Rights: Terry and Janice Dowdeswell Published 30 June 2010 Size: 150 KB

Rain slowly dissolves minerals from rocks – a process called weathering. These minerals eventually get washed into the sea, where some minerals, such as calcium carbonate, add to sediments at the bottom of the ocean. A lot of organic matter from the soil also gets carried to sea by rivers.

Acknowledgement: Terry and Janice Dowdeswell