Geological MagazineHenry Woodward Cambridge University Press, 1879 - Geology |
From inside the book
Results 1-5 of 11
Page 244
... corallites are polygonal , comparatively thin - walled , closely in contact , vertical in their direction of growth , and with one or more rows of mural pores on each of their prismatic sides . In the centre of each corallite is a ...
... corallites are polygonal , comparatively thin - walled , closely in contact , vertical in their direction of growth , and with one or more rows of mural pores on each of their prismatic sides . In the centre of each corallite is a ...
Page 245
... corallites have unusually thick walls , and are not in contact at their summits , which are circular . There is , further , the very important fact , that no mural pores can be distinguished in the specimens , notwithstanding the ...
... corallites have unusually thick walls , and are not in contact at their summits , which are circular . There is , further , the very important fact , that no mural pores can be distinguished in the specimens , notwithstanding the ...
Page 246
... corallites are well defined , and occasionally possess a wavy outline . The calice formed by the uppermost tabula is moderately deep , and gradually slopes from the sides to the central tube . The corallites are of generally uniform ...
... corallites are well defined , and occasionally possess a wavy outline . The calice formed by the uppermost tabula is moderately deep , and gradually slopes from the sides to the central tube . The corallites are of generally uniform ...
Page 291
... corallites with entirely open visceral chambers , no tabulæ being present ; and in this has been placed the ... corallite of Cladochonus Michelini , Edw . and H. , from the Carboniferous rocks of Scotland . It must be borne in mind , how ...
... corallites with entirely open visceral chambers , no tabulæ being present ; and in this has been placed the ... corallite of Cladochonus Michelini , Edw . and H. , from the Carboniferous rocks of Scotland . It must be borne in mind , how ...
Page 292
... corallites appear to be entirely open and free from transverse partitions of any kind , while the wall is greatly thickened , and exhibits in parts a very exceptional and abnormal differentiation of its tissues , which entitles it to ...
... corallites appear to be entirely open and free from transverse partitions of any kind , while the wall is greatly thickened , and exhibits in parts a very exceptional and abnormal differentiation of its tissues , which entitles it to ...
Other editions - View all
Common terms and phrases
angular appear basalt base beds Boulder-clay boulders British Cambrian Carboniferous character clay cliffs Coal-measures Coast of Sumatra conglomerate containing corallites corals Cretaceous crystalline denudation deposits described Devonian diamonds Dingle district drift elevation Eocene evidence fauna feet felspar formation fossil fragments gabbro genus Geol geologists glacial glaciers Glengariff granite gravel grits hills hornblende island Journ Lake Limestone Lower M'Coy marine Marl mass Mesozoic metamorphic miles mineral Miocene mountain observed occur Old Red Sandstone origin Palæozoic Paleozoic paper pebbles period Permian Phillips sp plates portion Precambrian present probably Prof quartz raised beach recent referred ridges river rocks sand schists serpentine shales shell side Silurian Skiddaw Skiddaw Slates slate species specimens stones strata Sumatra surface Tertiary thickness tin ground Triassic unconformity Upper Silurian valley volcanic Wales whorls Woodw
Popular passages
Page 565 - NICHOLSON. A Manual of Zoology, for the use of Students. With a General Introduction on the Principles of Zoology. By HENRY ALLEYNE NICHOLSON, MD, D.Sc., FLS, FGS, Regius Professor of Natural History in the University of Aberdeen.
Page 79 - The Carucata, which is also to be interpreted the plough-land, was as much arable as could be managed with one plough and the beasts belonging thereto in a year ; having meadow, pasture, and houses for the house-holders and cattle belonging to it...
Page 33 - Florence of Worcester says : — "On the third day of the nones of Nov. 1099, the sea came out upon the shore, and buried towns and men very many, and oxen and sheep innumerable.
Page 58 - Thus there cannot be the shadow of a doubt as to the length of time which must have elapsed between the close of the Upper Silurian and the commencement of the Carboniferous Period, and of the greatness of the work accomplished in that time.
Page 46 - By JW Davis, Esq., FGS The author described some fossil remains of fish obtained from the bone-bed immediately above the " Better-bed Coal " referred to by him in a former paper (see QJGS vol. xxxii. p. 332). The fossils described included Ichthyodorulites belonging to 4 species, namely : — Pleurodus affinit, a species named, but not described or figured by Agassiz ; Hoplonehus elegans, gen.
Page 381 - On the Cambrian (Sedgw.) and Silurian beds of the Dee Valley, as compared with those of the Lake-district.
Page 156 - The trunks of the trees gradually decay until they are converted into a blackish-brown substance resembling peat, but which still retains more or less of the fibrous structure of the wood ; and layers of this often alternate with layers of clay and sand, the whole being penetrated, to the depth of four or five yards or more, by the long fibrous roots of the willows.
Page 30 - because the lands covered by seas were originally at different altitudes, that the waters have risen, or subsided, or receded from some parts and inundated others. But the reason is, that the same land is sometimes raised up and sometimes depressed, and the sea also is simultaneously raised and depressed, so that it either overflows or returns into its own place again.
Page 46 - Turbinarias (2); Tabulata (1). The paper concluded with remarks on the genera and species represented, from which it appeared that the Coral fauna of Haldon is the northern expression of that of the French and Central European deposits, which are the equivalents of the British Upper Greensand. The Haldon deposit was formed in shallow water, and the corals grew upon the rolled debris of the age. 2. " Notes on Pleurodon affinis, sp. iued., Agassiz, and description of three spines of Cestracionts from...
Page 30 - ... at different altitudes, that the waters have risen, or subsided, or receded from some parts and inundated others. But the reason is, that the same land is sometimes raised up and sometimes depressed, and the sea also is simultaneously raised and depressed, so that it either overflows or returns into its own place again. We must, therefore, ascribe the cause to the ground, either to that ground which is under the sea, or to that which becomes flooded by it, but rather to that which lies beneath...