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Event details
Voyage: | IN2018_V08 [details] |
When: | 2019-01-08 08:51:33 UTC |
Log: | Geology_Rocks_in2018_v08 |
Equipment: | Not specified |
Position: | Latitude: -46.0217 Longitude: 150.3063 Position from underway logging |
Sample number: | IN2018_V08_D16_036 |
Dredge: | 16 |
Dredge Date: | 08/01/2019 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Sample sawn: | Yes |
Sawn sample photographed: | Yes |
Number of photos: | 2 |
Colour: | black | grey-dark | brown |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst mineralogy: | feldspar | pyroxene |
Phenocryst abundance (%): | 20-30 |
Phenocryst size range (mm): | 4-6 |
Groundmass: | microcrystaline |
Vesicle abundance: | low (<30%) |
Sample bagged: | yes |
Sticker: | yes |
Bucket number: | 048 |
Rock name: | Feldspar pyroxene phyric basalt |
Comments: | Fresh looking feldspar lathe with orange altered pyroxene olivine? and a dark glassy mineral phenocryst. Thin Mn-o ~1cm thick crust |