| Collection | ABDUG University of Aberdeen, Geological Collections |
| Object Name | Ignimbrite |
| Object Number | ABDUG Rock.8169 |
| Period | Precambrian |
| Brief Description | Spherulitic Ignimbrite; S |
| Place Key | Johnson Shut-in, S.E, Missouri, USA |
| Aquisition Source | Univ. of Kansas |
| Aquisition Date | 01/01/1971 |