 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,...  Geological Magazine - עמוד 156נערך על ידי - 1879תצוגה מלאה - מידע על ספר זה
 | 1860 - 566 דפים
...to their different ages. The trunks 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. Layers of this substance often alternate with layers of clay and sand, the whole being penetrated to... | |
 | Sir Charles Lyell - 1832 - 368 דפים
...different ages. The trunks of the trees gradually decay until they are converted into a blackish brown substance resembling peat, but which still retains...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... | |
 | Sir Charles Lyell - 1832 - 358 דפים
...ages. The trunks of the trees gradually decay until they are converted into a blackish brown subgtance resembling peat, but which still retains more or less...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... | |
 | Sir Charles Lyell - 1834 - 440 דפים
...the diversity of appearances they present, according to their different ages. The trunks of the trees gradually decay until they are converted into a blackish-brown...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... | |
 | Sir Charles Lyell - 1835 - 442 דפים
...the diversity of appearances they present, according to their different ages. The trunks of the trees gradually decay until they are converted into a blackish-brown...more or less of the fibrous structure of the wood ; tnd layers of this often alternate with layers of clay and sand, the whole being penetrated, to the... | |
 | Hamilton Lanphere Smith - 1848 - 336 דפים
...different ages. The trunks of the trees gradually decay until they are converted into a blackish brown substance, resembling peat, but which still retains...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... | |
 | Robert Ellis (F.L.S.) - 1850 - 548 דפים
...above water, and their fibrous roots serve to bind the whole together firmly. The trunks of the trees gradually decay, until they are converted into a blackish-brown...still retains more or less of the fibrous structure of wood." If we now suppose this island sunk to the bottom of the river, covered over with many beds of... | |
 | David Page - 1856 - 348 דפים
...the diversity of appearances they present, according to their different ages. The trunks of the trees gradually decay until they are converted into a blackish-brown...resembling peat, but which still retains more or less the structure of the wood ; and layers of this often alternate with layers of clay and sand, the whole... | |
 | David Page - 1859 - 422 דפים
...blackish-brown substance resembling peat, but which still retains more or less the structure of the wood ; aud layers of this often alternate with layers of clay and sand, the whole being penetrated, to the depth of four or five yards, by the long fibrous roots of the willows.... | |
 | Sir Charles Lyell - 1868 - 692 דפים
...appearances they present, according to their different ages. The trunks of the trees gradually decay imtil they are converted into a blackish-brown substance...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... | |
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