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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-12 06:40:27 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -19.7731 Longitude: 154.7374 Position from underway logging |
| Sample number: | IN2019_V04_D08_016 |
| Dredge: | D08 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 04 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | amphibole | altered |
| Phenocryst abundance (%): | 0.5-15 |
| Phenocryst size range (mm): | <1 |
| Groundmass: | altered |
| Vesicle abundance: | <10% |
| Vesicle fill: | calcite, clay, Manganese oxide |
| Alteration: | altered |
| Sample bagged: | yes |
| Bucket number: | 19 |
| Rock name: | Single altered trachyte/ Basalt pebble |
| Comments: | Basalt pebble with unaltered centre |