362 SUPPLEMENT TO DESCRIPTIONS OF SPECIES. 
MICHIGAN. 
BREsT (Monroe Co.).—Cailcite, amethystine quartz, apatite, celestite. 
GRAND RapPips.—Selenite, fib. and granular gypsum, calcite, dolomite, 
anhydrite. 
LAKE SUPERIOR MIninc REGIoNn.—The four principal regions are 
Keweenaw Point, Isle Royale, the Ontonagon, and Portage Lake. 
The mines of Keweenaw Point are along two ranges of elevation, one 
known as the Greenstone Range, and the other as the Southern or 
Bohemian Range (Whitney). The copper occurs in the trap or amyg- 
daloid, and in the associated conglomerate. Nutive copper! native 
silver! chalcopyrite, horn silver, tetrahedrite, manganese ores, epi- 
dote, prehnite, awmontite, datolite, heulandite, crthoclase, analcite, cha- 
bazite, compact datolite, chrysocolla, mesvtype (Copper Falls mine), 
leonhardite (ib.), analeite (ib.), apophyllite (at Cliff mine), wollastonite 
(ib.), calcite, guurtz (in crystals at Minnesota mine), compact datolite, 
orthoclase (Superior mine), saponitc, melaconite (near Copper Harbor, 
but exhausted), chrysocolla; on Chocolate River, galenite and sul- 
phide of copper; chalcopyrite and native copper at Presq’Isle ; at 
Albion mine, domeykite ; at Prince Vein, bite, culcite amethyst ; at 
Albany and Boston mine, Portage Lake, prehnitc, analcite, orthoclase, 
cuprite ; at Sheldon location, domeykite, whitneyite, algodunite ; Quincy 
mine, calcite, compact datolite. At the Spur Mountain iron mine 
(magnetite), chlorite pseudomorph after garnet ; Isle Royale, datolite, 
rehnite. 
MARQUETTE.—Manganite, galenite ; twelve miles west at Jackson 
Mt., and other mines, hematite, limonite, gothite/ magnetite, jasper. 
Monroe.—Aragonite, apatite. 
POINT AUX PEAUX (Monroe Co.)-—-Amethystine quartz, apatite, celes- 
tite, calcite. 
Sacinaw Bay.—-At Alabaster, gypsum. 
Stony Point (Monroe Co.)--Apatite, amethystine quartz, cclestite, 
calcite. 
ILLINOIS. 
GALLATIN Co., on a branch of Grand Pierre Creek, sixteen to thirty 
miles from Shawncetown, down the Ohio, and from half to eight 
miles from this river.— Violet fluorite! in carboniferous limestone, 
barite, galenite, blende, brown iron ore. 
Hancock Co.—At Warsaw, quartz geodes containing calcite! chal- 
cedony, dolomite, blende/ brown spar, pyrite, aragonite, gypsum, bitu- 
men. 
HARDIN Co.—Near Rosiclare, calcite, galenite. blende ; five miles 
back from Elizabethtown, bog iron; one mile north of the river, be- 
tween Elizabethtown and Rosiclare, nitre. 
Jo Davigss Co.—At Galena, galenite, calcite, pyrite, blende; at Mars- 
den’s diggings, galenite / blende,.cerussite, marcasite in stalactitic forms, 
pyrite. 
Joui1eT.—Marble. 
Quinoy.— Calcite! pyrite. 
ScALusS MounD.—Buarite, pyrite. 
