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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-21 03:22:36 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -12.6511 Longitude: 153.6436 Position from underway logging |
Sample number: | in2019_v04_D32_044 |
Dredge: | D32 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 4 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | white | red | brown |
Composition: | mafic |
Phenocryst mineralogy: | other |
Phenocryst abundance (%): | 40 |
Phenocryst size range (mm): | <1 - 1 |
Groundmass: | altered |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 100 |
Vesicle fill: | Calcite |
Alteration: | Mn crust | altered |
Sample bagged: | yes |
Bucket number: | 47 |
Rock name: | Altered fine grained mafic rock |
Comments: | Mn - crust 30 mm, grainsize very fine, volcanic or sedimentary? silvery coloured grains in areas, probably zeolite, orange coloured bands across some of the inclusions. |