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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-13 10:21:43 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -19.4241 Longitude: 155.2828 Position from underway logging |
Sample number: | in2019_v04_D11_010 |
Dredge: | D11 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 4 |
Sticker: | yes |
Colour: | black | grey-dark | brown |
Composition: | mafic |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 10 |
Phenocryst size range (mm): | 0.5-2 |
Groundmass: | microcrystaline |
Features: | volcanic brecciated |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 60 |
Vesicle fill: | clay?, zeolite |
Alteration: | Mn crust | altered |
Grain size: | sand (<2 mm) | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | poor |
Components: | volcanic vesicular | volcanic non-vesicular |
Cement: | zeolite |
Sample bagged: | yes |
Bucket number: | 22 |
Rock name: | Matrix-supported multilithic volcanic breccia |
Comments: | The cement between clasts would be clay (?) and zeolite (?). Plagioclase crystals may be fresh. The clasts in the rock are altered. Mn-oxide crust. |
Sample sawn: | Yes |