SKU: 55419209039

The Origin of Continents and Oceans

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The Origin of Continents and OceansSince its inception modern geology has been faced with an important group of problems: explaining parallel formations that are separated by great distances of sea; accounting for isolated life forms in widely separated areas (such as lemurs in Madagascar and India); explaining pre pleistocene glaciations, and similar problems. The usual explanation has been to assume the one time existence of land bridges (such as the hypothetical Lemuria) or

Since its inception modern geology has been faced with an important group of problems: explaining parallel formations that are separated by great distances of sea; accounting for isolated life forms in widely separated areas (such as lemurs in Madagascar and India); explaining pre-pleistocene glaciations, and similar problems. The usual explanation has been to assume the one-time existence of land bridges (such as the hypothetical Lemuria) or parallelisms or diffusion with lost intermediary steps.
In 1915, however, one of the most influential and most controversial books in the history of science provided a new solution. This was Alfred Wegener's Entstehung der Kontinente, which dispensed with land bridges and parallel evolutions and offered a more economical concept. Wegener proposed that in the remote past the earth's continents were not separate (as now), but formed one supercontinent which later split apart, the fragments gradually drifting away from one another. Wegener created his supercontinent with attractive simplicity by tucking the point of South America into the Gulf of Guinea, coalescing North America, Greenland, and Europe, rotating Australia and Antarctica up through the Indian Ocean, and closing the remaining gaps. Wegener then explained various phenomena in historical geology, geomorphy, paleontology, paleoclimatology, and similar areas of science in terms of this continental drift. To back up his revolutionary theory he drew upon a seemingly inexhaustible find of data. Later editions of his book added new data to refute his opponents or to strengthen his own views in the violent scientific quarrel that arose.
Even today this important question remains undecided, and geologists are divided into strongly opposed groups about the Wegener hypothesis. At the moment it seems to be gaining steadily in acceptance. It is one of the two basic theories of earth history, and since it has often been misrepresented in summary, every earth scientist owes it to himself to examine its theories and data.



Binding Type: Paperback
Publisher: Dover Publications
Published: 12/14/2011
ISBN: 9780486617084
Pages: 272
Weight: 0.71lbs
Size: 8.50h x 5.50w x 0.58d

Review Citations: Booklist 12/01/1999 pg. 677
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SKU: 55419209039

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rhpatz
Pawtucket, US
★★★★★ 4
Item not quite like the picture.
Color: Barkfast Dog Toy Set
I didn’t realize they were stuffed and not flat.
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Reviewed in the United States on March 23, 2026
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S.Noelle
Lexington, US
★★★★★ 5
Pups all time FAVORITE!
Color: Dim Sum Dumpling Pet Toy Set
Our pups FAVORITE “ball”. He’s obsessed and has a blast with these little dumplings. Small size toy, but our medium labradoodle loooves them. Not to loud of an squaek either. They last quite awhile before he pops the squeaker. Fabric holds up really well.
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Reviewed in the United States on March 13, 2026
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BL
Waukegan, US
★★★★★ 5
Great squeaky fetch toy for small dogs
Color: Dim Sum Dumpling Pet Toy Set
My dog loves these little squeaky dumpling toys. They are the right size for small dogs (under 20 pounds) to chase and fetch, and they have good squeakers inside. They have a friendly look and my dog can fit them in her mouth.
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Reviewed in the United States on January 4, 2026
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Riverady241
Port Orchard, US
★★★★★ 5
Cute toy for small dogs!
Color: Pinata Dog Toy
My dog is obsessed with this toy. This does not have a squeaker in it which is great cuz she doesnt like them. The crinkles and rope seem very durable. She did eat the tail very quickly but overall its held up well! Great tug toy for a small dog or puppy!
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Reviewed in the United States on May 10, 2026
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cynthia
Waukegan, US
★★★★★ 5
Very sturdy dog toy...
Color: Pinata Dog Toy
This doggy toy piñata is so cute my pup loves it. I have a rat terrier, he likes the colors... I really recommend it for all size dogs,
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Reviewed in the United States on March 20, 2026

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