1. Compressional structures (patterned ground) in Devonian pedogenic limestones;Allen;Nature,1973
2. Growth of patterned ground in Victoria Land, Antarctica;Black,1973
3. Periglacial features indicative of permafrost: ice and soil wedges;Black;Quat. Res.,1976
4. Early Proterozoic weathering profile on the 2200 m.y. old Hekpoort Basalt, Pretoria Group, South Africa: preliminary results;Button,1979
5. Late Precambrian glaciation of Spitsbergen;Chumakov,1968