New Reptiles And Stegocephalians From the Upper Triassic of Western Texas
New Reptiles And Stegocephalians From the Upper Triassic of Western Texas
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In our eReader you can find the full English version of the book. Read New Reptiles And Stegocephalians From the Upper Triassic of Western Texas Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book New Reptiles And Stegocephalians From the Upper Triassic of Western Texas
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Near the specimen, and in the same kind of matrix, occur large numbers of fragmentary bones, teeth, and coprolites. This small patch is evidently a bit of an old sand-bar, or an accumulation of sandy clay in some small depression which has been well leached by percolating waters. The relatively small percentage of clay rendered the matrix easily permeable by the waters which converted the iron into limonite and in spots removed it so completely that the matrix is pure white; in other spots the ...matrix is still purple from the unchanged iron of the original deposit. The limonite was con- centrated upon the bones, covering them with a thin scale, and was deposited in the cracks between the pieces of the broken bones. Movements in the ground crushed the skull and broke it into many small pieces which are slightly displaced. The cleaning and restoration were rendered difficult by the distortion and breaking of the bones, but as the fragments were only slightly displaced it was possible to harden the matrix or replace it by plaster cement and work out the original form of the skull.
What to read after New Reptiles And Stegocephalians From the Upper Triassic of Western Texas?
You can find similar books in the "Read Also" column, or choose other free books by E C Ermine Cowles Case to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Near the specimen, and in the same kind of matrix, occur large numbers of fragmentary bones, teeth, and coprolites. This small patch is evidently a bit of an old sand-bar, or an accumulation of sandy clay in some small depression which has been well leached by percolating waters. The relatively small percentage of clay rendered the matrix easily permeable by the waters which converted the iron into limonite and in spots removed it so completely that the matrix is pure white; in other spots the ...matrix is still purple from the unchanged iron of the original deposit. The limonite was con- centrated upon the bones, covering them with a thin scale, and was deposited in the cracks between the pieces of the broken bones. Movements in the ground crushed the skull and broke it into many small pieces which are slightly displaced. The cleaning and restoration were rendered difficult by the distortion and breaking of the bones, but as the fragments were only slightly displaced it was possible to harden the matrix or replace it by plaster cement and work out the original form of the skull.
What to read after New Reptiles And Stegocephalians From the Upper Triassic of Western Texas?
You can find similar books in the "Read Also" column, or choose other free books by E C Ermine Cowles Case to read onlineMoreLess
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