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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-13 13:19:17 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -19.1882 Longitude: 155.4706 Position from underway logging |
Sample number: | in2019_v04_D12_005 |
Dredge: | D12 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 5 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | red |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst mineralogy: | olivine[iddingsite] |
Phenocryst abundance (%): | 10 |
Phenocryst size range (mm): | 0.5-1.5 |
Groundmass: | microcrystaline | altered |
Features: | volcanic brecciated |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 30 |
Vesicle fill: | calcite and zeolite |
Grain size: | sand (<2 mm) | pebble (2-64 mm) |
Grain shape: | mixture |
Sorting: | poor |
Sample bagged: | yes |
Bucket number: | 25 |
Rock name: | Matrix supported poorly bedded multilithic pebble breccia |
Comments: | 85mm Mn thickness. Thick Mn oxide crust. Biological structures are present. Clasts are relatively rounded and this may suggest some transportation of clast. Diagram on back. |