270 



H. S. Summer, 



14 15 16 17 18 19 20 21 22 23 



? 



f- 



A 



-D/JCITi: CHCROKELS. 



- -SMCITE niLLIMICONCONG CD. 

 = \DflCITE BRflEMflR HCUSL. 

 _ ^DflCIT£ UPWCy. 



„ ^CRmod/OR/ T[ BRfl^MflR. 



^BfiCITE. HfSKE T. 

 '' r/lMMELL/TC BROflDMEfldOWS: 

 T URmaS/OR/TE HESKE J. 



- Irnn/7,'^EL LITE S JRfl THBOGli S 

 ~ jrM of m ona Q p. STRflTHHCGlES 

 Zjr&RmOHIOR/TE HfiRCOURT. 

 -■L-QUflRTZrCPPH. STR/STHSCCIES. 

 --^ffmMEUITE INGLISTON. 



1 ^-GRmmoRiTE roRPH b/irringo cr 



J^GRflNITE G ABO IS 

 _ \iR/INITE M^ BUFFALO 



rGRfLNITE GEELONG 

 iJ^CRPNITE CriPE WOOL f] Mm 



dBCITE ChERCKEES. 

 dflCITE WILLmiGONCCNG C/f 

 mClTE BRREI^RR HOUSE 

 'ft CITE UPWEY. 

 ^.^GRRNCDIORIJE BRflEMflR 

 ^^MCITE HESKET 



■flDflMELLlTE BROffBMEffSOWS 

 ■RmODlbRITE HESKET. 

 'D/fMELLITE STRFITHBDGIES 

 flV. 0/ m anaQ.P S TRflTH BOGIES. 

 JUrGRflNODIORITE HRRCOURT. 

 -^QUfLRT2 PCRPH. STRffTH BOGIES. 



■ffDRMELLITE INGLISTON 

 ^^GRftNOmORI TE PORPH. BflRRINGO CR. 

 ^^GR.^NITE G/1B0 IS. 



^GRRNITE M''- BUFFALO. 



rCRffNITE GEE LONG. 

 -■i-Gh 



GRANITE CAPE WOOLRN!AI. 



Fig. 3. 



A variation diagram has been plotted from these recalculated 

 analyses, and is given in Fig. .3. It will be seen that the variation 

 is of linear type, and that on the whole the various points 

 conform very closely to the graphs. The adamellite from Broad- 

 meadows shows a positive departure in the alumina, and an equal 

 negative departure in the magnesia, while the remaining oxides 

 ■conform remarkably well. The two rocks from the Strathbogies 

 show decided departures in some cases, but the mean of these two 

 analyses gives points which fall close to the lines. The Harcourt 

 granodiorite shows little departure except in the soda. The four 

 granites conform remarkably well to the graphs. 



