A Second Visit to the United States of North America volume 1 2
A Second Visit to the United States of North America volume 1 2
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In our eReader you can find the full English version of the book. Read A Second Visit to the United States of North America volume 1 2 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 A Second Visit to the United States of North America volume 1 2
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XXXIV. ] NORTHERN DRIFT. 199 drained by the head waters of the Mississippi, Missouri, and their northern tributaries. * For this and other reasons, into which I can not now enter, I presume that the great mass of the most elevated drift in the north, and the glacial grooving and polishing of the rocks, although they belong to a very modern era in the earth's history, were nevertheless anterior in date to the loam of Natchez and Vicksburg.
There exist in Canada, in the Niagara district, in New Y...ork, and other states north of the Ohio, lacustrine and swamp deposits of marl and bog-earth, including the bones of extinct quadrupeds, such as the mastodon, elephant, castoroides, and others, associated with land and fresh-water shells of recent species, which are decidedly post-glacial, and often found in hollows in the drift. These may be of contemporaneous date with the loam of Port Hudson and Natchez.
The northern drift, however, is by no means all of the same age, and as the period of glaciers and icebergs freighted with erratics is still going on, and has now a wide range in the tem- perate parts of the Atlantic, bordering the eastern shores of North America, so must we naturally suppose that certain parts of the drift, especially those found at lower levels, and near the sea, may not be more ancient than the loam of the western bluffs of the Mississippi.
What to read after A Second Visit to the United States of North America volume 1 2?
You can find similar books in the "Read Also" column, or choose other free books by Charles Lyell to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
XXXIV. ] NORTHERN DRIFT. 199 drained by the head waters of the Mississippi, Missouri, and their northern tributaries. * For this and other reasons, into which I can not now enter, I presume that the great mass of the most elevated drift in the north, and the glacial grooving and polishing of the rocks, although they belong to a very modern era in the earth's history, were nevertheless anterior in date to the loam of Natchez and Vicksburg.
There exist in Canada, in the Niagara district, in New Y...ork, and other states north of the Ohio, lacustrine and swamp deposits of marl and bog-earth, including the bones of extinct quadrupeds, such as the mastodon, elephant, castoroides, and others, associated with land and fresh-water shells of recent species, which are decidedly post-glacial, and often found in hollows in the drift. These may be of contemporaneous date with the loam of Port Hudson and Natchez.
The northern drift, however, is by no means all of the same age, and as the period of glaciers and icebergs freighted with erratics is still going on, and has now a wide range in the tem- perate parts of the Atlantic, bordering the eastern shores of North America, so must we naturally suppose that certain parts of the drift, especially those found at lower levels, and near the sea, may not be more ancient than the loam of the western bluffs of the Mississippi.
What to read after A Second Visit to the United States of North America volume 1 2?
You can find similar books in the "Read Also" column, or choose other free books by Charles Lyell to read onlineMoreLess
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