| Rec | Mtg# | Year | Authors | Institution | Talk title |
|---|---|---|---|---|---|
| 1 | 834 | 1962 | Gerhard William Leo | USGS | Petrologic problems of the Serra de Jacobena |
| 2 | 906 | 1968 | Gerhard William Leo | USGS | Geology and geochronology of western Liberia |
| 3 | 953 | 1972 | Gerhard William Leo | USGS | U. S. Geological Survey program in Turkey 1968-1970 |
| 4 | 1039 | 1978 | Gerhard William Leo | USGS | Andesite-rhyolite volcanism in western Sumatra, Indonesia |
| 5 | 1074 | 1981 | Gerhard William Leo | USGS | Trondhjemites associated with Oliverian domes, western New Hampshire and central Massachusetts |