694 A. CC. LANE- AN DVASE. SEAVEAIN 
Calcijerous jormation—This formation appears to have been 
called by Houghton the sandy lmerock, and was said to occur at 
several points on Sailor’s Encampment Island (not Campment 
d’Ours) near West Neebish Rapids. On Foster and Whitney’s map 
of Lake Superior it was called the Calciferous, a name which it has 
since generally retained (Winchell’s map, 1865, Brooks, Pumpelly, 
and Rominger’s map 1873, and the state survey since, U. S.G.S. 
Monograph 36, 1899, etc.), and has indeed become imbedded in the 
local nomenclature of Calciferous Creek, a branch of the Au Train 
river, and Calciferous, a station on the Marquette and Southeastern 
R.R., so that it may be retained even as a geographic name. ‘Lower 
magnesian limestone”’ has from time to time been used as synonymous. 
The Hermansville limestone of the Menominee Special Folio and 
Monograph, pp. 31, 494 (Bayley, 1900-04) is this formation, or some 
part of it. It is given as not over, but near to, 100 feet thick, and 
equivalent to the Chazy and Calciferous of the east on Rominger’s 
authority. The wells along the Green Bay shore, however, show a 
fairly constant maximum thickness of about 250 feet. Here flowing 
wells reach the Lake Superior sandstone between 600 and 700 feet. 
A late record from Marinette shows, however, 75 feet of white sand- 
stone at the top which may be a trough filled by St. Peter sandstone. 
The interesting record is in brief: 
Quaternary/samd 5. * 2) 2 seme oe) een ee OOOO 
Galena and Trenton... pea 25 On 325 
Blue and brown limestones ani dolonites 
Sand at 260’, red shale at 290’ (St. Peter horizon ?) 
St. Peter- ( ?) 
White'sandstone 77 oe geste oct 23 Ae ane ceo 5 4OO 
Calciferous 
Brown dolomite. : p F : ‘ : . 60-460 
Wihitessandstone! tite) sate sie een er) arch hota Om SSO 
Dolomite (Hermansville) 4-2) ete ee es tee SOR 500 
Lake Superior sandstone 
Upper, white sandstone : ee LOS = 775 
Lower, pink, shading into fonglomern oi cherty 
quartzite, base ‘uncertatay 1.9. pes gion) aan O5 R070 
Huronian 
Cherty quartzite 2a ie) oe ees ee CS nO 70 
