Janeen PageJul 27, 20201 min14. Lake Pukaki Rock Flour Based on 'Rock glazes of NZ' Minna Bondy Sample 79. Pukaki River Sand Almost certainly derived from Greywacke and possibly schist. Much...
Janeen PageJul 25, 20201 min13. Ahuriri River sandBased on 'Rock glazes of NZ' Minna Bondy Sample 90. Sand near Omarama Considerable quartz, rather weathered feldspar, sericite,...
Janeen PageJul 24, 20201 min12. Waitaki River SandBased on 'Rock glazes of NZ' Minna Bondy Sample 75. Waitaki River Sand (Schist in Otago is largely derived from greywacke and their bulk...
Janeen PageJul 24, 20202 min11. Blackhead BasaltBased on 'Rock glazes of NZ' Minna Bondy Sample 54. Basalt A hard dark fine-grained rock consisting essentially of lime-soda feldspar,...