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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-10 15:55:31 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_020 |
Dredge: | D04 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 5 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-dark |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 15 |
Phenocryst size range (mm): | 0.5-5 |
Groundmass: | microcrystaline |
Features: | volcanic brecciated |
Vesicle abundance: | 30-50% |
Vesicle Filling (%): | 100 |
Vesicle fill: | calcite, clay |
Grain size: | pebble (2-64 mm) | cobble (>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: | Altered minerals - brown in colour - rounded and long veins throughout mafic clasts - well grown calcite crystals in veins and holes |