Manual of Geology: Theoretical and Practical, Volume 2

Actinozoa Agnostus Ammonites Annelida Archæan Arenig Asaphus Avicula Bala basin beds Brachiopoda Britain calcareous Calymene Cambrian Caradoc Carboniferous limestone Cephalopoda characteristic coal coal-field coal-measures conglomerates Coniston Conocoryphe contain Coral Corallian Cornbrash Crustacea David's deposits Devonian division Echinodermata England fauna feet thick formation forms fossiliferous fossils Gasteropoda genera genus Geol geological grey Harlech Hill horizon Hydrozoa Inferior Oolite Ireland Jurassic Kimmeridge known Lingula Lingulella Llandeilo Llandovery Longmynd Lower Llandovery Lower Silurian marine marls Menevian Middle Devonian Middle Lias North Devon North Wales Ogygia Old Red Sandstone Olenus Orthis Orthoceras Oxford Clay palæontological Palæozoic Paradoxides Pecten Pelecypoda Permian Phacops Ramsey Island range represented Rhynchonella sand schists Scotland Sedgwick shales Shropshire Silurian slates South Wales species occur species pass Spirifera Stiperstones stone strata stratigraphical Tremadoc Trilobita Trinucleus unconformity Upper Devonian Upper Lias Upper Lingula flags Upper Llandovery Upper Ludlow Upper Silurian Wenlock Woolhope yielded Yorkshire Zone