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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-12 06:09:44 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -19.7919 Longitude: 154.7232 Position from underway logging |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | glass | crystals | volcanic vesicular |
| Sample bagged: | yes |
| Bucket number: | 18 |
| Rock name: | Ferrous oxide altered Trachyte breccia |
| Comments: | 30-40% of rock is altered with ferroous oxide, tip of the rock is altered with blackcrystals( felsic rock ) |
| Sample number: | IN2019_V04_D08_009 |
| Dredge: | D08 |
| Dredge Date: | 12.08.2019 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 02 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | brown | green |
| Composition: | mafic |
| Phenocryst abundance (%): | 10 |
| Phenocryst size range (mm): | <1 |
| Groundmass: | glassy | microcrystaline | altered |
| Features: | volcanic brecciated |
| Vesicle abundance: | 30-50% |
| Vesicle fill: | Nil |