Some ochre pieces from Rose Cottage Cave showing rubbing use-traces. Tammy Hodgskiss Lyn Wadley 10.1371/journal.pone.0176317.g007 https://plos.figshare.com/articles/figure/Some_ochre_pieces_from_Rose_Cottage_Cave_showing_rubbing_use-traces_/4916045 <p>A. Smoothing and metallic lustre, containing external microstriations, on the high ridges on a piece of shale (RCC-H-089 from HP layer SUZ, square Hg). B. Flat surface with rounded edges of a piece of silty, mica-rich shale (RCC-H-263 from post-HP layer JEN, square Ih-Hh).</p> 2017-04-26 17:42:59 pre-Howiesons Poort layers skin protection Rose Cottage surface modifications silty grain sizes sediment volume processing techniques post-Howiesons Poort layers Rubbing transfers utilization rate skin colouring Howiesons Poort layers Rose Cottage Cave piece Middle Stone Age MSA grain size