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  • Articles  (37)
  • Springer  (28)
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  • 1990-1994  (37)
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  • 1
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    Journal of the history of biology 26 (1993), S. 571-587 
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    Journal of the history of biology 26 (1993), S. 545-569 
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    Notes: Conclusion In struggling to free science from theological implications, Huxley let his own philosophical beliefs influence his interpretation of the data. However, he was certainly not unique in this respect. Like the creationists he despised, he made many important contributions to the issue of progression in the fossil record and its relationship to evolutionary theory. Certainly other factors were involved as well. Undoubtedly, just the sheer inertia of ideas played a role. He was committed to a theory of type and was heavily influenced by von Baer, who argued that one could not rate the different types as being higher or lower than the others. By the mid-1850s his animosity toward Owen had become extreme and he tried to discredit the man whenever possible; yet, as I have pointed out, he also was more than willing to cite Owen's early work when it suited his needs. But I believe the crucial factor in Huxley's eventually accepting progression was that he finally disassociated it from the idea of divine plan. This happened gradually through the 1860s and 1870s, as more and more fossil finds provided support for Darwin's theory. In evaluating this new evidence that supported gradualism, Huxley also realized that progression was an intrinsic part of Darwin's theory: The hypothesis of evolution supposes that at any given period in the past we should meet with a state of things more or less similar to the present, but less similar in proportion as we go back in time... if we traced back the animal world and the vegetable world we should find preceding what now exist animals and plants not identical with them, but like them, only increasing their differences as we go back in time, and at the same time becoming simpler and simpler until finally we should arrive at that gelatinous mass which, so far as our present knowledge goes, is the common foundation of all life. In concluding his first lecture to the Americans, he told them: “The hypothesis of evolution supposes that in all this vast progression there would be no breach of continuity, no point at which we could say ‘This is a natural process,’ and ‘This is not a natural process.’”85 Finally for Huxley, progression was no longer linked to Divine Plan.
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  • 3
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    Journal of the history of biology 26 (1993), S. 1-38 
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  • 4
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    Journal of the history of biology 26 (1993), S. 65-87 
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    Topics: Biology , History
    Notes: Conclusion If the work carried out to gain a detailed understanding of the process of photosynthesis, and probably other types of bioenergetic conversions as well, fulfills the criteria of a molecular biology, and if the groups funding this research and those who worked in the laboratory regarded it as such, why has it been necessary for me to argue here that bioenergetics should always have been counted as part of - indeed, may have been in the forefront in establishing — the molecular biology tradition? Why have the investigators themselves not insisted on correcting the historical record that has emerged thus far? I would like to offer two reasons: one institutional, the other scientific.
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  • 5
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    Journal of the history of biology 26 (1993), S. 89-107 
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    Notes: Conclusions Besides its use in basic research, the DNA:RNA hybridization technique has helped the development of genetic engineering: it is instrumental in the isolation of specific genes that can be inserted into foreign cells, thus modifying their genetic information. Plants, animals, and microorganisms can now be altered to yield improved crops, pest-resistant plants, and a cheaper source of important proteins or drugs. The social relevance of genetic engineering received official sanction in 1980 when the U.S. Supreme Court ruled that genetically modified organisms can be patented. In this article I have tried to describe the discovery of the DNA:RNA hybridization technique as the successful outcome of years of intelligent and patient research in many laboratories, of inductive and deductive processes in the minds of many biologists. The synthesis that led to the final result and to the early development of the technique was made possible by the coming together of two brilliant scientists, Sol Spiegelman and Benjamin Hall.
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  • 6
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    Journal of the history of biology 26 (1993), S. 351-367 
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  • 7
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    Journal of the history of biology 26 (1993), S. 385-385 
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  • 8
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    Journal of the history of biology 26 (1993), S. 409-442 
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  • 9
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    Journal of the history of biology 26 (1993), S. 329-349 
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    Notes: Conclusion In summary, the creation and maintenance of the Wistar Rats as standardized animals can be attributed to the breeding work of Helen Dean King, coupled with the management and husbandry methods of Milton Greenman and Louise Duhring, and with supporting documentation provided by Henry Donaldson. The widespread use of the Wistar Rats, however, is a function of the ingenuity of Milton Greenman who saw in them a way for a small institution to provide service to science. Greenman's rhetoric, as captured in his Director's Reports, prepared annually from 1905 until his death in 1937, shows that he was unusually sensitive to his times and to the economics of science and of society. In the era when biology was being defined, he recognized in the rat the potential to be a living analog to the pure chemicals that legitimated experimental science. From management literature he extracted the ideals of uniformity of product, standards of quality, and efficiency of production, applying them to scientific practice to generate an animal model that thrives as standard equipment in laboratories throughout the world today. I will close with a quote from Frederick W. Taylor that is a cogent statement of the contribution to science and scientific progress made by standardized tools and their creators. Equating the surgeon and the workman, Taylor wrote: [He is given] the finest implements, each one of which has been the subject of special study and development ... [and] the very best knowledge of his predecessors; and, provided with standard implements and methods which represent the best knowledge of the world up to date, he is able to use his own originality and ingenuity to make real additions to the world's knowledge, instead of reinventing things which are old. Standardized tools, whether surgeons' implements or laboratory-bred rats, are one of the vehicles for carrying scientific knowledge forward from generation to generation. In this sense, Greenman's Wistar Rats have done their job, in his words, of “providing service to science.”
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  • 10
    ISSN: 1573-0387
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    Notes: Abstract In biology proteins are uniquely important. They are not to be classed with polysaccharides, for example, which by comparison play a very minor role. Their nearest rivals are the nucleic acids....The main function of proteins is to act as enzymes. ...In the protein molecule Nature has devised a unique instrument in which an underlying simplicity is used to express great subtlety and versatility; it is impossible to see molecular biology in proper perspective until this peculiar combination of virtues has been clearly grasped.
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  • 11
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    Journal of the history of biology 26 (1993), S. 499-517 
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    Notes: Abstract I am honored to have been invited to participate in this Workshop on Comparative Studies of Building Molecular Biology, with a discussion of Japanese experiences in constructing a science — in this case, the discipline of molecular biology. As I understand it, the construction of a science must be equivalent to building a new culture. My having given this title to my paper suggests that I have enough knowledge about the subject to perhaps even extrapolate its course into the future — which I do not. What I do have is a sincere admiration of my old friends and colleagues, in Japan and elsewhere, who together tried to build a new science of molecular biology in Japan.
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  • 12
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    Journal of the history of biology 26 (1993), S. 109-129 
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    Notes: Conclusion It would be redundant to repeat the general thesis and specific claims advanced in the introduction. Yet in concluding I should like to draw attention to several broader themes that run through the article. One is that understanding Aristotle's biology demands attention to his psychology and metaphysics as well as to what some readers may regard as his strictly biological writings. Another is that Aristotle's views on homonymy and potentiality
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  • 13
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    Journal of the history of biology 26 (1993), S. 147-163 
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  • 14
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    Journal of the history of biology 26 (1993), S. 167-183 
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    Notes: Conclusion Clearly, researchers collaborate for a variety of intellectual and social reasons: to get help, to combine expertise, to gain credibility, or to create a community. No one model will hold for all cases. Similarly, no one simplistic set of rules to guide scientific conduct and guarantee scientific integrity will suffice either. Instead, those prescribing professional behavior must recognize the various types and levels of collaboration, the reasons for the collaboration, and the implications of each case.
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  • 15
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    Journal of the history of biology 26 (1993), S. 235-237 
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  • 16
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    Journal of the history of biology 26 (1993), S. 185-203 
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  • 17
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    Journal of the history of biology 26 (1993), S. 239-254 
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  • 18
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    Journal of the history of biology 26 (1993), S. 205-231 
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  • 19
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    Journal of the history of biology 26 (1993), S. 255-267 
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  • 20
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    Journal of the history of biology 26 (1993), S. 519-543 
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    Notes: Abstract Virtually no one outside Germany, however, thought that Schramm's story was right. This was because of the war. It was inconceivable to most people that the German beasts would have permitted the extensive experiments underlying his claims to be routinely carried out during the last years of a war they were so badly losing. It was all too easy to image that the work had direct Nazi support and that his experiments were incorrectly analyzed. Wasting time to disprove Schramm was not to most biochemists' liking.
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  • 21
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    Journal of the history of biology 26 (1993), S. 131-145 
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    Journal of the history of biology 26 (1993), S. 39-64 
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  • 23
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    Journal of the history of biology 26 (1993), S. 269-279 
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  • 24
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    Journal of the history of biology 26 (1993), S. 281-310 
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  • 25
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    Journal of the history of biology 26 (1993), S. 311-328 
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  • 26
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    Journal of the history of biology 26 (1993), S. 369-381 
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    Journal of the history of biology 26 (1993), S. 443-471 
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    Notes: Abstract The living world is one of complexity, the result of innumerable interactions among organisms, cells, molecules. In analyzing a problem, the biologist is constrained to focus on a fragment of reality, on a piece of the universe which he arbitrarily isolates to define certain of its parameters.In biology, any study thus begins with the choice of a “system.” On this choice depend the experimenter's freedom to maneuver, the nature of the questions he is free to ask, and even, often, the type of answer he can obtain.
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    Journal of the history of biology 26 (1993), S. 473-498 
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    Notes: Conclusion The first part of this paper has shown that the development of regulatory genetics and the lactose operon model stemmed from laboratory cultures rooted in local traditions. A "physiological" culture may be recognized in the Pasteurian context. The institutional continuity provided the basis for a tenuous link between Pasteur, Lwoff, and Monod. My claim is that the "national" value of regulatory and physiological genetics is an artifact produced in the course of the legitimization process accompanying the institutionalisation of the discipline. In the 1960s, the lactose operon model was turned into a "flag-object," a symbol of the new culture. The work done by the Pasteurian group became therefore the most important, if not the only, exemplar of molecular biology in France. The second part o f the paper described the origins of general patterns that dominated the building of molecular biology in France. The study of the relationships between molecular biologists and biochemists or immunologists revealed the existence of alternatives to the development of operon research, or to the convergence with molecular biology. Both examples uncover specific paths leading to achievements that might be viewed as international trends: the expansion of RNA and translation studies, and the development of cellular immunology. They illustrate two possible patterns of linking local settings and disciplinary traditions: an oligopolistic situation where a few groups or one institution dominate an entire field, and the emergence of "collective" trends through collaboration networks or schools.
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  • 29
    Publication Date: 1993-01-01
    Description: Verschieden alte, datierte Böden auf den Niederterrassen des Rheins werden mikromorphologisch charakterisiert und ausgewählte Merkmale dem Bodenalter gegenübergestellt. Klare Beziehungen zum Alter zeigen. Entkalkung und Tonwanderung. Bereits in der Gruppe der 1800jährigen Böden wird eine Entwicklung sichtbar. Ab 6000 Jahren kommen Parabraunerden vor. Stark entwickelt sind die Böden auf präholozänen Sedimenten. Die Bodenbildung in situ wird vom Wechselspiel aus Bodenentwicklung und -abtrag im Liefergebiet der Sedimente mitbestimmt. Die im Liefergebiet begonnene Silicatverwitterung läuft in der Aue weiter, während die Horizontdifferenzierung durch Tonverlagerung nach dem Transport in der Aue neu beginnt. Die Böden aus präholozänen Sedimenten können kurzstreckig verlagertes Material von Bt-Horizonten eemzeitlicher Böden enthalten. Die systematische Stellung der Böden wird diskutiert. Die Bedeutung der Tonwanderung zwischen Sandkörnern wird anhand verdichteter Böden des Versuchsgutes Wahn dargestellt.
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  • 30
    Publication Date: 1993-01-01
    Description: In der Subrosionssenke von Ahlshausen wurde eine 25 m mächtige Lößlehm-Fließerde-Folge mit bis zu 9 Parabraunerden (fBt- und Bleichhorizonte) untersucht. Unter dem 3. fBt fanden sich Reste eines Glaziärvorkommens, das eine elsterzeitliche Inlandvereisung belegt. Ein mächtiger Beckenschluff bis -ton im Liegenden der Lößfolge gehört vermutlich bereits in die Matuyama-Periode. In den Bahnprofilen und in Bohrungen der begleitenden Geologischen Kartierung wurden Kiesvorkommen mehrerer prä-holsteinzeitlicher Rhumeläufe nachgewiesen. Ihre Verstellung um viele Zehnermeter wird auf Hebung des Ahlshausener Gewölbes (über einem Zechstein-Salzkissen) zurückgeführt, unterbrochen durch lokale subrosive Absenkung.
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  • 31
    Publication Date: 1993-01-01
    Description: Die modernen Anforderungen an den Trinkwasserschutz, die zunehmende Zersiedelung und die landwirtschaftliche Nutzung weiter Teile der Niederrheinischen Bucht führen immer häufiger zu Nutzungskonflikten. Da die einmal vorhandenen Nutzungsstrukturen wie Naßabgrabungen und Gewerbegebiete die Flächen für eine schutzfähige Grundwassergewinnung reduzieren, bleibt oft nur die Verlagerung der Trinkwassergewinnung in zuvor nicht beanspruchte Gebiete. Am Beispiel einer Prognose für die Verschiebung einer Entnahmegalerie aus einer Zone mit gewerblicher und lagerstättentechnischer Nutzung im Umfeld des Xantener Stauchmoränenbogens kann gezeigt werden, daß auf der Grundlage quartärgeologischer Grundlagendaten und eines numerischen Grundwasserströmungsmodells eine Optimierung der Ortslage für eine Trinkwassergewinnung durchgeführt werden kann. Die eiszeitliche Überprägung weiter Teile des hydrogeologischen Grundwasserleitersystems im Xantener Bogen bedingte zahlreiche Restriktionen für die Optimierung eines Grundwassergewinnungsbereichs. Mit Hilfe der Geländeaufnahmen und der Modellrechnungen wurden verschiedene neue Brunnenstandorte simuliert und hinsichtlich der ökologischen und hydrogeologischen Restriktionen bewertet. Die Modellrechnungen ermöglichten bereits im Planungsstadium eine Vorausschau auf die Auswirkungen und den Nutzen einer Verlagerung der ursprünglichen Entnahmeschwerpunkte. Die Ergebnisse zeigen aber auch, daß ein Ausweichen der Trinkwassergewinnung zugunsten anderer Flächennutzungen mit neuen Restriktionen am neuen Standort verbunden sein kann und somit in jedem Einzelfall zu überprüfen ist.
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  • 32
    Publication Date: 1993-01-01
    Description: Im westlichen Geiseltal (mittleres Elbe-Saalegebiet, westlich von Merseburg) waren spätglaziale und holozäne Serien großflächig aufgeschlossen. Sie lagen auf der Niederterrasse und dem Löß der Weichselkaltzeit. Im wesentlichen handelte es sich um limnische und telmatische Sedimente. Sie zeigten eine Gliederung in fünf Sedimentzyklen mit zwei präböllingzeitlichen Intervallen (Müchelner Intervalle 1 und 2), mit Bölling, Alleröd und Holozän. Die Kaltphasen waren durch Beckenschluffe, die warmen Phasen durch Mudden und Torfe, seit dem Alleröd auch durch Charatravertinsande gekennzeichnet. Im Alleröd war die Laacher-See-Tephra eingelagert. In der Jüngeren Dryas-Zeit entstanden zum letzten Male Frostspaltennetze. Für Ältere Dryas-Zeit, Alleröd und Jüngere Dryas-Zeit wurde mit Hilfe der Pollenanalyse die Vegetationsgeschichte ermittelt. Alle Horizonte sind durch Molluskenfaunen dokumentiert, die in ihrer wechselnden Zusammensetzung den detaillierten Klimaablauf erkennen lassen. Zugleich liegt eine der bedeutendsten spätglazialen Molluskensukzessionen Mitteleuropas vor.
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  • 33
    Publication Date: 1993-01-01
    Description: Mineralische Rohstoffe werden in großen Mengen für die verschiedensten Wirtschaftszweige benötigt. Die Gewinnung oberflächennaher Rohstoffe bedingt i. a. eine Abbaugrube, welche später wieder in die Umgebung eingefügt, d. h. rekultiviert oder renaturiert, werden muß. Im Zuge eines erstarkenden Umwelt- und Ökologiebewußtseins ist der Renaturierung verstärkte Aufmerksamkeit zu schenken.
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  • 34
    Publication Date: 1993-01-01
    Description: Im Zuge der geologisch-telmatologischen Untersuchung des geplanten Prüfgeländes der Mercedes-Benz AG in Papenburg sind zahlreiche Bohrungen in sehr dichtem Abstand in den Mooren südöstlich von Papenburg durchgeführt worden. Die dortigen Hochmoore (Wildes Moor, Kortemoor und Klostermoor) erwiesen sich als z. T. wurzelecht, z. T. vom Versumpfungsmoortyp mit Schwarztorf-Auflage auf Mudden, lokal auch auf Niedermoor- und Bruchwaldtorf. Eine enge Bindung der Vermoorung an Ortsteinhorizonte einer frühpostglazialen Podsolierung, welche sowohl über den Talsanden als auch den Älteren Flugsanden ausgebildet ist, ist festzustellen. Die Hochmoortorfbildung setzt üblicherweise erst in der zweiten Hälfte der Pollenzone VII, gleichzeitig mit der Neolithischen Revolution ein. Starke Beteilung von Eriophorum ist für die Schwarztorfe typisch. Die der Leda und Ems tributären Nebenflüsse zeigen eine spätglazial-frühpostglaziale, auf den spätweichselzeitlichen tiefen Meeresspiegel bezogene Einschneidungsphase in die weichselzeitliche Talsandebene. Mit dem postglazialen Meeresspiegelanstieg schritt die Akkumulation - auf die ansteigende Vorflut eingespielt - von den Flußunterläufen aufwärts fort. Junge Dünenzüge begleiten die für die Siedlungsgeschichte wichtigen Talsandterrassenränder, hinter denen das Sphagnentorfwachstum bis in die Weißtorffazies fortschritt.
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  • 35
    Publication Date: 1993-01-01
    Description: Der Zedlitzer Sander (Siedlec Sandur) in Schlesien, im südwestlichen Polen gelegen, wurde zuerst von M. Schwarzbach im Jahr 1942 beschrieben. Er wurde als ein warthezeitlicher Sander gedeutet, der am Südrand der Stauchmoräne (Trzebnica Hügel, Trzebnica Katzengebirge) entstanden war. Einige neuere Untersuchungen widersprechen dieser Interpretation und negieren das Auftreten warthezeitlichen Eises in Südwest-Polen. Der vorliegende Beitrag präsentiert neue sedimentologische Untersuchungen aus den Ablagerungen des Siedlec Sanders. Das wichtigste Ergebnis dieser Studien ist eine detaillierte Beschreibung einiger klassischer, schon von Schwarzbach beschriebener und einiger neuer Aufschlüsse. Aus diesen Aufschlüssen wurde geschlossen, daß der Siedlec Sander einen eiszeitlichen Schwemmfächer mit Sedimentstrukturen repräsentiere, wie sie auch in Schwemmfächern semiarider Klimate vorkommen. Das glaziofluviatile Material des Schwemmfächers legt nahe, daß seine Sedimentation in einer kalten Polarwüste erfolgte. Dieser Schluß spricht für Schwarzbachs Deutung und nicht für die seiner Opponenten, und er belegt indirekt das Auftreten warthezeitlichen Eises in Schlesien. Im vorliegenden Beitrag wird außerdem die mögliche Ausdehnung des Eises in das Trebnitzer Katzengebirge diskutiert.
    Print ISSN: 0424-7116
    Electronic ISSN: 2199-9090
    Topics: Geosciences , History
    Published by Copernicus on behalf of Deutsche Quartärvereinigung.
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  • 36
    Publication Date: 1993-01-01
    Description: Korngrößen-, Kies- und Schwermineralanalysen würmzeitlicher Grundmoränen-Ablagerungen des Rheingletschers im baden-württembergischen Alpenvorland zeigen einen meist relativ niedrigen Einfluß des aus Molasse bestehenden Substrats auf die Zusammensetzung dieser Sedimente. Auf Grund theoretischer Überlegungen und großmorphologischer Beobachtungen wird geschlossen, daß auch die Aufnahme präexistierender quartärer Ablagerungen untergeordnet war und daß die Petrographie der Moränen-Ablagerungen hauptsächlich bestimmt wird vom während der letzten Vorland-Vergletscherung vom Rheingletscher ins Vorland transportierten Schutt.
    Print ISSN: 0424-7116
    Electronic ISSN: 2199-9090
    Topics: Geosciences , History
    Published by Copernicus on behalf of Deutsche Quartärvereinigung.
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  • 37
    Publication Date: 1993-01-01
    Description: Neuere Untersuchungen und Bohrungen haben die vom Autor im Jahre 1983 mitgeteilten Vorstellungen über den quartärgeologischen Aufbau dieses Gebietes (Lang 1983 a) bestätigt und erweitert. Die zum Drenthe-Hauptvorstoß gehörende Grundmoräne taucht unter die Endmoränenbögen im Gebiet um den Falken-Berg ab und ist auch darunter erbohrt worden. Auf den Endmoränenrücken fanden sich keinerlei Reste von Grundmoräne, desgleichen waren keine Hinweise auf Stauchungen zu beobachten. Aus Bohrungen ergeben sich keine Hinweise auf präexistente Aufragungen im Untergrund. Die Rücken der verschiedenen Endmoränenbögen sind als Satzendmoränen aufzufassen, die nicht mehr vom nordischen Inlandeis überfahren wurden. Der Mühlenberg-Zug, der Tannensieksberg und ein kleiner Rücken wenig südwestlich davon werden als Kames gedeutet. Auch sie werden, wie Bohrungen zeigten, von der Grundmoräne des Drenthe-Hauptvorstoßes unterlagert. Die Endmoränen entstanden durch zwei von NW und von NE bis NNE vorstoßende Gletscherloben, die hier aufeinandertrafen und danach abtauten. Die Endmoränen und die Kames sind dem ausgehenden Drenthe-Stadium der Saale-Kaltzeit zuzurechnen.
    Print ISSN: 0424-7116
    Electronic ISSN: 2199-9090
    Topics: Geosciences , History
    Published by Copernicus on behalf of Deutsche Quartärvereinigung.
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