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. 2017 Apr 26;12(4):e0176317. doi: 10.1371/journal.pone.0176317

Table 2. Recorded physical properties of Rose Cottage Cave ochre and their identifying features.

Ochre attributes Identifying features
Geological type Shale, mudstone, siltstone, sandstone, snuffbox shale, iron oxide, other
Brilliance Mica inclusions present or absent
Grain size Texture: clayey, clayey/silty, silty, silty/sandy or sandy
Hardness Soft (Mohs Scale 1 and 2), medium (Mohs 3 and 4) and hard (Mohs 5 and above)
Colour Munsell colour readings on streaks. Colour groupings are made with a polythetic divisive classificatory program [81]