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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 01:09:39 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -12.6486 Longitude: 153.6429 Position from underway logging |
| Sample number: | in2019_v04_D32_022 |
| Dredge: | D32 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 5 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black |
| Composition: | intermediate |
| Phenocryst mineralogy: | feldspar | quartz |
| Phenocryst abundance (%): | 15 |
| Phenocryst size range (mm): | 1-3 |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 1 |
| Vesicle fill: | quartz |
| Alteration: | Mn crust |
| Sample bagged: | yes |
| Bucket number: | 45 |
| Rock name: | Feldspar quartz phyric dacite |
| Comments: | Groundmass crystalline, Mn crust 1-2 mm, coour orange to pink, no reaction with HCl, andesite to dacite, quartz may also be infilling of vesicles. |