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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-29 09:32:35 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.6367 Longitude: 158.3926 Position from underway logging |
| Sample number: | in2019_v04_D49_004 |
| Dredge: | D49 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | white | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar |
| Phenocryst abundance (%): | 5 |
| Phenocryst size range (mm): | 1-4 |
| Groundmass: | microcrystaline |
| Features: | volcanic brecciated |
| Vesicle abundance: | 30-50% |
| Vesicle Filling (%): | 10 |
| Vesicle fill: | zeolite |
| Grain size: | sand (<2 mm) | pebble (2-64 mm) | cobble (>64 mm) |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | volcanic vesicular |
| Cement: | zeolite |
| Sample bagged: | yes |
| Bucket number: | 87 |
| Rock name: | Feldspar-phyric vesicular basaltic clast breccia |
| Comments: | A cobble-sized basaltic clast (very vesicular). Clast contains fresh feldspar. Soft material between clasts. Space in matrix between clasts. Clasts altered mostly. |