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Event details
Voyage: | IN2019_V04 [details] |
When: | 2019-08-21 10:25:12 UTC |
Log: | Geology_Rocks_in2019_v04 |
Equipment: | Not specified |
Position: | Latitude: -13.4256 Longitude: 153.9392 Position from underway logging |
Sample number: | in2019_v04_D33-013 |
Dredge: | D33 |
Sample Number Assigned: | Yes |
Sample photographed (include scale and sample number): | Yes |
Number of photos: | 3 |
Sample sawn: | Yes |
Sticker: | yes |
Colour: | black | brown |
Composition: | sedimentary |
Alteration: | Fresh | Mn crust | altered |
Grain size: | silt |
Grain shape: | rounded |
Sorting: | good |
Components: | other |
Sample bagged: | yes |
Bucket number: | 48 |
Rock name: | Trace fossil rich mudstone |
Comments: | Mn crust 18 mm thick. A silt rich mudstone? Trace fossils include dwelling structures? more like simple vertical tubes (see sketch) - thick Mn layers are found in the mudstone itself - whole rock is full of vertical burrows - all burrows have an Mn layer on their wall and some of them are fully or partially filled with Mn oxide, clay or foraminifera ooze? |