 | 1859 - عدد الصفحات: 574
...became resolved by decay into shells of bark and loose fragments of rotten wood, which currents must have swept away, but which the most gentle inundations,...the true conifers show rings of growth not larger, or much less distinct, than those of many of their northern congeners*. The Sigillariee and Calamites... | |
 | 1860 - عدد الصفحات: 448
...become resolved by decay into shells of bark and loose fragments of rotten wood, which currents must have swept away, but which the most gentle inundations,...temperate zone, was of such a character that the true coniferi show rings of growth not larger, or much less distinct, than those of many of their northern... | |
 | 1860 - عدد الصفحات: 612
...by decay into shells of bark and loose fragments of rotten wood, which currents would uecesaarilly have swept away, but which the most gentle inundations...accumulation of coal was very slow. The climate of the periodi in the northern temperate zone, was of such a character that the true Conifers show riugs of... | |
 | 1867 - عدد الصفحات: 448
...become resolved by decay into shells of bark and loose fragmenta of rotten wood, which currents must have swept away, but which the most gentle inundations,...the true conifers show rings of growth not larger, or much less distinct, than those of many of their northern congeners.* The Siyukariœ and Calamites... | |
 | Sir John William Dawson - 1868 - عدد الصفحات: 754
...materials were accumulated by growth, without any driftage of materials. The Sigillarice and Calamitece, tall and branchless, and clothed only with rigid linear...the true conifers show rings of growth not larger or much less distinct than those of many of their modern congeners.* The Sigillarice and Calamite.s... | |
 | sir John William Dawson - 1868 - عدد الصفحات: 870
...subaerial decay, occasioned by greater or less dryness of the swampy flats on which the coal accumulated. into shells of bark and loose fragments of rotten...the true conifers show rings of growth not larger or much less distinct than those of many of their modern congeners.* The Sigillarice and Calamites... | |
 | 1860 - عدد الصفحات: 448
...become resolved by decay into shells of bark and loose fragments of rotten wood, which currents must have swept away, but which the most gentle inundations,...the true conifers show rings of growth not larger, or much less distinct, than those of many of their northern congeners.* The Siyillarice and Calamites... | |
 | Sir John William Dawson - 1878 - عدد الصفحات: 868
...subaerial decay, occasioned by greater or less dryness of the swampy flats on which the coal accumulated. into shells of bark and loose fragments of rotten...the true conifers show rings of growth not larger or much less distinct than those of many of their modern congeners.* The Sigillarice and Calamites... | |
 | Sir John William Dawson - 1891 - عدد الصفحات: 906
...wood, which currents would necessarily have swept away, but which the most gentle inundations or oven heavy rains could scatter in layers over the surface,...the true conifers show rings of growth not larger or much less distinct than those of many of their modern congeners.* The Sigillarice and Calamites... | |
 | Charles William Vernon - 1903 - عدد الصفحات: 348
...devotion to his favorite study. The carboniferous period was a long one. Sir William Dawson says that " the climate of the period in the northern temperate...the true conifers show rings of growth not larger or much less distant than those of many of their modern congeners." The trees which grew in the coal... | |
| |
... have swept away, but which the most gentle inundations or even heavy rains could scatter in layers over the surface, where they gradually became imbedded in a mass of roots, fallen leaves, and herbaceous plants. " 4. The rate of accumulation of coal... 
