Above the coal there is eight inches of a good quality of siliceous limonite iron-ore, containing stems of coal-plants, sigillaria and calamites.
(eight inches of a good quality of siliceous limonite iron-ore; containing; stems of coal-plants, sigillaria and calamites)
eight inches of a good quality of siliceous limonite iron-ore
containing
stems of coal-plants, sigillaria and calamites