165 



Cape Greg is a sheer spur at the extremity of a penin- 

 sula, situated about midway up tlie east coast of Liverpool Land. 

 A short landing was made here; but, already by reason of the 

 sheerness of the cliff, it was impossible for me to penetrate 

 inland. Vegetation was very scanty; hence the variation in 

 colour at the base of the rock, from red to dark green and 

 white, was remarkable from a distance. The main rock seems 

 to be a medium-grained, ruddy or green gneiss, which in the 

 samples examined proved to have a fairly granitic appearance : 

 large felspar individuals (perthite or microcline) show sharp 

 outlines with indications of crystalline form, and it is only in 

 the fine-grained intervening mass that the re-crystallization has 

 gone further on. Here the individuals often very actively invade 

 one another with their laciniated border-lines, and numerous 

 individuals of beautiful "myrmekite" are to be seen. The rock 

 has been subjected to pressure, and at times one could almost 

 speak of a "mortar-slruclure". 



In this rock lie large and small lumps and lenses of a 

 dark biotite-hornblende-rock, with some garnet, microscopically 

 developed as a typical amphibolite. The lenses are sometimes 

 drawn ont into long, plicated bands, in which the rock often 

 runs into a fine, pure biotite schist. 



Interspersed among both the rocks just described we find, 

 following the strike of the schists, numerous layers or dikes 

 of light, often ruddy pegmatite, now quartziferous, now almost 

 free from quartz and then composed almost exclusively of per- 

 thitic felspar and large areas of biotite. Pegmatite rocks with 

 large hornblende individuals also occur. I did not see any 

 typical granites here, but do not doubt that the rocks described 

 are composed of injected, strongly metamorphosed eruptives. 



collected a series of rocks from Murray 1. They are formed of horn- 

 blende gneiss, diorite schists and pegmatite, and thus seem to resemble 

 those at Cape Greg. 



