Geological Magazine, Volume 6

Ammonites appear beds Belaugh Belemnites belong Boulder-clay breccia British Carboniferous Chalk character Chillesford clay coal cone containing Crag Cretaceous denudation deposits described diphya district drift England eruptions evidence exhibited existence fauna feet felspathic fissures flint formation fossils fragments Gault genera genus Geol Geological Society Geological Survey geologists Glacial gneiss granite gravel Green Slates Greensand heat hills Hyperodapedon inches Inferior Oolite lake land lava Lias limestone Lower marine marl mass Mastodon matter miles mineral Miocene mountain Museum nearly Neocomien Norwich observations occur Old Red Sandstone origin paper period Plate Porphyries portion present probably Prof Professor R. I. Murchison Red Sandstone referred remains remarkable ridge river rocks sand schists seen shales shells side Silurian Skiddaw Slates soil species specimens sporangia stone strata structure surface teeth thickness tion tooth trachytic trap Trogontherium upper valley volcanic