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Determinations of the age of the Earth as 4.54 ± 0.05 billion years (Ga) leave large part of its earliest history unknown. Isotopic and geochemical signatures in rocks as old as ~4.0 Ga indicate an evolutionary trend from mafic-ultramafic crust to tonalite-trondhjemite-granodiorite (TTG)-dominated micro continental nuclei. To date signatures of the 3.95 – 3.85 Ga Late heavy Bombardment (LHB), manifested by the lunar Mare, have not been discovered on Earth. Recent discoveries of near to 14 Archaean impact ejecta units up to 3.48 Ga-old intercalated with volcanic and sedimentary rocks in the Barberton and Pilbara greenstone belts, including clusters about 3.25 – 3.22 Ga and 2.63 – 2.48 Ga in age, may represent terrestrial vestiges of an extended LHB. The interval of ~3.25 – 3.22 Ga-ago emerges as a major break in Archaean crustal evolution when major asteroid bombardment resulted in faulting, large scale uplift, intrusion of granites and an abrupt shift from crustal conditions dominated by mafic-ultramafic crust associated with emplacement of TTG plutons, to semi-continental nuclei represented by arenites, turbidites, conglomerate, banded iron formations and felsic volcanics. At this stage pre-3.2 Ga dome-structured granite-greenstone systems were largely replaced by linear accretional granite-greenstone systems such as the Superior Province in Canada, Yilgarn Craton and the western Pilbara Craton, compared by some authors to circum-Pacific arc-trench settings. A fundamental geotectonic transformation is consistent with the increasing role of garnet fractionation as indicated by Al-depleted and plagioclase-enriched magmatic compositions, suggesting cooler high P/T (pressure/temperature) mantle and crustal magma sources, consistent with development of subduction. A concentration of large impacts during 2.63 – 2.48 Ga potentially accounts for peak magmatic events culminating the Archaean era. However, strict comparisons between the Archaean systems and modern Arc-trench geotectonic setting will be shown to be unwarranted. The book provides an excursion through granite-greenstone terrains, and to a lesser extent high-grade metamorphic terrains, focusing on relic primary features including volcanic, sedimentary, petrological, geochemical and paleontological elements, with the aim of elucidating the nature of original environments and processes which dominated environments in which early life forms have emerged. By contrast to uniformitarian models, which take little or no account of repeated impacts of large asteroid clusters and their effects during ~3.47 – 2.48 Ga, the Archaean geological record is consistent with the theory of asteroid impact-triggered volcanic activity originally advanced by D.H. Green in 1972 and 1981.
Geology, Stratigraphic --- Archaean --- Archaeozoic --- Archean --- Archeozoic --- Geochemistry. --- Planetology. --- Sedimentology. --- Earth System Sciences. --- Petrology --- Planetary sciences --- Planetology --- Chemical composition of the earth --- Chemical geology --- Geological chemistry --- Geology, Chemical --- Chemistry --- Earth sciences --- Physical geography. --- Geography
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Unique among all creatures, further to the increase in its cranial volume from Australopithecus to Homo sapiens, the use of tools and cultural and scientific creativity, the genus Homo is distinguished by the mastery of fire, which since about two million years ago has become its blueprint. Through the Holocene and culminating in the Anthropocene, the burning of much of the terrestrial vegetation, excavation and combustion of fossil carbon from up to 420 million years-old biospheres, are leading to a global oxidation event on a geological scale, a rise in entropy in nature and the sixth mass extinction of species.
Climatic changes. --- Human ecology. --- Ecology --- Environment, Human --- Human beings --- Human environment --- Changes, Climatic --- Climate change --- Climate changes --- Climate variations --- Climatic change --- Climatic changes --- Climatic fluctuations --- Climatic variations --- Global climate changes --- Global climatic changes --- Social aspects --- Environmental aspects --- Earth sciences. --- Climate change. --- Physical geography. --- Anthropology. --- Archaeology. --- Human geography. --- Earth Sciences. --- Earth System Sciences. --- Climate Change/Climate Change Impacts. --- Human Geography. --- Ecological engineering --- Human geography --- Nature --- Climatology --- Climate change mitigation --- Teleconnections (Climatology) --- Effect of environment on --- Effect of human beings on --- Changes in climate --- Climate change science --- Anthropo-geography --- Anthropogeography --- Geographical distribution of humans --- Social geography --- Anthropology --- Geography --- Human ecology --- Archeology --- Auxiliary sciences of history --- History --- Antiquities --- Global environmental change --- Primitive societies --- Social sciences
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The permutation of basic atoms—nitrogen, hydrogen, oxygen, carbon and phosphorus―into the biomolecules DNA and RNA, subsequently evolved in cells and brains, defining the origin of life and intelligence, remains unexplained. Equally the origin of the genetic information and the intertwined nature of ‘hardware’ and ‘software’ involved in the evolution of bio-molecules and the cells are shrouded in mystery. This treatise aims at exploring individual and swarm behaviour patterns which potentially hint at as yet unknown biological principles. It reviews theories of evolution with perspectives from the earth sciences, commencing with the earliest observed records of life. This is followed by reviews and discussion of the building blocks of life, marine and terrestrial communities, the arthropods, birds and finally humans. It is suggested that, further to the mutation/natural selection processes established by Darwin and Wallace, an understanding of the evolution of intelligence remains little understood. A directionality of evolutionary trajectories is evident, not least the purposeful thinking process of humans as well as animals. It is not clear how directional intelligence, manifested for example by the collective intelligence of arthropod colonies, has evolved from mutation/natural selection processes. Potential clues for the understanding of life and evolution are provided by Aristotle’s dictum of “the whole being greater than the sum of the parts”, Niels Bohr’s principle of quantum complementarity and George Ellis’ theory of top-down causality. Inherent in the question of the origin of life is an anthropocentric bias, related to the self-referential Anthropic Principle and theological paradigms of man’s supposed dominion over all other species. The Anthropic Principle, however, should be capable of being circumvented using the scientific falsification method, assuming universal verified constants of physics. The phenomenon of the human mastery of fire and the splitting of the atom, leading to the seventh major mass extinction of species, remains incomprehensible. .
Life. --- Life --- Philosophy --- Biology-Philosophy. --- Astrobiology. --- Paleontology . --- Evolution (Biology). --- Philosophy of Biology. --- Biogeosciences. --- Paleontology. --- Evolutionary Biology. --- Animal evolution --- Animals --- Biological evolution --- Darwinism --- Evolutionary biology --- Evolutionary science --- Origin of species --- Biology --- Evolution --- Biological fitness --- Homoplasy --- Natural selection --- Phylogeny --- Fossilogy --- Fossilology --- Palaeontology --- Paleontology, Zoological --- Paleozoology --- Historical geology --- Zoology --- Fossils --- Prehistoric animals in motion pictures --- Astrobiology --- Habitable planets --- Origin --- Biology—Philosophy. --- Geobiology. --- Evolutionary biology. --- Earth sciences --- Biosphere
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Determinations of the age of the Earth as 4.54 ± 0.05 billion years (Ga) leave large part of its earliest history unknown. Isotopic and geochemical signatures in rocks as old as ~4.0 Ga indicate an evolutionary trend from mafic-ultramafic crust to tonalite-trondhjemite-granodiorite (TTG)-dominated micro continental nuclei. To date signatures of the 3.95 – 3.85 Ga Late heavy Bombardment (LHB), manifested by the lunar Mare, have not been discovered on Earth. Recent discoveries of near to 14 Archaean impact ejecta units up to 3.48 Ga-old intercalated with volcanic and sedimentary rocks in the Barberton and Pilbara greenstone belts, including clusters about 3.25 – 3.22 Ga and 2.63 – 2.48 Ga in age, may represent terrestrial vestiges of an extended LHB. The interval of ~3.25 – 3.22 Ga-ago emerges as a major break in Archaean crustal evolution when major asteroid bombardment resulted in faulting, large scale uplift, intrusion of granites and an abrupt shift from crustal conditions dominated by mafic-ultramafic crust associated with emplacement of TTG plutons, to semi-continental nuclei represented by arenites, turbidites, conglomerate, banded iron formations and felsic volcanics. At this stage pre-3.2 Ga dome-structured granite-greenstone systems were largely replaced by linear accretional granite-greenstone systems such as the Superior Province in Canada, Yilgarn Craton and the western Pilbara Craton, compared by some authors to circum-Pacific arc-trench settings. A fundamental geotectonic transformation is consistent with the increasing role of garnet fractionation as indicated by Al-depleted and plagioclase-enriched magmatic compositions, suggesting cooler high P/T (pressure/temperature) mantle and crustal magma sources, consistent with development of subduction. A concentration of large impacts during 2.63 – 2.48 Ga potentially accounts for peak magmatic events culminating the Archaean era. However, strict comparisons between the Archaean systems and modern Arc-trench geotectonic setting will be shown to be unwarranted. The book provides an excursion through granite-greenstone terrains, and to a lesser extent high-grade metamorphic terrains, focusing on relic primary features including volcanic, sedimentary, petrological, geochemical and paleontological elements, with the aim of elucidating the nature of original environments and processes which dominated environments in which early life forms have emerged. By contrast to uniformitarian models, which take little or no account of repeated impacts of large asteroid clusters and their effects during ~3.47 – 2.48 Ga, the Archaean geological record is consistent with the theory of asteroid impact-triggered volcanic activity originally advanced by D.H. Green in 1972 and 1981.
Solar system --- Geochemistry --- Geology. Earth sciences --- Geography --- geochemie --- zonnestelsel --- sedimenten --- sedimentatie --- groene chemie --- geografie --- planeten
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When in 1981 Louis and Walter Alvarez, the father and son team, unearthed a tell-tale Iridium-rich sedimentary horizon at the 65 million years-old Cretaceous-Tertiary boundary at Gubbio, Italy, their find heralded a paradigm shift in the study of terrestrial evolution. Since the 1980s the discovery and study of asteroid impact ejecta in the oldest well-preserved terrains of Western Australia and South Africa, by Don Lowe, Gary Byerly, Bruce Simonson, the author and others, and the documentation of new exposed and buried impact structures in several continents, led to a resurgence of the idea of the catastrophism theory of Cuvier, earlier largely supplanted by the uniformitarian theory of Hutton and Lyell. Several mass extinction of species events are known to have occurred in temporal proximity to large asteroid impacts, global volcanic eruptions and continental splitting. Likely links are observed between asteroid clusters and at 580 Ma, end-Devonian, end-Triassic and end-Jurassic extinctions. New discoveries of ~3.5 Ga-old impact fallout units in South Africa have led Lowe and Byerly to propose a protracted continuation of the Late Heavy Bombardment (~3.95-3.85 Ga) in the Earth-Moon system. Given the difficulty in identifying asteroid impact ejecta units and buried impact structures, it is likely new discoveries of impact signatures are in store, which would further profoundly alter models of terrestrial evolution.
Space research --- Solar system --- Astrophysics --- Meteorology. Climatology --- Geology. Earth sciences --- Geography --- zonnestelsel --- astrofysica --- geografie --- planeten --- ruimtevaart --- atmosfeer --- Australia
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Unique among all creatures, further to the increase in its cranial volume from Australopithecus to Homo sapiens, the use of tools and cultural and scientific creativity, the genus Homo is distinguished by the mastery of fire, which since about two million years ago has become its blueprint. Through the Holocene and culminating in the Anthropocene, the burning of much of the terrestrial vegetation, excavation and combustion of fossil carbon from up to 420 million years-old biospheres, are leading to a global oxidation event on a geological scale, a rise in entropy in nature and the sixth mass extinction of species.
Ethnology. Cultural anthropology --- Meteorology. Climatology --- Geology. Earth sciences --- Environmental planning --- Social geography --- Geography --- Archeology --- ruimtelijke ordening --- creativiteit --- geografie --- archeologie --- klimaatverandering
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The permutation of basic atoms—nitrogen, hydrogen, oxygen, carbon and phosphorus―into the biomolecules DNA and RNA, subsequently evolved in cells and brains, defining the origin of life and intelligence, remains unexplained. Equally the origin of the genetic information and the intertwined nature of ‘hardware’ and ‘software’ involved in the evolution of bio-molecules and the cells are shrouded in mystery. This treatise aims at exploring individual and swarm behaviour patterns which potentially hint at as yet unknown biological principles. It reviews theories of evolution with perspectives from the earth sciences, commencing with the earliest observed records of life. This is followed by reviews and discussion of the building blocks of life, marine and terrestrial communities, the arthropods, birds and finally humans. It is suggested that, further to the mutation/natural selection processes established by Darwin and Wallace, an understanding of the evolution of intelligence remains little understood. A directionality of evolutionary trajectories is evident, not least the purposeful thinking process of humans as well as animals. It is not clear how directional intelligence, manifested for example by the collective intelligence of arthropod colonies, has evolved from mutation/natural selection processes. Potential clues for the understanding of life and evolution are provided by Aristotle’s dictum of “the whole being greater than the sum of the parts”, Niels Bohr’s principle of quantum complementarity and George Ellis’ theory of top-down causality. Inherent in the question of the origin of life is an anthropocentric bias, related to the self-referential Anthropic Principle and theological paradigms of man’s supposed dominion over all other species. The Anthropic Principle, however, should be capable of being circumvented using the scientific falsification method, assuming universal verified constants of physics. The phenomenon of the human mastery of fire and the splitting of the atom, leading to the seventh major mass extinction of species, remains incomprehensible. .
Philosophy --- General palaeontology --- Biogeography --- Evolution. Phylogeny --- Biology --- Biological anthropology. Palaeoanthropology --- biogeografie --- biologie --- filosofie --- Europees recht --- evolutieleer --- ruimte (astronomie) --- paleontologie --- moleculaire biologie
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With the advent of global warming and the nuclear arms race, humans are rapidly approaching a moment of truth. Technologically supreme, they manifest their dreams and nightmares in the real world through science, art, adventures and brutal wars, a paradox symbolized by a candle lighting the dark yet burning away to extinction, as discussed in this book. As these lines are being written, fires are burning on several continents, the Earth's ice sheets are melting and the oceans are rising, threatening to flood the planet's coastal zones and river valleys, where civilization arose and humans live and grow food. With the exception of birds like hawks, black kites and fire raptors, humans are the only life form utilizing fire, creating developments they can hardly control. For more than a million years, gathered around campfires during the long nights, mesmerized by the flickering life-like dance of the flames, prehistoric humans acquired imagination, a yearning for omnipotence, premonitions of death, cravings for immortality and conceiving the supernatural. Humans live in realms of perceptions, dreams, myths and legends, in denial of critical facts, waking up for a brief moment to witness a world that is as beautiful as it is cruel. Existentialist philosophy offers a way of coping with the unthinkable. Looking into the future produces fear, an instinctive response that can obsess the human mind and create a conflict between the intuitive reptilian brain and the growing neocortex, with dire consequences. As contrasted with Stapledon's Last and first Man, where an advanced human species mourns the fate of the Earth, Homo sapiens continues to transfer every extractable molecule of carbon from the Earth to the atmosphere, the lungs of the biosphere, ensuring the demise of the planetary life support system.".
Philosophy of science --- Meteorology. Climatology --- Geology. Earth sciences --- wetenschapsfilosofie --- geografie --- geologie --- aarde (astronomie) --- klimaatverandering
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This book presents a history which is nearing its nadir, where a species of warlike primates is destroying the delicate web of life perceived by Charles Darwin in The Origin of Species, committing a war against nature and the fastest mass extinction in the history of nature, with global temperatures incinerating the biosphere by several degrees Celsius, within a lifetime. Despite of this knowledge, Homo "sapiens" is proceeding to transfer every accessible molecule of carbon from the Earth crust to the atmosphere and hydrosphere, an auto-da-fe ensues of the terrestrial biosphere. As amplifying feedbacks to global warming-including fires, methane release, ice melt, and warming oceans-are intensifying, at a pace exceeding any recorded in the geological past, societies are pouring their remaining resources into wars. These include likely nuclear wars triggered by arsenals many thousands of missiles strong, posing an equal threat to human existence and that of many other species. Humans, having mastered fire, which allowed them to survive the extreme ice ages, have emerged in the current interglacial as major civilizations coupled with major bloodsheds, called "war", engulfing multitudes of innocent yet betrayed humans. Long suffering from illusions of omnipotence and omniscience, paranoid fears, a warlike mindset, aggression toward the animals and disrespect of females, coupled with artistic excellence and technical brilliance, humans have become victims to a tragic conflict between the mind and the heart, with fatal consequences. .
Meteorology. Climatology --- Geology. Earth sciences --- klimatologie --- geografie --- geologie --- aarde (astronomie)
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This book presents a comprehensive overview of Australian impact structures and related mineralization, including a discussion of the significance of many of these structures for crustal evolution. The book focuses in particular on Archaean impact ejecta/fallout units in the Pilbara Craton of Western Australia, large exposed and buried impact structures, and on the geophysical evidence for possible to probable impact structures. Thanks to their long-term geological stability, Precambrian and younger terrains in the Australian continent contain 38 confirmed impact structures and 43 ring and dome structures, many of which constitute possible to probable asteroid impact structures. The impact structures have been the subject of more than half a century of studies and range from several tens of meter-large craters to buried structures larger than 100 km in diameter. Discoveries of impact fallout units in the Pilbara Craton have defined the Pilbara as one of the two best documented terrains where Archaean impact ejecta/fallout deposits are identified, the other terrain being the Kaapvaal Craton in southern Africa. A synthesis of evidence from both cratons indicates periods of large asteroid bombardments during ~3.47 – 2.48 billion years-ago, including peak bombardment about 3.25—3.22 billion years-ago. The latter period coincides with an abrupt transformation of an early Archaean granite-greenstone crust to mid to late Archaean semi-continental crustal regimes, underpinning the significance of heavy asteroid impact events for crustal evolution. Apart from proven impact structures, Australian terrains display a range of circular features, including morphological and drainage rings, circular lakes, volcanic craters, tectonic domes, oval granite bodies, mafic igneous plugs, salt diapirs, and magnetic, gravity and seismic anomalies, many of which are of a likely impact origin. Thermal and hydrothermal processes associated with impact cratering bear important consequences for the formation of mineral deposits, such as Ni at Sudbury, Pb-Zn at Siljan and Kentland. Impact structures may also provide sites for the accumulation of hydrocarbons, whereas in some instances fracturing associated with impact structures allows outward migration of oil and gas.
Earth sciences. --- Economic geology. --- Structural geology. --- Planetology. --- Physical geography. --- Earth Sciences. --- Earth System Sciences. --- Structural Geology. --- Economic Geology. --- Geology, Structural --- Geotectonics --- Structural geology --- Tectonics (Geology) --- Physical geology --- Geology, Structural. --- Geology, economic. --- Economic geology --- Mines and mineral resources --- Planetary sciences --- Planetology --- Impact craters --- Cryptoexplosion structures --- Meteorite craters --- Metallogeny --- Geology, Stratigraphic --- Geography --- Impact craters - Australia --- Cryptoexplosion structures - Australia --- Meteorite craters - Australia --- Geology, Structural - Australia --- Metallogeny - Australia
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