. Specimens of Eozoon canadense and their geological and other relations [microform]. Paleontology; Animal remains (Archaeology); Paléontologie; Restes d'animaux (Archéologie). r, 1 "r 22 Oh Specimens of Eozoon Canadense and part replaced witli dolomite. Such changes are not infre- quent in Faliiozoic fossils in which the substance of a cal- careous pari has often been wholly removed and replaced by another mineral or has been partially eroded and so in part Fig. 7 Longitudinal section of canals, highly magnified. There are other peculiarities deserving -peciai notice:— 1. In s
. Specimens of Eozoon canadense and their geological and other relations [microform]. Paleontology; Animal remains (Archaeology); Paléontologie; Restes d'animaux (Archéologie). r, 1 "r 22 Oh Specimens of Eozoon Canadense and part replaced witli dolomite. Such changes are not infre- quent in Faliiozoic fossils in which the substance of a cal- careous pari has often been wholly removed and replaced by another mineral or has been partially eroded and so in part Fig. 7 Longitudinal section of canals, highly magnified. There are other peculiarities deserving -peciai notice:— 1. In some specimens the serpentine filling the chambers presents a laminated appearance, as if deposited in successive layers. There even occur serpentine-lined cavities and ca- nals with calcai'eous filling. This may depend on the depo- sition of serpentine in coatings on the sides of those cavities, leaving perhaps a central portion to be filled with calcite, or may in some cases be the result of the filling of the cavi- ties with successive lamina' of serpentine from below upward. In either case we have frequent examples of these varieties of filling in ordinaiy fossils. 2. There are examples of Kozoon in which no or other mineral filling appears, and in which the whole mass is calcareous, though presenting canals filled with ser- pentine or dolomite. In these cases the explanation is that the mass of Kozoon has not had its cavities tilled, but has been compressed by pressure into a solid mass. Such a state of preservation is often observed in other fossils, more es- pecially in fossil wood, in which the ceL-walls often become under pressure wholly coalescent. 3. The condition of the propei* wall also illustrates the manner of preservation. The tubes which compose itareso I i. 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
Size: 2304px × 1084px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
