The following data relates to a zircon sample from a intensely altered dacitic/andesitic porphyry with IGSN XXAB000YI, named as SHD 13 309.5-312. It has been labelled as B on the mount C-43. The IGSN
The cores and dredges described in this report were taken during the VEMA 14 Expedition from November 1957 until August 1958 by the Lamont Geological Observatory, Columbia University from the R/V Vema
