Location:

Manganese nodules. Pacific Ocean

Major Minerals:

Todorokite, birnessite, poorly crystalline iron and manganese hydroxides

Trace Minerals:

Include magnetite, ilmenite, haematite, rutile, pyrite, chalcopyrite, bornite, nicolite, covelline

Textures:

The nodules contain inclusions and cores of sedimentary clasts, older nodules or organic material. Complex collomorphic, higher and lower reflectance bands showing shrinkage cracks are typical