White chalk pebbles from the Jurassic Coast in a blue bowl – looking a bit like mint imperial sweets. They are smooth, rounded, slightly flattened, frequently ovoid, porous, and have a matt surface.
Chalk is one of several rocks from which white pebbles are made. Chalk is a Cretaceous rock and outcrops in many places along the seashores of the Jurassic Coast. The photographs show some arrangements of these chalk pebbles; and also illustrate how they look on the beach when naturally occurring. In the shore pictures, they are mixed with mostly grey flint and yellow chert pebbles against which the white pebbles contrast and stand out. The pebbles are shown at various magnifications and in both the wet and dry condition.
Pebbles of white chalk with grey flint and yellow chert on a Jurassic Coast seashore.
Revision of a post first published 17 July 2009
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