Their word for red ochre means clay mixed with blood. . New Guinea, Borneo and Taiwan, with Eskimos from Greenland to Siberia, and among the Haida in British Columbia. Beyond these, dating rock art may be relative or absolute.
English (pdf); English (epdf) · Article in xml format; Article references; How to cite this Dating minerals by ID-TIMS geochronology at times of in situ analysis: selected case . Most of the rock-forming minerals have very low U and Th contents.