Figz Horn blencle-gabbro fiom Ashland County, Pris. Fig.2 Hornhblende gabbro from Ashland County, Mes. 
Ordinary laght. Scale diameters Ordinary lyht Scale 2¢ drametert 
Labradorite(1/; orthoclase(2); augrte (x) largely alleren O%goclase/z) | orthoclase/2), brown hornblende(s), ura live 
torerrdzle and uralrte, brown hornblende (4), tctancef- (#), altered from drallage ih se: leniferows magnetite (S) ; 
erous magnetile(s/, apatites), guartazlb/; apatrtelz), 
GZZ 
: 
oe 
; Ar ‘ 4 ; 
Fe9.3 Hornhlende -gabhro from English Lake Hrs. Fig. 4 Anorthite rock from north shore of Lake Super- 
Ordinary leght. Scale 29 crameters tor, Sec.s, Li st, Re Minn. Polarizec LipAt, 
Hornbiendel1 mith cores of augrte(2),; labradorite (g/ Seale /7 diameters 
magnetite (as. Made up wholly of anorthite enderiduads 
