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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-21 03:02:10 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -12.6495 Longitude: 153.6422 Position from underway logging |
| Sample number: | in2019_v04_D32_038 |
| Dredge: | D32 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | amphibole |
| Phenocryst abundance (%): | 30 |
| Phenocryst size range (mm): | 1-3 |
| Vesicle abundance: | absent |
| Alteration: | Mn crust | altered |
| Sample bagged: | yes |
| Bucket number: | 46 |
| Rock name: | Altered amphibole-feldspar phyric (mafic?) rock |
| Comments: | Groundmass crystalline, Mn-crust 3 - 5 mm, altered phenocryst range in size from 1-3 mm, ferromagneseium alterations. |