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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 04:05:50 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -12.6565 Longitude: 153.6449 Position from underway logging |
| Sample number: | in2019_v04_D30_024 |
| Dredge: | D30 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 5 |
| Phenocryst size range (mm): | 1 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 5 |
| Vesicle fill: | Zeolite |
| Sample bagged: | yes |
| Bucket number: | 48 |
| Rock name: | Altered vesicular feldspar phyric dacite |
| Comments: | Intermediate volcanic rock with small <1mm vesicles; large inclusion of altered feldspar |