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Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-03-03 16:09:58 UTC |
Log: | Geology_Rocks_in2020_v01 |
Equipment: | Not specified |
Position: | Latitude: -32.721 Longitude: 105.3469 Position from underway logging |
Sample number: | IN2020_V01_D20_015 |
Dredge: | D20 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | yes, in IN2020_V01_D20_015 |
Number of photos: | 3 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-light |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst abundance (%): | 0 |
Groundmass: | microcrystaline | altered |
Mn crust thickness (mm): | <1 |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 95 |
Grain size: | pebble (2-64 mm) |
Grain shape: | angular |
Sorting: | moderate |
Components: | volcanic non-vesicular |
Cement: | other |
Bucket number: | 2 of 5 |
Rock name: | Moderately to strongly altered basalt breccia |
Original Sample Dimensions: | 21x16x8 cm |
Comments: | Brecciation possibly due to alteration, or autobrecciation. Matrix consits of black and white minerals. Matrix supported. Moderately altered aphanitic basalt clasts. Strongly altered matrix. |