Class-Book of Geology
Class-Book of Geology
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In our eReader you can find the full English version of the book. Read Class-Book of Geology 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 Class-Book of Geology
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They were composed of a homy or chitinous substance, and hence they commonly present themselves merely as black streaks upon the stone. Each graptolite was a colony comprising many individuals which occupied each its own cell. The cells are in some kinds placed in a row on one side of ^ The fractional numbers inserted within parentheses in the titles of the figures of fossils indicate how much the figures have been reduced or magnified.
Thus ^= reduced one-third ; J = magnified four times, XVII... CAMBRIAN 243 a supporting rod or axis ; in other kinds there is a row of cells on both sides (see Fig. 121). Some varieties are straight, others curved Fig. 116. — Oldhamin radiata (natural sueX Ireland.
or spiral. Some are simple branches, others are composed of two or more branches, while in certain types a large number of separate branches is united in one common centre. One of the most Fig. XX7.— Hydrozoon from the Cambrian rocks {Dtctyograptus {Diciyonema) sociale\ natural size.
ancient hydrozoa is Dictyograptus {Dictyonema^ Fig.
What to read after Class-Book of Geology?
You can find similar books in the "Read Also" column, or choose other free books by Archibald Geikie to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
They were composed of a homy or chitinous substance, and hence they commonly present themselves merely as black streaks upon the stone. Each graptolite was a colony comprising many individuals which occupied each its own cell. The cells are in some kinds placed in a row on one side of ^ The fractional numbers inserted within parentheses in the titles of the figures of fossils indicate how much the figures have been reduced or magnified.
Thus ^= reduced one-third ; J = magnified four times, XVII... CAMBRIAN 243 a supporting rod or axis ; in other kinds there is a row of cells on both sides (see Fig. 121). Some varieties are straight, others curved Fig. 116. — Oldhamin radiata (natural sueX Ireland.
or spiral. Some are simple branches, others are composed of two or more branches, while in certain types a large number of separate branches is united in one common centre. One of the most Fig. XX7.— Hydrozoon from the Cambrian rocks {Dtctyograptus {Diciyonema) sociale\ natural size.
ancient hydrozoa is Dictyograptus {Dictyonema^ Fig.
What to read after Class-Book of Geology?
You can find similar books in the "Read Also" column, or choose other free books by Archibald Geikie to read onlineMoreLess
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