The Story of the Earth in Past AgesMcClure, Phillips, 1904 - 190 pagina's |
Overige edities - Alles bekijken
Veelvoorkomende woorden en zinsdelen
abundant accumulated Alum Bay Ammonites ancient andesites animals appear bones Boulder Clay Bracklesham beds Britain Cambrian Carboniferous Limestone chalk coal measures coal-field coast Coralline corals Crag crystalline denudation Devonian earth earth's surface epoch evidence existing extinct feet thick folds forest formed fossils fresh-water Gault genera genus geological deposits granite grit Headon heat Hill Hunstanton Ichthyosaurs Isle of Wight Kimeridge clay known lake land surface lava layers Lias lime living London clay Lower Greensand Ludlow mammals marine marls mica Millstone Grit mineral character named Neocomian North occur old red sandstone oldest Oolites period Permian plants present day Purbeck quartz remains represented reptiles Rhætic rhyolite sand saurians schists sediments shales shells shore Silurian slates sometimes south of England species stone strata succession teeth termed terrestrial tertiary thin tion Trias types unconformity upheaval Upper Greensand volcanic rocks Wales water-formed rocks Wealden Wenlock Yorkshire
Populaire passages
Pagina 58 - ... be a good general representation of most, if not all large tracts of mountainous countries, together with the parts adjacent, throughout the whole world. From this formation of the earth, it will follow that we ought to meet with the same kinds of earths, stones, and minerals, appearing at the surface, in long narrow slips, and lying parallel to the greatest rise of any long ridges of mountains; and so in fact we find them.
Pagina 59 - ... may be their different denominations. Not that the strata are alike in all the different regions of the earth, either with respect to thickness or quality, for experience shows the contrary ; but that the order of the strata in each particular part, how much soever they may differ as to quality, yet follow each other in a regular succession, both as to thickness and quality— insomuch that by knowing the incumbent stratum, together with the arrangement thereof in any particular part of the earth,...
Pagina 82 - Andesite lavas, of Honister Crag and Seathwaite, mark the beginning of volcanic action which continued through the accumulation of the Borrowdale series of rocks.
Pagina 71 - ... reptiles have lost the greater part of the arch of bones which in fishes intervenes between the brain case and the lower jaw, if their structures are inherited from one group to the other.
Pagina 12 - It has also been calculated that a heat sufficient to melt granite might occur at a depth of 20 or 30 miles.