. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. i ill 1 'iiiii* 1 'â ',m\ ] â ': ''fti , i: â , â¢"â â ' ⢠* â I'M'' 1 â 'i. V\ t 408 Tllli CAUUONIFEROUS SYSTEM. ever been observed either in recent or fossil plants. Tlie inner set of tap roots vary from two to two and a half inches in length ; the dia- meter at their junction with the base of the trunk being about two inches. The outer set are
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. i ill 1 'iiiii* 1 'â ',m\ ] â ': ''fti , i: â , â¢"â â ' ⢠* â I'M'' 1 â 'i. V\ t 408 Tllli CAUUONIFEROUS SYSTEM. ever been observed either in recent or fossil plants. Tlie inner set of tap roots vary from two to two and a half inches in length ; the dia- meter at their junction with the base of the trunk being about two inches. The outer set are much smaller, being about one inch in dia- meter at their junction with the horizontal roots, and from one to one and a half inch in length. Very few of either set are strictly conical, although they probably were originally of that shape; some are squeezed into an elliptical, others into a triangular form; all have been wrinkled horizontally by the shrinkage due to vertical compression. A thick tuft of broad flattened rootlets radiates from the terminations of the tap roots, and a few indistinct areola; are visible on their sides; the length of these rootlets does not appear to exceed three or four inches, their width being one-fourth of an inch; a raised black line runs down the middle of each, similar to that observed in the rootlets of fStigmaria;. These short thick tap roots were evidently adapted only to a soft wet soil, such as wc may easily conceive was the nature of the first layer of mud deposited upon a bed of peat, which had settled down slightly below the level of the water. " Wc may infer also, from the existence of a layer of shale without fossil plants, immediately over the coal, that the prostrate stems and leaves which occur in such large quantities in the next superincumbent bed, fell from trees growing upon the spot, and were entombed in layers of mud held in suspension in water, which at short intervals inundated the low marshy ground
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
