A tropical carbonate beach

Bolongo Beach, St Thomas, US Virgin Islands


	Carbonate sediment from Bolongo Beach

You may need to see the full-sized image to answer the questions below.

Identify the predominant grain size(s) in the lower part of the photograph: boulders cobbles pebbles granules very coarse sand coarse sand medium sand fine sand very fine sand silt and clay	Describe the sorting seen in the sample: very well sorted well sorted moderately well sorted moderately sorted poorly sorted very poorly sorted
Identify the dominant grain shape(s): equant (cubic or spherical) oblate (disc-shaped) bladed prolate (rod or roller shaped)	How would you describe the sphericity of this sample (more than one answer may be correct)? very angular angular subangular subrounded rounded well rounded