_oO 
je 
TII. SEDIMENTARY ROCKS. 
N. Z. ROCKS. 115 
30. Cray SLAre Group. 
Compact fissile rocks of various colors, red, purple, 
green or black, consist chiefly of Clay (Alumina), 
other minerals are generally present as admix- 
tures; cleavage usually perfect and characteristic. 
a. Common Clay Slate. Wakatipu Lake, Otago. 
b. Roofing Slate. Wakatipu Lake, Otago. 
c, Pencil Slate. 
cl, Amygdaloidal Slate. Rolling River, Nelson. 
c2, Brecciated Slate. Wakatipu. Lake, Otago. 
d. Whetslate (Whetstone). 
Carbonaceous Clay Slate. Wakapuaka, Nelson. 
Arenaceous Clay Slate. Takaka Range, Nelson. 
Micaceous Clay Slate. Kanieri River, Hokitika. 
Calcareous Clay Slate. Aniseed Valley. 
Cherty Slate. Maitai Valley, Nelson. 
Garnetiferous Clay Slate. Kaituna River. 
Chloritic Clay Slate. McKellar Lake, Otago. 
Aphanite Slate. Wakatipu Lake, Otago. 
. Quartzose Slate. Kanieri. 
. Argillaceous Clay Slate. Wakatipu Lake, Otago. 
Pyritous Clay Slate. Wangapeka, Nelson. 
Chrastolite Clay Slate. Slate River, Nelson. 
Tremolite Clay Slate. Kanieri, Hokitika, 
Sandy Slate. Wellington. 
SSBsos Sr eVsSs ho 
31. Arcititaczous SHALE Group. 
Laminated Clay rocks where fissile texture is due to 
original stratification and not to slaty cleavage, 
in other respects similar to Slates into which they 
frequently pass. 
a. Common Shale. Waikato. 
d. Carbonaceous Shale. West Wanganui. 
e. Variegated Shale. 
jf. Arenaceous Shale. Mount Hamilton, Otago. 
g. Micaceous Shale. Mount Rochfort, Nelson, 
h. Calcareous Shale. 
