Transactions of the Edinburgh Geological Society, Volume 3The Society, 1880 |
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Página 3
... beds , but absent in the middle series ; supposing , of course , that the beds occupy the same area or two areas geographically close together . I may take an example from what we see in the Hudson River group , the Medina sandstone ...
... beds , but absent in the middle series ; supposing , of course , that the beds occupy the same area or two areas geographically close together . I may take an example from what we see in the Hudson River group , the Medina sandstone ...
Página 6
... beds , and must have returned to it again at the time when the upper set of beds com- menced to be laid down . And in these cases we have reason to know that the period occupied by the migration must have been an exceedingly long one ...
... beds , and must have returned to it again at the time when the upper set of beds com- menced to be laid down . And in these cases we have reason to know that the period occupied by the migration must have been an exceedingly long one ...
Página 24
... beds . Nor can we find fault with this , provided the descrip- tion is in the main correct . In dealing with these rocks , I shall begin by describing a series of transverse sections of the district , and by tracing the beds inland ...
... beds . Nor can we find fault with this , provided the descrip- tion is in the main correct . In dealing with these rocks , I shall begin by describing a series of transverse sections of the district , and by tracing the beds inland ...
Página 25
... bed of fireclay overlaid by a bed of coal about nine inches thick ; overlying these are beds of sandstone and shale , into which intrusive beds of igneous rocks have been injected , hardening and cutting through the beds in many places ...
... bed of fireclay overlaid by a bed of coal about nine inches thick ; overlying these are beds of sandstone and shale , into which intrusive beds of igneous rocks have been injected , hardening and cutting through the beds in many places ...
Página 26
... beds in the line of strike , and find the repre- sentatives of the shore section about two miles inland . If we take the centre of the section at the base of the Wardie shales , where the strike appears to be most persistent , and ...
... beds in the line of strike , and find the repre- sentatives of the shore section about two miles inland . If we take the centre of the section at the base of the Wardie shales , where the strike appears to be most persistent , and ...
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Palavras e frases frequentes
agricultural appearance Arthur's Seat basalt Bathgate beds Borrowstounness boulder-clay boulders Brachiopoda Burn Carb Carboniferous clay cliff Coal coast Coll colour conglomerate Corstorphine Hill Crag and tail denudation deposits district east Edinburgh evidence exhibited feet Fife figs Firth flints formation fossils Geological Society Geological Survey geologists glacial glacier Glasgow gneiss gold granite Granton gravel greenstone Halonia igneous rocks inches Inverness Ireland James lava Leadhills LL.D Loch Lothians Lower Limestone series mass Mer de Glace miles minerals moraines Museum nodules observed occur Old Red Sandstone paper pebbles Pentland period phenomena phosphorescence porphyritic portion present Professor Geikie quarry quartz Ralph Richardson river roches moutonnées rounded Salisbury Crags Samson's Ribs sand scars schists Science Scotland Scottish seen shales side Silurian soil species specimens stone strata stratified Street striæ surface theory thickness tuff Ulodendron upper valley vegetable volcanic
Passagens conhecidas
Página 123 - ... now mentioned ; and this augmentation evidently can proceed from nothing but the constant and slow disintegration of the rocks. In the permanence, therefore, of a coat of vegetable mould on the surface of the earth, we have a demonstrative proof of the continual destruction of the rocks...
Página 139 - Director of the Geological Survey of Ireland, and Professor of Geology in the Royal College of Science, Dublin. MONTAGUE RHO[)ES JAMES, MA, Litt.D., Fellow and Dean of King's College, and Director of the Fitzwilliam Museum, Cambridge. Rev. CHW JOHNS, MA, Queens
Página 256 - In the North-western provinces of Canada wheat often produces 40 and 50 bushels to the acre, while in South Minnesota 20 bushels is the average crop, in Wisconsin only 14, in Pennsylvania and Ohio 15. The fact established by climatologists that the cultivated plants yield the greatest products near the northernmost limit at which they grow, is fully illustrated in the productions of the Canadian territories...
Página 108 - This ridge, at the distance of about seven and a half miles from the sea at Salthouse-head, attains an inland distance of about five miles from the coast opposite Slains. The flints are met with on the surface at various points along that line. The ridge is bare and moorish, but covered with peat and heather, and this prevents the flints from being accurately traced.
Página 110 - Echini family, occasionally entire, but more frequently only small portions of the impressions ol these shells are found. Single spines frequently occur and are well marked. The Innoceramus, Pecten, and Terebratula abound.
Página 140 - Soc." i. 1838, p. 175". 7. Notice of the Discovery of some Remains of the Ichthyosaurus in Ireland. " Phil. Mag." xx.' 1842, p. 83. 8. Notices of the Geology of the Island of Bute.
Página 115 - ... near their highest, and at an equal elevation, the various bays and promontories, it requires no great stretch of imagination to conceive of the waves of the German Ocean as having once rolled even hither, bearing with them, and depositing on their innermost bounds, the rounded flints that mark their ancient shore. But it may be argued, The greensand beds lay right in the way, and must have suffered also from the denuding power of the waves. If future examination shows that these beds are in...
Página 148 - ... for a little, so as to melt it before proceeding to use the lamp. After use, and while the wax is melted, the wick should be pulled up about £ of an inch with a pair of tweezers before the wax solidifies, otherwise the wick will be too short to allow of trimming before the next operation. VIII. — Historical Notes on the Occurrence of Gold in the South of Scotland.
Página 108 - Buchanness, and stretching across the country for eight or ten miles ; at its eastern extremity it branches. One of the forks terminates south of Buchanness, in the mass of granite known as Stirling Hill. The other runs north of Buchanness and may be said to terminate in the granitic escarpment of the Black Hills. All along the shore between these points, wherever the rocks admit 'of a beach, quantities of water-worn flints are found mingled with the other pebbles, evidently brought there by the...
Página 131 - Forbes' classification of rocks into Ingenite rocks (born, bred, or created within or below), and second, Derivative rocks, " since directly or indirectly they are all derived from the destruction of the former," the initial letters I and D might serve as major parts of our symbols, along with either a smaller letter to denote chemical composition, and another geological conditions. Thus the plug at Arthur's Seat might be represented If ; and the beds on Calton Hill thus...