The Neivark System — Russell. 
179 
opinions of various oreologists respecting their European equiva- 
lents, are briefly designated: 
The rocks referred to in the table are a unit in American 
geology and form a well defined system which is limited above 
and below by great unconformities. Fossils occur in abundance 
at certain localities but as yet have not been found at enough 
horizons in the various areas to establish subordinate divisions. 
This has been attempted, however, and not only have numerous 
subdivisions been proposed but various fossiliferous layers have 
been correlated on the strength, in some instances, of a very 
few fossils, with various terranes in Europe. At other times 
Names and correlations applied to the whole or portions of the 
Newark System. 
Date 
NAME USED. 
AUTHOR. 
PLACE OF PUBLICATION. 
;817 
Old Red Sandstone.... 
Maclure, W 
Am. Philo. Soc. Phila., Trans. Vol.1, n. 
8, p. 20, and map. 
1820 
Old Red Sandstone.... 
Nuttall, F 
Acad. Nat. Sci., Phila., Jour. Vol 2, p. 37 
18:^2 
Old Red Sandstone and 
Coal formation 
Hitchcock, E... 
Am. Jour. Sci. [1] Vol.6, pi. op. 8G. 
1824 
freestone and Coal 
turmation o£ Orange 
and Chatham (N.C.J 
Olmsted, D 
Rep. Geol. North Carolina, p. 12. 
1 8:^;^ 
New Red Sandstone.... 
Hitchcock, B.... 
Rep. Geol. Massachusetts, p 206. 
1835 
Carboniferous . ... 
Taylor, R.C 
Redfield, J.H... 
Geol. Soc. Pa. Trans.. Vol. 1, p. 294. 
1836 
Lia."* [?] 
Lye. Nat. Hist. N. Y.. Ann. Vol 41. 
1»39 
Middle Secondary 
Strata 
Rogers. H.D.... 
Third Annual Rep. Geol. Pa., p. 12. 
1839 
Middle Secondary 
Strata 
Rogers, W.B. .. 
Geol. of Virginia, p. 74. 
1842 
Secondary Formation 
Pe.civai.T.G... 
R p Geol. Couneciicnt. 
1842 
Keuper 
Rogers, W. B.... 
Amer. Jour Sci [I] Vol. 43, p. 175. 
1843 
New Red Sandstone.... 
Mather, W. W. 
Rep. Geol. of New York, part iv, p 293. 
1843 
Old Red Sandstone and 
Coal Measures 
Cozzens.I 
Geol. Hist, of Manhattan, p. 43. 
1 843 
Oolite 
Rogers, W.B ... 
Amer. Assoc. Geol. Nai., Trana., p. 298. 
1844 
New Red Sandstone.... 
?:iliiman,B 
" " " Proc, pp. 14, 15. 
1847 
Triassic or Jurassic .... 
BunsbnryC.J.F 
Quar. Jour. Geol. Soc. .Lond.,v.3,p.288. 
1«47 
Permian or Tria.ssic.... 
Inferior Oolite? 
Lyell, C 
..•..'.." .^75 
1847 
Lyell,C 
" .' '• 278-280 
1840lKeuper orLias 
Marcon, J. — 
Geol. Soc. France. Bull., Vo'. 6. p. 575. 
1850 
Si.urian 
Jackson, C.T... 
Am. Jour. Sci. [l] Vol. 3, p. 335. 
18.51 
New Red Sandstone.... 
Agassiz,L 
Am. Assoc. Adv. Sci., Proc, Vol. 5. p. 46. 
18.51 
Post Permian 
Redfield, W.C... 
" " ' ' p. 45. 
18,53 
New Red Sandstone or 
Keuper 
Marcon, J 
Geol. Map of North America. 
1 8.54 
Jurassic 
Rogers, W.B.... 
Boston Soc. Nat. Hist. Proc. v. 5. p. 14. 
1855 
Near the Lias of Eu 
1 rope 
Jackson. C.T... . 
Am. Jour. Sci [1] Vol. 5, p. 186. 
1 850 
Trias or New Red 
Sandstone 
Ritchcock.E.... 
Outlines of Geol. of the Globe, p. 96. 
18.5fi 
Oolitic 
Hitchcock, E.... 
Map. 
18.50 
Newark Group 
Redfield, W.C... 
Am. Jour. Sci. [1] Vol. 22, p. 357. 
1856 
Triassic and Jurassic... 
r)ana,J.D 
p. 357, 
185 
Trias and Permian .... 
Kmraous, E 
Geol. Rep. North Tarolina, p. 27.J. 
1856 
Jurassic 
Rogers, H.D.... 
Geol. Mapof L'. S., Johnson's Phys.Atlas. 
18.57 
Keuper 
Heer, 
Geol. of Nottb Am. by J. Marcou, p. 16. 
1857 
■ihatham Series 
Emmons, E 
Am. Geol., Pt. vi. p. 19. 
1857 
Keuper 
Lyell. C 
Cited by J. Marcou .uGeol. of N. Am. p. 16 
18.58 
tiias 
Agassiz.L 
•• " p.15 
1 8.58 
Mesozoic Red Sand- 
