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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-28 22:08:09 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -17.0472 Longitude: 159.2202 Position from underway logging |
| Sample number: | in2019_v04_D48_007 |
| Dredge: | D48 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 7 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-dark | white | red | brown |
| Composition: | mafic |
| Alteration: | Mn crust | altered |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
| Groundmass: | altered |
| Vesicle abundance: | >50% |
| Vesicle Filling (%): | 70 |
| Vesicle fill: | Calcite, Clay, Zeolite |
| Grain size: | pebble (2-64 mm) | cobble (>64 mm) |
| Grain shape: | mixture |
| Sorting: | poor |
| Components: | volcanic vesicular | volcanic non-vesicular |
| Cement: | zeolite |
| Sample bagged: | yes |
| Bucket number: | 83 |
| Rock name: | Olivine phyric basalt, zeolite cemented breccia |
| Comments: | Mn - crust <1 mm, breccia contains vesicular basalt with very rounded vesicles, cemented in white material that doesn't fizz with HCl, zeolite?, altered phenocrysts visible throughout sample. |