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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-10 15:50:19 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_018 |
Dredge: | D04 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 3 |
Sample sawn: | No |
Sticker: | yes |
Colour: | black | grey-light | brown | yellow |
Composition: | mafic |
Phenocryst mineralogy: | olivine[iddingsite] |
Phenocryst abundance (%): | 10 |
Phenocryst size range (mm): | 1 |
Groundmass: | microcrystaline |
Features: | volcanic brecciated |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 50 |
Alteration: | Mn crust | altered |
Grain size: | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | poor |
Components: | volcanic vesicular | volcanic non-vesicular |
Cement: | calcite |
Sample bagged: | yes |
Bucket number: | 11 |
Rock name: | Mafic volcanic breccia |
Comments: | Voids covered with connected, bubble like, calcite crystals, around 1mm |