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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-19 20:46:37 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: | Latitude: -13.9642 Longitude: 155.518 Position from underway logging |
| Sample number: | in2019_v04_D30_017 |
| Dredge: | D30 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | grey-dark | white | red |
| Composition: | sedimentary |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | other |
| Phenocryst abundance (%): | 30 |
| Phenocryst size range (mm): | <1 - 12 |
| Groundmass: | microcrystaline |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 100 |
| Vesicle fill: | Calcite |
| Alteration: | Mn crust | altered |
| Grain size: | silt |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | volcanic vesicular | volcanic non-vesicular |
| Cement: | calcite |
| Sample bagged: | yes |
| Bucket number: | 41 |
| Rock name: | Altered microcrystalline hyaloclastic basalt breccia |
| Comments: | Mn - crust <1 mm, basalt contained in a calcite matrix, outlines of minerals can be idenitified |