154 Scientific Intelligence. 
IL. IN FAVOR OF THE IDENTITY OF THE TACONIC SYSTEM WITH PART OR ALL OF 
HE New York Lower Siturian. (The Lower Silurian is called Champlain 
Division by Mather). 
H, D oie . B. Rogers: Proe Amer. Phil. Soc., Jan. 1, 1841; make the slates 
of the nic Mountains wat the sh east and west to be Lower Silurian, and 
refer ine tol to the Hudson River group.—W. W. pone ag Report Geol. N. 
, 1843; gives many sections and announces the same conclusions, argu- 
ing agai inst the Taconic system.—H. D. Roaurs: Address, etc., Rep. Amer. Assoc. 
Geol. & Nat., for 1844, p. 67, and range J. Sei., xlvii, 137, 1844; urges the same 
views essentially. —Jamus HALL bid., 
T. S. Hunt, “of the Cheotoigisad Coietinos of Canada:” On the Taconic Sys- 
tem, Report pogo eiate aga 1850 hee Haven meeting) says, “The results of 
the [C anada] surv hown, as I had the honor ~ _ at the last annual 
meeting at Cambridge [ia 1849} that the Green Mountain rocks are nothing else 
than the rocks of the Hudson River group with the eewaneat nk or Ue ore 
in a metamorphic condition. i“ iy 6g ALL: N. Y. Paleontology, vi p. 
1859.—T. 8. Hunt: Amer. J. “, xxxi, 402, 1861 (after jee 8 ‘defining ot 
the rhein group) ; says, a oe eee group with its bomen shales is no 
other than the Taconic system of Emmons.”—Inrm: ibid., xxxii, 427, 1861; makes 
the Tasers exclusive of the slates, equivalent of the Duties: addi ng that “it 
remains to be seen whether Dr. Emmons can retain from the wreck of his system, 
otsdam.”— W. : 
eg part at least, of = strata of the Potsdam and Quebec Group.” —J. 
Dana: Manual of Geol y, 18055 pee ee adopts the wont just mentioned.— 
James HALL and E fein : Am Sei Mee 96, 1865; refer the 
Hudson River roar south of Albany - the “Onahen grou —T.S. Hunt: Address, 
etc, Rep. Amer. Assoc., for 1871; rs the Stockbridge or Green Mountain 
limestone to the Quebec group, an Sole that the conclusion of Rogers and 
a 
: ia = oe Rocks of the vicinity of Great Barrington, r J. 
Sci., III, iv, vi, 1872, 1873; gives sections showing the confor mail of "the 
Taconic slates, . > agi schi sts” (slates and schists making the conic Moun- 
tains), 8 f Emmons), 
and malkos the Hmostone (on the basis of Billings’s 8 report of tap 8 _Aiscoveris) 
wo and Chazy, and the aa ee and slates of Hudson age.— 
: Discoveries fay Verm , ibid., 1877 1; Shows, by their fos sil, that is 
limes tone’ ORT the T: 
in Verm ont, are Lower Sifurian, “from Potsdam to bors inclusive, and that 
Taconic slates overlie the limestones—J. D. Dana: On the Re ire — of ie 
Geology of Vermont to that of Berkshire, sot aie: 1877; give sec 
proving the conformablity before ann ounced, a sustains the comehison | rg the 
ni 
age, and the sored Lower Silurian, and shows also that mica schist, gneiss 
i mtg 
ae DERICK oe Ps RIME, JR. sils i sto 
with \ Hydromia Slates in ote psa Shyer ibid., xv, "61, 1878; shows the 
r Trenton age of the rocks, w ve par t of the so-called Taconic, — 
ire like thitian of Berkshire. a N euson Dat P Discovery of a proving ti 
‘udson River age of the supposed Taco eepsie slates. At 
he Hudson River Age of the Taconic sorindy ia. , Xvil, 375, 1879; announces 
liscovery of Trenton fossils in the Barnegat or Wa pinger alley “jimestone 
Z ay ps 
i oe FIELD : @ occurrence of rea of the Lazy erg ' the 
Barnegat Limestone near Newburgh, New York ibid., xviii, 227, 1879.—W. 
B. Dwieut: On Calciferous as well as Trenton fossils in the Barnegat lime- 
