336 T. G. TAYLOR AND D, MAWSON. 
Order of Consolidation. 
Apatite 
Ilmenite 
Felspar 
Augite | Calcite, serpentine, kaolin, 
| chlorite, leucoxene-(secondary) 
Name.—The rock is allied to essexite. The latter is a 
variety of dolerite originally found near New York, which 
according to Rosenbusch is composed as follows :— 
Labradorite or andesite. Orthoclase. Brown augite, 
with some biotite and hornblende. Olivine or its 
decomposition products. Apatite. Titaniferous 
iron. Analcime (in interstices of felspar). 
Hence we see the resemblance is very strong. It may 
be called an ILMENITE ESSEXITE. 
Hssexites resembling the above may be found between 
Chant’s Farm and Mount Jellore. The small cone just to 
the north of Chant’s Farm affords a fine micro-section of 
decomposed essexite. The felspars are mainly replaced by 
chloritic material, but large apatites and beautiful leucox- 
enes, the latter after titaniferous magnetite, make the slide 
well worthy of manufacture. gq 
No. 7. Locality 1 mile south of Mittagong Station. 
Texture—Porphyritic, with large olivine phenocrysts. 
Fabric—Hypautomorphic prismatic. Base consists of 
small laths of plagioclase mingled with grains of augite 
and magnetite, the whole enclosed ina dark brown 
glass. 
Mineral present (approximate area)— 
Classi’ Ge Re ie: B: by wae) 40% 
Olivine... ne cide gd x sieh) BOR 
Felspar ... ss wae Be sae 10, ph oe 
Augite ... \ 15% 
Magnetite eee oce ece eee | 
