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Event details
Voyage: | IN2020_V01 [details] |
When: | 2020-02-26 16:29:55 UTC |
Log: | Geology_Rocks_in2020_v01 |
Equipment: | Not specified |
Position: | Latitude: -32.324 Longitude: 97.8945 Position from underway logging |
Sample number: | IN2020_V01_D18_005 |
Dredge: | D18 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | yes, in IN2020_V01_D18_005 |
Number of photos: | 5 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | grey-dark | pink | brown | green |
Composition: | mafic |
Alteration: | Mn crust | altered |
Phenocryst abundance (%): | 0 |
Groundmass: | microcrystaline | altered |
Mn crust thickness (mm): | 2 |
Vesicle abundance: | <10% |
Vesicle Filling (%): | 95 |
Vesicle fill: | Clay and light green minerals |
Sample bagged: | yes |
Bucket number: | 1 of 1 |
Rock name: | Strongly altered, vesicular, aphanitic basalt |
Original Sample Dimensions: | 25.5x18x6 cm |
Comments: | Possibly in-situ. Band of red/brown Fe oxide alteration, and area of green (chlorite?) alteration. ~30% fracturing, infilled with clays. |