What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
Alum Bay angle animals appears argillaceous basin beds belong bones boulders calcareous carboniferous chalk character clay cleavage coal coal-field coal-measures colour conglomerate Coniston Coniston limestone containing Cyrena deposits described Devonian east elevation Eocene evidence exhibited existing fault fauna feet thick formation fossils freshwater genera genus geologists granite gravel greensand greenstone grey grits hills humerus igneous rocks inches island Isle of Wight limestone Littry London clay Lower Silurian Lyell marine marls mass memoir miles mountain Murchison nearly north-east northern nummulitic observed occur Old red organic remains palaeozoic period phaenomena plants plates porphyry portion present quarry red sandstone remarkable resembling ridge river Russia sand schists seams shale shells side Sigillaria Silurian rocks slate slaty species specimens Stigmaria strata strike surface tertiary tion traced upper new red valley Wales Wealden Wenlock White Cliff Bay whole
Page 220 - A work of immense labour and research Nothing has ever appeared in lithography in this country at all comparable to these plates : and as regards the representations of minute osseous texture, by Mr. Ford, they are perhaps the most perfect that have yet been produced in any country. . . . The work has commenced with the Elephant group, in which the authors say ' is most signally displayed the numerical richness of forms which characterises the Fossil Fauna of India ;' and the first chapter relates...
Page 102 - GCS] AMBER appears to be a product formed during the period of the Molasse. The forests in which the trees grew whence this substance was derived, were situated in the south-eastern part of what is now the bed of the Baltic, in about 55° north latitude, and 37°-38° east longitude.
Page 284 - They occupy a rocky mound about half a mile long and a quarter of a mile wide, having an elevation of 50 or 60 feet above the adjacent valley.
Page 188 - We are thus brought to admit the truth of another of the fundamental doctrines of the Huttonian theory, laid down by its author more than half a century ago, and some years afterwards so eloquently illustrated by his disciple and friend Playfair, whom I am proud to call my first master in Geology, " that in all the strata we discover proofs of the materials having existed as elements of bodies, which must have been destroyed before the formation of those of which these materials now actually make...
Page 205 - ... are met with. The furrows have been found in the New England hills at all heights, even to as much as 2000 feet. In one place, on the summit of a high hill of sandstone, Mr Lyell saw an erratic block of greenstone 100 feet in circumference. The erratic blocks and boulder formation have been transported southwards along the same lines as are marked out by the direction of the furrows : in New England, from NNW. to SSE. ; in the valley of the St Lawrence, from north-east to south-west. With regard...
Page 46 - ... 9°, leaving the northern and middle hills in their former position, but inclining the strata to the south to 57° ; the line of division is marked by an indentation to the south of the signal-post, called in Spanish La Quebrada, or broken ground. We are now arrived at the fourth epoch in the history of the rock ; and in this locality we find deposits belonging to each. At one spot a little to the east of Martin's Cave, and looking towards it, the whole of them may be seen in juxtaposition. 4....
Page 19 - Upper coal-measures. miuates in two singular rounded projections, which have evidently been pushed up by the underlying strata. It is succeeded by about one yard of red clays, which bear evidence of considerable pressure having been exerted upon them. Then come regular coal-measures, dipping SSW at angles varying from 80° to 70°. These last-named strata are in the lower part of the middle coal-field ; the whole of the thick beds of this valuable deposit being here covered up by the upper new red...
Page 194 - Everything in this southern continent has been effected on a grand scale : the land, from the Rio Plata to Tierra del Fuego, a distance of 1200 miles, has been raised in mass (and in Patagonia to a height of between 300 and 400 feet), within the period of the now existing sea-shells. The old and weathered shells left on the surface of the upraised plain still partially retain their colours.
Page 247 - Limnfca cornea are limited in their range to the ' Calcaires lacustres.' The Planorbis rotundatus has been found in some of the divisions of the ' Argile plastique ' ; and, according to M. d'Archiac, it occurs associated with Limnaa longiscata in the upper beds of the calcaire grossierf, but characterizes more especially the overlying freshwater deposits. The Cyrena cuneiformis and Melanopsis buccinoidea are characteristic of the 'Argile plastique...
Page 194 - I have convincing proofs that this part of the continent of South America has been elevated near the coast at least from 400 to 500, and in some parts from 1000 to 1300 feet, since the epoch of existing shells; and further inland the rise possibly may have been greater.