Cook Islands manganese nodules
![Flat underwater surface with many rocks tucked in close to each other; bright stripes of tape on rod that is touching bottom.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Cook-Islands_nodule_0.jpg?itok=gblOPVia)
Detailed Description
A bed of manganese nodules from deep offshore of the Cook Islands; photo sourced from Hein et al., 2015, taken during a Japanese research cruise in the year 2000. Nodules range from about 2 to 10 centimeters across.
See a photo of more manganese nodules.
Sources/Usage
Public Domain.