RT Journal Article SR Electronic T1 Society meetings September–December 1979 JF Journal of the Geological Society JO Journal of the Geological Society FD Geological Society of London SP 511 OP 515 DO 10.1144/gsjgs.136.4.0511 VO 136 IS 4 YR 1979 UL http://jgs.lyellcollection.org/content/136/4/511.abstract AB