a 
ROCK CLASSIFICATION ON THREE CO-ORDIN- 
PMA during th 
Wath? SOM either in Ms 
iTES 209 
hor> Bier pesos a Biba b nathan ent of 
PARAL TRE co 
"1 te haye . very 
ary 
Tocssiea deel by 
ments 
a aut OES i form, 
geologists in some Me. toftentt local PHBA Im of its et 
ased Yppn t 
ieee 
baile’ ns ¢ 
erst eee Ae. Seal 
Vat I 
Jd and nieaiecow dives 3: maehinee 
is algo bag@AthwsA the geo 
i the in wi 4) 
inynq3z0d | 
ebeatised ae 
Bi ii (RESETS a hon. $c ti at the 
sition, 
It 
mre 
rock of batholiths are |se parated | om im those of bitiace Hoes and 
ovdA arin ‘A f oo 
bptt are separated fro @iex4 iki : an wills. | Ros osenimiech has 
ony put this classification into Ga ar sje et ane iis fact 
hes ided him in 1 adapt ney it & dea ancingsknowle an «nabled 
no! 2 ses di — actors 
/ 
| PLE baa ye : | Pecind 
g. It is surprising that evel ae lakeeedem) Rpsenbuseh still 
reco nizes geological age as a Basigol clas Ficationgh so omie groups. 
He also emphasizes the importgi gs incti®n bety§ én alkaline and 
other rocks. | a rs | 
In spite of its relative inflex bility a|diagr ammati ic or tibular 
scheme oa , has-nur 1: ate int waeeg 0 o Whe as for 
ATIITAL, 7 -9tilsi10 
example, Kemp’ s* greatly i: agli mor qavAgrag 0! the 1 Rose. busch 
cBssification owes much of its popula ‘ity... Such@al oe ~ 1emes 
= i i | cgay 6 
have heretofore been arranged on-$wo co+@dinates| | The reiation- 
eee be ate jig! coshapiosia| that ogo! the 
chief defects of diagra meiie es hasebeen thpt the - ought 
out so few of these affinitie sa [Bay the uge of trfnspares _ paper 
such) a classification may be Grist ted @m three do-ordimates as 
shown on the triple ingert, af the advantages of such a scheme 
oBtained without the dbfect mentioned. A classification om three 
cGordinatesiddgea not sho¥4 Pr atignidps that exietasbut it 
eghibits many more Tr Uae YF Ue oe vent, it) 1S 
believed that no more can be Bho ae lout “h ing the edvan- 
tages of the tabular snd |} 
The classification giv en here with | E $d 1 jars gdly upor that of 
Rosmbusch—but—it-tiffers- from fre ah in various Pm yrtant 
py 82774 é 
respects, so Heel responsibiMien 2%"? mreee stent he 
e. he first co-ordinate is in the (ive tion norm: nie 16 Paper, ie 
5 «Handbook of Rocks. 1996. | | = 
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