Cambrian Explosion
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The Cambrian Explosion
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Author : Walter Starkey
language : en
Publisher: Xlibris Corporation
Release Date :
The Cambrian Explosion written by Walter Starkey and has been published by Xlibris Corporation this book supported file pdf, txt, epub, kindle and other format this book has been release on with Science categories.
Cambrian Explosion
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Author : D Erwin
language : en
Publisher: Bedford
Release Date : 2013-01-18
Cambrian Explosion written by D Erwin and has been published by Bedford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-18 with Education categories.
The Cambrian Period records one of the most extraordinary transitions in the history of life. Although animals may have first appeared nearly 700 million years ago, with the earliest sponges, their initial diversifications appear to have been modest until a richly diverse fossil fauna appeared abruptly about 170 million years later. In The Cambrian Explosion, Erwin and Valentine synthesize research from many fields to explain why there was such remarkable novelty of animal forms.
The Cambrian Period
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Author : Charles River
language : en
Publisher:
Release Date : 2020-10-16
The Cambrian Period written by Charles River and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-16 with categories.
*Includes pictures *Includes a bibliography for further reading The early history of Earth covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead, paleontologists and scientists who study geochronology divide time into periods and eras. The current view of science is that Earth is around 4.6 billion years old, and the first 4 billion years of its development are known as the Precambrian period. For the first billion years or so, there was no life in Earth. Then the first single-celled life-forms, early bacteria and algae, began to emerge. It's unclear where they came from or even if they originated on this planet at all, but this gradual development continued until around four billion years ago when suddenly (in geological terms) more complex forms of life began to emerge. Scientists call this time of an explosion of new forms of life the Paleozoic Era, and it stretched from around 541-250 million years ago (Mya). In the oceans and then on land, new creatures and plants began to appear in bewildering variety, and by the end of this period, life on Earth had diversified into a myriad of complex forms that filled virtually every habitat and niche available in the seas and on the planet's only continent, Pangea. Despite all of the scientific advances made in the past few centuries, including an enhanced understanding of Earth's geological past, very little is known about the planet's early history. It is generally accepted that the planet formed somewhere in the region of 4.5 billion years ago, and at some point, the first life appeared in the form of tiny, single-celled creatures, but scientists are unsure of what this life looked like. One of the problems for those seeking to trace the history of life on Earth is that modern scholars are almost entirely dependent on fossil records, but the earliest types of life left few fossils. The best fossils are formed from the bones and hard body parts of dead creatures, but the earliest types of life were so small that they had no bones or cartilage and thus left no fossils. Thus, even though the Precambrian Period (4,600-541 millions of years ago (Mya)) covers over 80% of the entire history of the planet, scientists have very little idea of what forms of life existed then. Then, as Earth entered the Cambrian Period, there was a relatively sudden increase in life form diversity throughout the oceans. Completely new forms of life, more complex and more diverse than anything that had been seen before, began to spread. This acceleration in the evolution of new forms of life was so dramatic that this has come to be known as the "Cambrian explosion." Although new species in the Cambrian explosion developed almost entirely in the oceans, the land was not entirely devoid of life. Though there were no plants or animals, mats of cyanobacteria and other types of microbes covered large terrestrial areas. Scientists have discovered the tracks of a creature that were left in mud that existed 551 Mya, and those tracks were left by leg-like appendages. Was this a fish-like creature that temporarily invaded the land, or was it something completely different than anything that exists today? There is no general consensus, but the Cambrian Period left a rich fossil record that provides a clear idea of the development of life during this time. At the same time, new discoveries are continually being made, and the more scientists discover about this mysterious period, the more their understanding of ancient Earth changes. The Cambrian Period: The History and Legacy of the Start of Complex Life on Earth looks at the development of the era, the extinction event that preceded it, and how life began to evolve during it. Along with pictures depicting important people, places, and events, you will learn about the Cambrian Period like never before.
Life S Great Unfolding The Cambrian Explosion S Legacy
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Author : ChatStick Team
language : en
Publisher: ChatStick Team
Release Date : 2024-03-06
Life S Great Unfolding The Cambrian Explosion S Legacy written by ChatStick Team and has been published by ChatStick Team this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-06 with History categories.
🌊 Embark on a Journey to Earth's Primordial Past with "Life's Great Unfolding: The Cambrian Explosion’s Legacy" 🦠🌏 Dive deep into one of the most fascinating periods in Earth's history with this captivating eBook. Unravel the mysteries of the Cambrian Explosion, a transformative epoch over 500 million years ago that marked a significant turning point in the evolution of life. 🔍 Inside the Book: Pre-Cambrian Prelude: Explore the Earth before the dawn of the Cambrian period and understand the factors leading to this evolutionary milestone. Burst of Life: Witness the rapid emergence of diverse, complex life forms that define the Cambrian seas. Evolutionary Innovations: Discover how new body plans and structures emerged, shaping the future of all complex life. Fossil Chronicles: Traverse the globe to significant fossil sites that provide a window into this ancient world. Ecosystem Dynamics: Delve into the intricate predator-prey relationships and ecological networks of the Cambrian era. Iconic Cambrian Species: Meet the enigmatic creatures of this period, from the peculiar Anomalocaris to other remarkable species. Scientific Breakthroughs: Learn about the modern technological advances that have revolutionized our understanding of the Cambrian period. 📘 Ideal for: History buffs, science enthusiasts, and anyone intrigued by the origins and evolution of life on our planet. 🌐 Experience the Wonders: "The Cambrian Explosion’s Legacy" offers a comprehensive and engaging exploration of this pivotal period. Through vivid descriptions and insights, this book brings to life the extraordinary diversity and complexity of ancient marine ecosystems. 📚 Get Your Copy Today: Delve into the pages of this fascinating eBook and discover the lasting legacy of the Cambrian Explosion on the evolution of life on Earth. A must-read for anyone passionate about the wonders of our natural world!
Epigenetic Mechanisms Of The Cambrian Explosion
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Author : Nelson R Cabej
language : en
Publisher: Academic Press
Release Date : 2019-10-12
Epigenetic Mechanisms Of The Cambrian Explosion written by Nelson R Cabej and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-12 with Science categories.
Epigenetic Mechanisms of the Cambrian Explosion provides readers with a basic biological knowledge and epigenetic explanation of the biological puzzle of the Cambrian explosion, the unprecedented rapid diversification of animals that began 542 million years ago. During an evolutionarily instant of ~10 million years, which represents only 0.3% of the time of existence of life on Earth, or less than 2% of the time of existence of metazoans, all of the 30 extant body plans, major animal groups (phyla) and several extinct groups appeared. The work helps address this phenomena and tries to answer remaining questions for evolutionary biology, epigenetics, and scientific researchers. The book recognizes and presents objective representations of alternative theories for epigenetic evolution in this period, with the author drawing on his epigenetic theory of evolution to explain the causal basis of the Cambrian explosion. Both empirical evidence and theoretical arguments are presented in support of this thought-provoking epigenetic theory. Explains the Cambrian explosion from an entirely epigenetic view Takes a causal rather than descriptive approach to the phenomenon Allows for a broad readership, including those with only a basic biological knowledge, while maintaining scientific rigor
The Cambrian Explosion
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Author : Graham Budd
language : en
Publisher: Wiley-Blackwell
Release Date : 2012-12
The Cambrian Explosion written by Graham Budd and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12 with categories.
International Conference On The Cambrian Explosion
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Author : Paul A. Johnston
language : en
Publisher:
Release Date : 2011
International Conference On The Cambrian Explosion written by Paul A. Johnston and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Science categories.
The Cambrian Explosion
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Author : Graham Budd
language : en
Publisher: John Wiley & Sons
Release Date : 2012-12-01
The Cambrian Explosion written by Graham Budd and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-01 with Paleontology categories.
The Cambrian Explosion
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Author : Society for Integrative and Comparative Biology
language : en
Publisher:
Release Date : 2003
The Cambrian Explosion written by Society for Integrative and Comparative Biology and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Neoproterozoic Cambrian Tectonics Global Change And Evolution
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Author : Claudio Gaucher
language : en
Publisher: Elsevier
Release Date : 2009-10-20
Neoproterozoic Cambrian Tectonics Global Change And Evolution written by Claudio Gaucher and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-10-20 with Science categories.
The book deals with the record of important Neoproterozoic to Early Palaeozoic events in southwestern Gondwana, that heralded the Cambrian explosion and the dawn of modern ecosystems. It contains a detailed account of the Neoproterozoic to Cambrian geological record in a poorly-known part of the world, which is at the same time key to understand fundamental processes at the Proterozoic-Cambrian transition. The emphasis is placed on litho-, bio-, chemostratigraphy and magmatism. The palaeoclimatic, tectonic, evolutionary radiation and extinction events and associated mineralizations will be identified and discussed. A synthesis of all data is provided at the end of the book, integrating the data from all cratons and fold belts in southwestern Gondwana. The events will be individualized, their impact discussed and correlations between different successions both within and outside Gondwana proposed.The book is organized in three sections. Section one is an introduction to the neoproterozoic and Cambrian seen as a time of upheavals, extremes and innovations. Section two comprises nineteen chapters dealing with the neoproterozoic-Cambrian events in southwestern Gondwana. Section three will provide a synthesis on every major topic, and a critical assessment of the global implications of the presented data. The book deals with the record of important Neoproterozoic to Early Palaeozoic events in southwestern Gondwana, that heralded the Cambrian explosion and the dawn of modern ecosystems It contains a detailed account of the Neoproterozoic to Cambrian geological record in a poorly-known part of the world, which is at the same time key to understand fundamental processes at the Proterozoic-Cambrian transition The emphasis is placed on litho-, bio-, chemostratigraphy and magmatism