 39. 
Monograph, No. vi 
'II 
Geol. Survey. 
Mus., Comp. Zool., Bull., Vol. 7, No. 9. 
5th Ann. Rep., U. S. Geol. Surv.,pl. 2. 
fReprintof Roger's Ann. Rep., etc. of Vir- 
ginia.] Map. 
Geol. Atlas of Pennsylvania, v. x. p. vii. 
Meriden Sci. Assoc, Proc, Vol. X, p. 23. 
Am.Ins.Min. Eng., Trans., Vol. 15, pi. op. 
p. 486. 
Gazetteer of Hampshire E. Mass.. p. 18. 
Monograph, No. xiv, U. S. Geol. Survey. 
mere litliological resemblances to rocks in distant countries 
have been used as a basis for correlation. The futility of these 
attempts is indicated by the confusion of names and of opinions 
that has arisen. Judging from the relations of this system to 
associated terranes as well as from the most recent investigations 
of its fossils, it seems evident that as a whole it may reasonably 
be correlated in a general way, with the Jurassic and Triassic 
systems of Europe. To attempt a more minute correlation at 
the present time does not seem warranted. 
The desirability of a commonly acceptable name for this sys- 
tem is sufficiently obvious, if for no other reason than conven- 
ience in discussing its relation to other terranes. The question 
is, what name shall be used? The diversity of opinion regard- 
ing its relation to European rocks renders it evident that a name 
