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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-27 08:47:22 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -14.7525 Longitude: 160.3798 Position from underway logging |
Sample number: | in2019_v04_D45_004 |
Dredge: | D45 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 5 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | grey-dark | white |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst mineralogy: | feldspar |
Phenocryst abundance (%): | 10 |
Phenocryst size range (mm): | 7 |
Groundmass: | microcrystaline |
Vesicle abundance: | 10-30% |
Vesicle Filling (%): | 10 |
Vesicle fill: | clay, Mn-oxide |
Sample bagged: | yes |
Bucket number: | 82 |
Rock name: | Altered feldspar-phyric basalt clast |
Comments: | Vesicles are 0.5-3mm. Larger vesicles filled with non-carbonate clay (?). Single plagioclase lath, 7mm long. Single clast within variably thick Mn-crust. |