 | 1849 - 428 ページ
...fossilized in the superincumbent shales. attached to those roots in soils similar to the under-clays, but unconnected with any seam of coal. These stumps...seem deposited between these stumps. The rarity of Sigillari<E roots (Stigmariae) in this position, is probably due to their being incorporated with the... | |
 | 1849 - 424 ページ
...fossilized in the superincumbent shales. attached to those roots in soils similar to the under-clays, but unconnected with any seam of coal. These stumps...seem deposited between these stumps. The rarity of Sigittariee roots (Stigmarise) in this position, is probably due to their being incorporated with the... | |
 | Robert Hunt - 1851 - 492 ページ
...matter. Amongst the shales are also interspersed, in many cases, innumerable stumps of Sigillarice similar to those whose roots occur in the under-clay,...seem deposited between these stumps. The rarity of Sigillarice roots (Stigmarioe) in this position is probably due to their being incorporated with the... | |
 | Charles Knight - 1866 - 586 ページ
...mineral matter. Amongst the shales are also interspersed in many cases innumerable stumps of Sigillanai, similar to those whose roots occur in the under-clay,...found attached to those roots in soils similar to the under-clays, but unconnected with any seam of coal. These stumps are almost universally erect, are... | |
 | Charles Knight - 1867 - 634 ページ
...mineral matter. Amongst the shales are also interspersed in many cases innumerable stumps of Sigillaria, similar to those whose roots occur in the under-clay,...found attached to those roots in soils similar to the under-clays, but unconnected with any seam of coal. These stumps are almost universally erect, are... | |
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... the coal and shale, that it is still a disputed point whether the plants contained 'in the latter actually grew upon the former, or were drifted to that position in the fluid which deposited the mineral matter. Amongst the shales are also interspersed,... 