112 • PETROLOGY: CLARKE AND WASHINGTON Proc. N. A. S. 
tn 
O 
o 
O 
n CO 
"O 1 
COC^t^l>'-t^-.~^. 
(MOotOiOiOiOiOCOOlrHOOOOOOfMOOOOO 
O O O Q O O 
o o o o o o 
05C3cOOt>OI>Gi:OfO!rit^OG50CCir-(CO'-HCO(MO 
(MOoito^iOTt^cq-^r-iT-tOOOr-iOOT-ioOOi-i 
J>oot>T^^coc<^c<^{^^ocoooooooooooo 
^ ot^OiTt^cD^ooO(^^ 
i-HOOoooO'--^coooa5cquo(>jc^oioococo>OLOTt^cocococQ'--ioooo 
Tt<iOooc000i0Ol>'-''-t'-iOOOOOOOOOOOOOOOO 
'THrHOOOlO^COfMrHi-l 
o 
COt-OOiOCO(N(MC^OOOOOOOOOOOOOOOOOOOOOO 
c 
§ n.S 
lll§^l 
6 : p 
^ e § 
C(3 t;) 
O y 
;=! 
8 
o 
o 
o 
Locoi^ooaiO'-HC<ico^Loot^ooaiO'-HC<ico'*io<:ot>ooo50 
r-^T-^rH^,-^^^rH,-^^(^qc^l(^^c^^<^^(^^cQc^q(^^(^qco 
S3 
o 
pop 
>-i 
22 s« c« 
S =2 S 
q o o 
^oaioioooc^oi^cOTjiiCLOtMooo 
(^qr^looooiOOTt^co»oOlOcoo5^co»o<^^^0(^^<^qc<^lO(^qQ'-^oo 
r-HC0O00-^O00i-Hr-i,-iOO(MOOOOOOi-HOOOOOOO 
oilOCOCOCOiOCOCOrHOT-HOOOOOodoOOOOOOOO 
oT^dnOOoq^ ^ 
