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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-12 23:27:57 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -19.4497 Longitude: 155.0895 Position from underway logging |
Sample number: | in2019_v04_D10_008 |
Dredge: | D10 |
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 |
Phenocryst mineralogy: | feldspar | olivine[iddingsite] |
Phenocryst abundance (%): | 50 |
Phenocryst size range (mm): | 1-2 |
Groundmass: | altered |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 30 |
Vesicle fill: | calcite |
Alteration: | Mn crust | altered |
Grain size: | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | poor |
Cement: | calcite |
Sample bagged: | yes |
Bucket number: | 20 |
Rock name: | Olivine Feldspar phyric basalt |
Requested: | UK | Monash |
Comments: | Mn-crust 5 mm, abundant feldspar minerals, some altered olivines, most of the minerals are pseudomorphic |