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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 04:08:07 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -12.6567 Longitude: 153.6449 Position from underway logging |
| Sample number: | in2019_v04_D30_025 |
| Dredge: | D30 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | brown |
| Composition: | intermediate |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar | amphibole |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | 0.1-1 |
| Groundmass: | microcrystaline | altered |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 100 |
| Vesicle fill: | Altered material |
| Sample bagged: | yes |
| Bucket number: | 48 |
| Rock name: | Altered trachyte |
| Comments: | From sediment bucket; some 1mm size prismatic black to brown phenocrysts (amphibole); 1mm size feldspar laths; lots of 0.1mm black crystals in groundmass - too altered to identify; some vessicle filled with black/brown altered material |