History of Geology
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In our eReader you can find the full English version of the book. Read History 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 History of Geology
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Marr at the same time pointed out the distinction between the supposed " colonies " and the migrations of species which may cause them to recur in beds of the same great group of strata, but not in distinct systems.
Although a few fossils have been found in rocks of ' Geol. Mag. 1879^ p. i.
io6 OLDER GEOLOGICAL SYSTEMS ELUCIDATED Pre-Cambrian age, as elsewhere noted, it is not until we reach the base of the Cambrian that a clearly- defined fauna is met with.
The earliest fossiliferous stage in ...the Cambrian is characterised by the trilobite Olenellus, described by James Hall in 1862. Some fossils, now regarded as belonging to this zone, were discovered in 1844 in America by Ebenezer Emmons (1799-1863), who has been spoken of as the founder of American PalEeozoic stratigraphy ; but the organic remains were first fully described by C. D. Walcott in his monograph on The Fauna of the Lower Cambrian or Olenellus Zone, issued in 1891.
Writing in 1888,' Professor Lap worth remarked that the Olenellus fauna had been also recognised in Scandi- navia, while its presence in England had been first detected by him on the flanks of Caer Caradoc in 1885, but the specimens were too poor for description.
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To quickly assess the difficulty of the text, read a short excerpt:
Marr at the same time pointed out the distinction between the supposed " colonies " and the migrations of species which may cause them to recur in beds of the same great group of strata, but not in distinct systems.
Although a few fossils have been found in rocks of ' Geol. Mag. 1879^ p. i.
io6 OLDER GEOLOGICAL SYSTEMS ELUCIDATED Pre-Cambrian age, as elsewhere noted, it is not until we reach the base of the Cambrian that a clearly- defined fauna is met with.
The earliest fossiliferous stage in ...the Cambrian is characterised by the trilobite Olenellus, described by James Hall in 1862. Some fossils, now regarded as belonging to this zone, were discovered in 1844 in America by Ebenezer Emmons (1799-1863), who has been spoken of as the founder of American PalEeozoic stratigraphy ; but the organic remains were first fully described by C. D. Walcott in his monograph on The Fauna of the Lower Cambrian or Olenellus Zone, issued in 1891.
Writing in 1888,' Professor Lap worth remarked that the Olenellus fauna had been also recognised in Scandi- navia, while its presence in England had been first detected by him on the flanks of Caer Caradoc in 1885, but the specimens were too poor for description.
What to read after History of Geology?
You can find similar books in the "Read Also" column, or choose other free books by Woodward, Horace B. (Horace Bolingbroke), 1848-1914 to read onlineMoreLess
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