The Geologist, Volume 7

alumina aluminium American Journal amorphous appears arragonite Arthur's Seat Badbury Hill basalt beds birds bones boulder clay carbonate of lime carbonic acid Carboniferous Cautl.-Miocene caves chalk character cliff coast colour containing crystals D'ORB denudation deposits described Devonian district drift earth elevation Eocene existence exposed Falc Fauna feet flint implements fluoride Foraminifera formation Foss fossils Furze Hill genus Geol geologists glacial granite gravel Greensand Haversian tubes heat Hill humerus igneous inches Journal of Science lacunæ limestone Little Coxwell London Clay lower mass matter miles mineral nature nearly numerous observed occur orbit pebbles period Permian planet plates portion present Professor Pteraspis quartz R. I. Murchison Red Sandstone remarkable ribs river rocks sand shells silica silicon Silurian species specific gravity specimens Sponge-gravel stone strata striæ supposed surface teeth temperature Tertiary thick tion tubercles upper valley vapour whorl