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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-12 05:44:27 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -19.7466 Longitude: 154.6574 Position from underway logging |
| Sample number: | IN2019_V04_D08_004 |
| Dredge: | D08 |
| Dredge Date: | 12.08.2019 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 03 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | grey-light | green |
| Phenocryst mineralogy: | feldspar | amphibole | altered | other |
| Phenocryst abundance (%): | 5 |
| Phenocryst size range (mm): | 1-2 |
| Groundmass: | altered |
| Vesicle abundance: | absent |
| Alteration: | altered |
| Sample bagged: | yes |
| Bucket number: | 17 |
| Rock name: | Trachyte |
| Comments: | Shiny groundmass altered to white mica, ~2mm sized phenocryst- black prismatic with cleavage and amphibole |