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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-31 11:59:09 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -22.9458 Longitude: 159.7904 Position from underway logging |
| Sample number: | in2019_v04_D53-006 |
| Dredge: | D91 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | y |
| Number of photos: | 3 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | red | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
| Phenocryst abundance (%): | 40 |
| Phenocryst size range (mm): | 2-10 |
| Groundmass: | microcrystaline |
| Features: | other |
| Vesicle abundance: | <10% |
| Vesicle Filling (%): | 10 |
| Vesicle fill: | Calcite and clay |
| Sample bagged: | yes |
| Bucket number: | 91 |
| Rock name: | Altered iddingsite-physic basalt |
| Comments: | 30 mm Mn crust. Massive Feature. Plagioclase laths in groundmass. Very large iddingsite? Phenocrysts. Now altered to clay. |