Leslie Adkin,
1911, 9-17 February, "Tararua coal." Specimens of slickensided carbonaceous slatey shale or argillite on pinched-out cores of greywacke and vein quartz. The high polish is due to shear under immense pressure during intense folding of the oldest deformation of these rocks., Gelatin glass negative,
Museum of New Zealand - Te Papa Tongarewa,
LL/127595