Extended Data Fig. 3: Horizontal distribution density maps (1) and angular histograms and stereographic projections (2) of lithics and fossils from the T69 Complex bone tool horizon.
From: Systematic bone tool production at 1.5 million years ago
1) Observed Mean Distance (OMD) and Expected Mean Distance (EMD) are expressed in metres. P-values of complete, lithic and bone assemblages = 0.000. P-value of bone tool distribution = 0.6785. 2) Orientation of items with elongation index >1.660 calculated as azimuthal (a) and axial data (b). c, Stereographic projection of azimuth and dip values. d, Vollmer’s trivariate fabric shape triangle99. e, Benn’s fabric shape triangle100.
