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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-13 10:41:21 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -19.4222 Longitude: 155.2864 Position from underway logging |
Sample number: | in2019_v04_D11_014 |
Dredge: | D11 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 4 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | grey-dark | brown |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst mineralogy: | feldspar | pyroxene |
Phenocryst abundance (%): | 15 |
Phenocryst size range (mm): | 0.5-3 |
Groundmass: | microcrystaline |
Features: | volcanic brecciated |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 30 |
Vesicle fill: | zeolite |
Grain size: | sand (<2 mm) | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | poor |
Components: | volcanic vesicular |
Sample bagged: | yes |
Bucket number: | 22 |
Rock name: | Matrix-supported multilithic volcanic pebble breccia |
Comments: | The rock is similar to D11-010. Some mafic clasts contain fresh Plagioclase and pyroxene, most clasts are altered into orangy brown clasts. See sketch! |