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Search results for: palaeontolog* in all categories
140 results found.
14 pages of results.
11. Focus [SIS C&C Workshop $]
... correlated the dates of known extinctions of species on Earth and concluded that mass extinctions have taken place with a regular periodicity of 26 million years. The improbability of regular periodicity of any kind being a function of biological evolution itself led them to suspect an extraterrestrial cause. Palaeontologists are not agreed on the role of outside influences on extinctions or the mode and rate of evolution. Some still hold fast to a Darwinian gradualistic model influenced only by slow geological and climatic changes, but there is a growing following for the punctuated equilibrium model of ... in the following years". None were taken seriously however, as followers of Velikovsky well know, until publication of the hard facts of the Alvarez work on the iridium enrichment at the Cretaceous/Tertiary boundary. Once catastrophism began to look respectable in the geological and palaeontological disciplines then the astronomers apparently felt free to jump on the bandwagon. But has anything really changed? The now acceptable geological catastrophes are dated in millions of years- not thousands- and the astronomers have repeatedly given free reign to their imaginations in the form of ...
12. Catastrophist Geology Year 2, No 1 [Catastrophism Geology $]
... what catastrophist geology is about? does it focus on subjects neglected or tabooed in the mainstream geological journals? Cover design based on engravngs of mammoths in Font de Gaume cave, Dordogne, France. In forthcoming Issue Otto H. Schindewolf (1896-1971) on catastrophism in palaeontology L.I. Salop on glaciation and crises in evolution Haroun Tazieff on the formation of guyots Pietro Passerini on knowledge and entropy Peter Chadwick on creativeity in geology TEMPORARY CHANGE OF ADDRESS From the middle of December 1977 to the middle of March 1978 1 can be reached at ... Hull/Great Britain Peter Gretener geophysicist Calgary/Canada Peter Chadwick geologist/psychologist Glasgow/Gr.Britain Board of advisors: V.Axel Firsoff astronomer Glastonbury/Gr.Britain Horace C.Dudley physicist Chicago/ USA Manoel Nunes Pereira anthropologist Rio de Janeiro Correspondents: Ewoud H.Bon exploration geologist Amsterdam David J.Thomas palaeontologist Oswego USA G.W.van Oosterhout chemist Delft Holland John M.Cubitt mathematical geologist Syracuse/ USA Robert van Everdingen hydrogeologist Calgary/Canada In evaluating an MS submitted for publication the following criteria are used, separately or together: does it study discontinuities in Earth history? does it clarify ...
13. Scorpion Fossils: An Enigma [Aeon Journal $]
... From: Aeon V:3 (Dec 1998) Home¦ Issue Contents News Flash Scorpion Fossils: An Enigma Tania ta Maria Two close-to-perfect scorpion fossils, complete with claws and stingers, showed up in blocks of building stone sold to contractors in Ontario, Canada. Palaeontologists from the Royal Ontario Museum (ROM), in Toronto, traced the blocks to a quarry in the Bruce Peninsula where another fossil was discovered by a quarry worker. A fourth showed up among the exhibits at the visitors' centre in Fathom Five National Park ... have been the marine ancestors of scorpions. But what were land scorpions doing in the same marine formation? According to the experts, southern Ontario had been a tropical region of shallow lagoons which, 420 million years ago, straddled the equator. Janet Waddington, a palaeontologist from the ROM, has stated that the stones containing the fossils in question were laid down in these calm shallow waters between coral reefs. But whether the scorpions themselves lived on land, in these shallow lagoons, or moved about between sea and shore, is ...
14. Monitor [SIS C&C Workshop $]
... in his article and the subsequent letters, it becomes obvious that the truth, as so often, lies somewhere between the two extremes. One letter in particular (G. K. Gray, Manchester) sums it up very well, pointing out that not all palaeontologists follow Halstead's belief in evolution as 'a development through a continuum', but instead that 'biological evolution is not continuous but is quantised'- which is 'a logical consequence of modern genetic theory'. A catastrophist view of evolution is the perfect meeting point for the ... to be disconcerting and difficult to explain away:- that excess iridium, osmium, etc.! NOT SCIENTIFIC- New Scientist, 17/7/80, p. 215 Jill Abery writes to tell us of an article by Dr. Beverly Halstead, defending palaeontology and the concept of Darwinian evolution against the charge that the latter is not a scientific theory but a metaphysical one. This gave rise to a page of letters (31/7/80 p.402). Halstead, representing one extreme of uniformitarian Darwinism, was ...
15. Monitor [SIS C&C Workshop $]
... temperature is greater in the cold-blooded reptile, like the alligator, and reptiles have ancestry more ancient than dinosaurs. The reptiles ought to have died out first as a result of such temperature variations. Another Missing Link Bites the Dust source: New Scientist 27.5.82, p.572 Palaeontologists have a penchant for building up images of ancestral types or "missing links" from a few bones or teeth (see elsewhere this issue- "Mammals Had a False Start"). Thus Diacodexis, a rabbit-sized mammal which lived in the early Eocene, ... datings from outside Africa of greater than 1 million years have been dismissed as dubious, although examples have been increasing. Remains from eastern Java could be up to 1.9 million years old, and from Yunnan province in China 1.5 to 1.7 million years old. A Yugoslav palaeontologist believes the human fossils and tools found in northern Yugoslavia in a cave could be close to 2 million years old. Within Africa itself a skull found in Kenya appears to predate material from Olduvai, which is 800 km further south. A few authors think that ...
16. Monitor [SIS C&C Workshop $]
... whose interaction with the Oort cloud of comets might cause periodic havoc in the Solar System. Now NATURE seems to have backed down on the idea. New calculations show that the orbit of Nemesis would not be stable, the cometary orbits do not fit, and the palaeontological record of major extinctions does not show the right periodicity! Another Iridium Extinction source: SCIENCE 226, p.437 Yet another anomalously high concentration of iridium has been found- in sedimentary rocks of the Canning Basin in NW Australia, dated to c.365 Myr ago and coinciding ... , but by comets, regular showers of which descend upon Earth as an effect of a hitherto unknown companion star to the Sun (see WORKSHOP 6:1, pp.3-5). If the idea is correct Gould will "be so pleased" because his science of palaeontology "will have been directly responsible for inciting the greatest revision of cosmology in our space of the Universe since Galileo." William Corliss, reporting on Gould's similar conclusion after a study of pre-Cambrian life forms ('The Ediacaran Experiment') also comments with some surprise: ...
17. Reviews [SIS C&C Workshop $]
... the low-browsers of the Cretaceous, these co-evolving with the flowers they ate. One might have expected Bakker to have looked for an extraordinary explanation for the eventual total extinction of these supremely well-established creatures at the end of the Cretaceous. However, in common with many other palaeontologists, he is more than happy to settle for the draining of shallow seas as the main cause, allowing previously separated species to mix, with unpredictable consequences. According to Bakker, the problem for the dinosaurs was that, before this happened, a few species ... with changing circumstances. An extraterrestrial impact may well have occurred at this time, but too late to have had any significant effect on events already taking place. Another evolutionary biologist, David Raup, vigorously disagrees with this conclusion. The two are very different types of palaeontologist: Bakker spends months every year in the field, searching for fossils, whereas Raup researches mainly at the controls of his computer in the University of Chicago. Nevertheless, despite never having described or named a new fossil species, Raup has been President of the ...
18. Darwinism, darwin,talk.origins,talk-origins,talk origins, darwinism, darwinist, neodarwinism, neo-darwinism,neodarwinist, evolution,natural selection,genetic mutation,on the origin of species,origin of species, descent of man,survival of the fittest,evolutionary biology, human evolution, evolutionary theory, theory of evolution,adaptive radiation,punctuated equilibrium,dna,DNA,developmental biology, progressive evolution [Alternative Science Website]
... have been measured by history, and have been ultimately found to be inadequate tools of explanation. Unlike Marx and Freud, Darwin himself remains esteemed both as a highly original thinker and as a careful researcher (his study of fossil barnacles remains a text book example for palaeontologists). But the theory that bears his name was transformed in the early years of this century into the mechanistic, reductionist theory of neo-Darwinism: the theory that living creatures are machines whose only goal is genetic replication-- a matter of chemistry and statistics; ... a small dog-like creature in the Eocene period 50 million years ago, to "Mesohippus", a sheep-sized animal of 30 million years ago, eventually to "Dinohippus", the size of a Shetland pony. This chart was drawn in 1950 by Harvard's professor of palaeontology George Simpson, to accompany his standard text book, Horses, which encapsulated all the research done by the American Museum of Natural History in the previous half century. Simpson plainly believed that his evidence was incontrovertible because he wrote, 'The history of the horse family ...
19. The Cautious Revolutionary [SIS C&C Review $]
... material or of release from the Earth's core by vulcanism. To find a relative abundance in the same layer at sites scattered around the world is evidence of a large impact or of widespread vulcanism. The Alvarez paper suddenly made theories of extraterrestrial catastrophism respectable amongst geologists and palaeontologists. Not only Gould but many others began to take the idea seriously [16. In October 1981, the Geological Society of America, with support from the National Academy of Sciences and NASA, organised a meeting at Snowbird, Utah, to discuss the implications ... London: Norton, 1985) The essays of Stephen Jay Gould, which have appeared monthly in Natural History since 1974, have a deserved reputation for sparkle, perception, controversy and common sense. Gould is on the faculty of Harvard University, and is primarily a palaeontologist and evolutionary biologist, although he also teaches geology and the history of science. For relaxation he sings baritone with the Boston Cecilia Society, and has a liking for Gilbert and Sullivan as well as for Bach. His essays, collectively entitled "This View of ...
20. Controversy: Catastrophism and Evolution, The Ongoing Debate, by Trevor Palmer (Review) [SIS C&C Review $]
... of a mass extinction. A mass extinction is the net loss of unusually many species. It may arise through an increase in the extinction rate, which is what the fossil record suggests happens, but a decrease in the speciation rate would have the same effect. Palaeontologists recognise that, at times in Earth history, global biodiversity has fallen far enough and fast enough to call for the name 'mass extinction'. Five major episodes of mass extinction occur in the Phanerozoic record- at the close of the Ordovician, during the late ... hierarchy, speciation (the creation of new species) is seen as a fast or a slow process, depending on one's evolutionary beliefs. In the societary hierarchy, mass extinctions (biotic crises) are seen as fast or slow events, depending how one interprets the palaeontological evidence. The point is that the catastrophism-gradualism debate is couched in different terms for individual species (speciation events) and for the entire biosphere (mass extinctions) but this distinction is not clear in Palmer's book. I would like to discuss two other issues, ...
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