. Fossil plants : for students of botany and geology . Paleobotany. in] PERMIAN PERIOD. 45' part of the Earth's crust. In the neighbourhood of London,. Dover, and other places we have Tertiary and Mesozoic strata forming the surface of the country, but below these comparatively recent formations, the sinking of deep wells and other borings have proved the existence of a ridge of Palaeozoic rocks- stretching from the South Wales Coal-field through the South- east of England to northern France, Belgium and Westphalia. It is from rocks forming part of this old ridge that characteristic Coal-Measu
. Fossil plants : for students of botany and geology . Paleobotany. in] PERMIAN PERIOD. 45' part of the Earth's crust. In the neighbourhood of London,. Dover, and other places we have Tertiary and Mesozoic strata forming the surface of the country, but below these comparatively recent formations, the sinking of deep wells and other borings have proved the existence of a ridge of Palaeozoic rocks- stretching from the South Wales Coal-field through the South- east of England to northern France, Belgium and Westphalia. It is from rocks forming part of this old ridge that characteristic Coal-Measure plants have been obtained from the Dover boring. In Fig. 5 is shown an almost complete pinnule of Neuropteris Scheuchzeri Hoffm., a well-known fern, marking a definite horizon of Upper Carboniferous rocks ^ The small hairs on the pinnules, shown in the figure as fine lines lying more or less parallel to the midrib and across the lateral veins, are a characteristic feature of this Fig. 5. Imperfect pinnule of Neuropteris Scheuchzeri Hoffm., showing the character- istic hairs as fine lines traversing the lateral veins. From a specimen obtained from the Dover boring and now in the British Museum. Nat. size. VII. Permian. Reference has already been made to the earth-foldings- which marked the close of Carboniferous times; "the open Mediterranean sea of the Carboniferous period in Europe was converted into a large inland sea, Hke the Caspian of the present day, surrounded by a rocky and hilly continent, on which grew trees and plants of various kinds^." In parts of 1 Vide Zeiller (92) for a list of species of Coal-Measure plants found in. the pieces of shale included in the core brought up by the borer. 2 Jukes-Browne (86), p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
