Focus on Sedimentary Environments

A tropical carbonate beach

Bolongo Beach, St Thomas, US Virgin Islands


	Under the microscope: carbonate sediment from Bolongo Beach in plane-polarized light See the sample in cross-polarized light

Identifying sediment components

In this thin-section view of the carbonate beach gravel, you should be able to identify some of the components. Roll the cursor over the image to see the labelled grains, write down your answers, then try the quiz below:

Grain A:

Grain B:

Grain C:

Grain D:

Grain E:

Grain F: