It is also used to refer to the rock strata those deposits are found in, both in Britain and in the Rhenish hill countries (the Culm Measures), and to coal exported from Britain during the 19th century.
It is also used to refer to the rock strata, both in Britain and in the Rhenish hill countries (the Culm Measures), and to coal. This coal is exported from Britain during the 19th century. Those deposits are found in the rock strata.