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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-23 05:05:17 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -10.4878 Longitude: 156.8511 Position from underway logging |
| Sample number: | in2019_v04_D35-027 |
| Dredge: | D35 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 2 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | pyroxene |
| Phenocryst abundance (%): | 25 |
| Phenocryst size range (mm): | 0.5-3mm |
| Groundmass: | altered |
| Vesicle abundance: | absent |
| Alteration: | Mn crust |
| Sample bagged: | yes |
| Bucket number: | 58 |
| Rock name: | Altered pyroxene-rich dolerite |
| Comments: | Mn crust thickness 20mm. Very dark and large px phenocrysts. Possible pyroxenite (ultramafic?). Plagioclase laths in groundmass. FeOx alteration. |