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Event details
| Voyage: | IN2019_V04 [details] |
| When: | 2019-08-10 15:23:23 UTC |
| Log: | Geology_Rocks_in2019_v04 |
| Equipment: | Not specified |
| Position: |
Latitude: -20.88472 Longitude: 154.61111
- entered into Elog as -20.884722, 154.611111 |
| Sample number: | in2019_v04_D04_012 |
| Dredge: | D04 |
| Sample Number Assigned: | Yes |
| Sample photographed (include scale and sample number): | Yes |
| Number of photos: | 4 |
| Sample sawn: | Yes |
| Sticker: | yes |
| Colour: | black | grey-light | red | brown |
| Composition: | mafic |
| Phenocryst mineralogy: | feldspar | olivine[iddingsite] | glass[fresh] |
| Phenocryst abundance (%): | 10% |
| Phenocryst size range (mm): | 0.2-7 |
| Groundmass: | microcrystaline |
| Features: | volcanic brecciated |
| Vesicle abundance: | 10-30% |
| Vesicle Filling (%): | 100 |
| Vesicle fill: | calcite, clay |
| Alteration: | Fresh | Mn crust |
| Grain size: | pebble (2-64 mm) |
| Grain shape: | angular |
| Sorting: | poor |
| Components: | volcanic vesicular | volcanic non-vesicular |
| Cement: | calcite |
| Sample bagged: | yes |
| Bucket number: | 10 |
| Rock name: | Mafic Volcanic Breccia |
| Comments: | Mn crust 1 mm. Green altered minerals in the matrix. Not sure about the olivine alteration. |