Download Neptune's Ark: From Ichthyosaurs to Orcas by David Rains Wallace PDF

By David Rains Wallace

Writer simply cannot maintain his brain at the topic. it is all rather well to enter the heritage of this or that locate. yet do not drone on and on. i used to be hoping for extra concerning the animals themselves rather than the unhappy tale of whoever stumbled on the bones. if you purchase a publication approximately prehistoric lifestyles you need to know about prehistoric lifestyles. If those paleontologists will not be fossilized i do not need to know that a lot approximately them. i'm certain i will be able to locate their bio somewhere else. i need to grasp how the creature seemed. How great used to be it. What did it consume. What did it do. and so forth and so on and so forth. no longer that the bones have been found via X, obtained or stolen through Y and forgotten by way of every person else. Ellis' e-book is far far better. no less than it sticks to the purpose.

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Neptune's Ark: From Ichthyosaurs to Orcas

Writer simply cannot hold his brain at the topic. it is all rather well to enter the background of this or that locate. yet do not drone on and on. i used to be hoping for extra in regards to the animals themselves rather than the sorrowful tale of whoever found the bones. for those who purchase a ebook approximately prehistoric lifestyles you must find out about prehistoric lifestyles.

Extra resources for Neptune's Ark: From Ichthyosaurs to Orcas

Sample text

They lacked jaws and had mainly cartilaginous internal skeletons. ” More recently, they decided that the sandstone was marine, suggesting that ostracoderms first appeared in the seas. Since the Harding Sandstone is so widely distributed, some parts of it may have been deposited in estuarine as well as marine water. Still, fully freshwater deposits containing ostracoderms are unknown before the early Devonian, so that group probably did evolve in the sea. Yet ostracoderms weren’t the most primitive fish, although the evidence for this was long one of evolution’s mysteries.

North America then was part of a megacontinent, Pangaea, which had formed as crustal movements shoved the planet’s landmasses together. Pangaea’s formation obliterated shallow, warm inland seas that had existed between continents and that had supported the greatest abundance of marine life. It also obliterated most of the fossils of animals that had lived in those seas. The Permian doesn’t seem to have been a particularly auspicious time for a return to the sea. Not only did steep coasts with cold turbulent waters prevail, its last few million years comprised the deadliest interlude the planet has ever known.

In fact, deserts don’t seem likely places for such a development. Modern deserts like California’s, at least, haven’t caused fish to crawl out of drying pools, although many fish lived in large lakes there during the last glaciation. The lakes disappeared so completely that almost the only fish left are minnows like dace and pupfish, and although some pupfish live in water that dries up annually, like Death Valley’s Salt Creek, their response is not to go looking for another creek. Salt Creek is the only water for miles.

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