Page:The South Staffordshire Coalfield - Joseph Beete Jukes - 1859.djvu/32

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The Coal-measures of North Staffordshire consist very largely of argillaceous (or clayey) materials, more or less mingled or alternated with arenaceous (or sandy) and carbonaceous (or coaly) substances. These different beds have various local names, of which the following is a nearly complete list:—

Arenaceous Materials. —The siliceous or arenaceous beds of the coal-measures have the following local names:—

