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portada The West Indian Bridge between North and South America
Type
Physical Book
Author
Publisher
Language
English
Pages
88
Format
Paperback
Dimensions
20.3x12.7x0.5 cm
Weight
0.10 kg.
ISBN13
9781986927260
Categories

The West Indian Bridge between North and South America

Joseph William Spencer (Author) · Createspace · Paperback

The West Indian Bridge between North and South America - Spencer, Joseph William

New Book Imported to South Africa
Delivery: 06 Oct - 19 Oct Shipping: 17 to 21 business days.
R 316
R 316

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Synopsis "The West Indian Bridge between North and South America"

A glance at a map of the American continent, inclosing the West Indian seas within its mass, suggests that these basins are sunken plains, submerged to only a moderate extent, but the soundings show depths reaching to more than three miles. "It is not too much to say that every spot which is now dry land has been sea at some former period, and every part of space now covered by the deepest oceans has been land." This enunciation still held place among the latest writings of the great geological teacher - Sir Charles Lyell. As the earlier geologists had not the means of measuring the amount of terrestrial movements, the doctrine of mutability of continents and seas, as taught by Lyell, was doubted by many who later substituted the hypothesis of their permanency from the most remote times, although subjected to ceaseless changes of form. The hypothesis of permanency of continents and seas was largely based upon the littoral character of sedimentary formations, although the evidence of the abysmal or oceanic origin of the widespread chalk deposits could not be easily disposed of. Again, the development and distribution of animal and plant life have been skillfully used as evidence against certain great changes in insular and continental connections, beyond limited proportions. The amount of the concession has varied greatly among the different advocates, so that even under the general hypothesis of permanency, the configuration of the West Indian region has undergone great changes, yet not sufficient to bridge over the seas between the two Americas...

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