| Rec | Mtg# | Year | Authors | Institution | Talk title |
|---|---|---|---|---|---|
| 1 | 1030 | 1978 | John W. Morgan | USGS | What on earth (!?) made the Ries Crater |
| 2 | 1228 | 1992 | Holly Stein; John W. Morgan; Richard J. Walker; Mary Horan |
USGS | Re-Os isotope study of a climax-type granite-molybdenum system at Mount Emmons, Colorado |