Grain size of sediments

The grain-size comparator below uses real sieved sand which has been set in resin and then polished. Credit card style comparators are also available, printed on plastic.

The small divisions on the ruler are millimetres.

Click on the sediment samples to enlarge.

grain-size comparator granules very coarse sand coarse sand medium sand silt and clay very fine sand fine sand

This page was written by Roger Suthren

Last Modified: 20 January, 2013