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The Andean-Saharan glaciation, also known as the Early Palaeozoic Icehouse, the Early Palaeozoic Ice Age, the Late Ordovician glaciation, the end-Ordovician glaciation, or the Hirnantian glaciation, occurred during the Paleozoic from approximately 460 Ma to around 420 Ma, during the Late Ordovician and the Silurian period. The major glaciation during this period, which was formerly thought only to consist of the Hirnantian glaciation itself, but has now been recognized as a longer, more gradual event that began as early as the Darriwilian, is widely considered to be the leading cause of the Ordovician-Silurian extinction event. Evidence of this glaciation can be seen in places such as Arabia, North Africa, South Africa, Brazil, Peru, Bolivia, Chile, Argentina, and Wyoming. More evidence de

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  • غمر جليدي الأنديز-الصحراء الكبرى هو دور جليدي حدث خلال حقبة الحياة القديمة من 450 إلى 420 مليون سنة مضت، خلال الأردوفيشي المتأخر والسيلوري. خلال هذه الحقبة حدث الغمر الجليدي في شبه الجزيرة العربية والصحراء الكبرى وشمال أفريقيا وجنوب الأمازون والأنديز، مركز الغمر الجليدي هاجر من الصحراء الكبرى في الأردوفيشي (450-440 مليون سنة) إلى أمريكا الجنوبية في السيلوري (440-420 مليون سنة)، أقصى امتداد للغمر الجليدي كان في أفريقيا وشرق البرازيل. وقد سبق غمر جليدي الأنديز-الصحراء الكبرى من العصور الجليدية العصر البارد (حقب الغمر الجليدي الستورتي والمارينوي، 850-630 مليون سنة مضت)، وغالبًا ما يشار إليها بالكرة الأرضية الثلجية، وتلاه العصر الجليدي كارو (350-260 مليون سنة مضت). (ar)
  • The Andean-Saharan glaciation, also known as the Early Palaeozoic Icehouse, the Early Palaeozoic Ice Age, the Late Ordovician glaciation, the end-Ordovician glaciation, or the Hirnantian glaciation, occurred during the Paleozoic from approximately 460 Ma to around 420 Ma, during the Late Ordovician and the Silurian period. The major glaciation during this period, which was formerly thought only to consist of the Hirnantian glaciation itself, but has now been recognized as a longer, more gradual event that began as early as the Darriwilian, is widely considered to be the leading cause of the Ordovician-Silurian extinction event. Evidence of this glaciation can be seen in places such as Arabia, North Africa, South Africa, Brazil, Peru, Bolivia, Chile, Argentina, and Wyoming. More evidence derived from isotopic data is that during the Late Ordovician, tropical ocean temperatures were about 5 °C cooler than present day; this would have been a major factor that aided in the glaciation process. The Late Ordovician is the only glacial episode that appears to have coincided with a major mass extinction of nearly 61% of marine life. Estimates of peak ice sheet volume range from 50 to 250 million cubic kilometers, and its duration from 35 million to less than 1 million years. There were also two peaks of glaciation. Glaciation of the Northern Hemisphere was minimal because a large amount of the land was in the Southern Hemisphere. (en)
  • La glaciación Andino-Sahariana se produjo durante el Paleozoico, entre 450 Ma y 420 Ma, durante el Ordovícico Tardío y el Silúrico. (es)
  • La glaciation de l'Andéen-Saharien a affecté l'actuel hémisphère nord entre 450 et 420 Ma, au Paléozoïque, durant l'Ordovicien supérieur et le Silurien. (fr)
  • La glaciazione andino-sahariana è un periodo glaciale che ha interessato il Paleozoico tra 450 e 420 milioni di anni fa, l'Ordoviciano superiore e il Siluriano. Secondo Eyles e Young, "un importante episodio glaciale avvenuto circa 440 milioni di anni fa, è registrato negli strati dell'Ordoviciano superiore in Africa occidentale (formazione di Tamadjert, nel Sahara), in Marocco (Bacino di Tindouf) e nell'Arabia Saudita centro-occidentale. Tutte queste aree si trovavano a latitudini polari in quell'epoca. Dall'Ordoviciano superiore al periodo Llandovery del Siluriano, il centro della glaciazione si spostò dall'Africa settentrionale alla parte sudoccidentale dell'America meridionale." Evidenze di glaciazione risalenti a quel periodo si trovano in Arabia, Sahara, Africa occidentale, Amazzonia meridionale e nelle Ande. Il centro della glaciazione che nell'Ordoviciano (450-440 milioni di anni fa) si trovava nel Sahara, migrò in Sud America nel corso del Siluriano (440-420 milioni di anni fa). La massima estensione della glaciazione si sviluppò in Africa e nel Brasile orientale. La glaciazione andino-sahariana è una glaciazione minore e fu preceduta dalle più importanti glaciazioni del Cryogeniano avvenute tra 720 e 630 milioni di anni fa, come la Sturtiana e la Marinoana che trasformarono la Terra in una palla di neve; fu seguita dalla glaciazione del Karoo (350-260 milioni di anni fa). (it)
  • Anderna-Saharaistiden var den tredje kända istiden på Jorden. Denna nedisning inträffade för mellan 460 och 530 miljoner år sedan, och ledde till ett av de fem större massutdöendena i Jordens historia. Under Ordovicium låg tyngdpunkten av nedisningen i det område som nu upptas av Sahara, men försköts under Silur till områden som nu ligger i Sydamerika. (sv)
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  • La glaciación Andino-Sahariana se produjo durante el Paleozoico, entre 450 Ma y 420 Ma, durante el Ordovícico Tardío y el Silúrico. (es)
  • La glaciation de l'Andéen-Saharien a affecté l'actuel hémisphère nord entre 450 et 420 Ma, au Paléozoïque, durant l'Ordovicien supérieur et le Silurien. (fr)
  • Anderna-Saharaistiden var den tredje kända istiden på Jorden. Denna nedisning inträffade för mellan 460 och 530 miljoner år sedan, och ledde till ett av de fem större massutdöendena i Jordens historia. Under Ordovicium låg tyngdpunkten av nedisningen i det område som nu upptas av Sahara, men försköts under Silur till områden som nu ligger i Sydamerika. (sv)
  • غمر جليدي الأنديز-الصحراء الكبرى هو دور جليدي حدث خلال حقبة الحياة القديمة من 450 إلى 420 مليون سنة مضت، خلال الأردوفيشي المتأخر والسيلوري. خلال هذه الحقبة حدث الغمر الجليدي في شبه الجزيرة العربية والصحراء الكبرى وشمال أفريقيا وجنوب الأمازون والأنديز، مركز الغمر الجليدي هاجر من الصحراء الكبرى في الأردوفيشي (450-440 مليون سنة) إلى أمريكا الجنوبية في السيلوري (440-420 مليون سنة)، أقصى امتداد للغمر الجليدي كان في أفريقيا وشرق البرازيل. (ar)
  • The Andean-Saharan glaciation, also known as the Early Palaeozoic Icehouse, the Early Palaeozoic Ice Age, the Late Ordovician glaciation, the end-Ordovician glaciation, or the Hirnantian glaciation, occurred during the Paleozoic from approximately 460 Ma to around 420 Ma, during the Late Ordovician and the Silurian period. The major glaciation during this period, which was formerly thought only to consist of the Hirnantian glaciation itself, but has now been recognized as a longer, more gradual event that began as early as the Darriwilian, is widely considered to be the leading cause of the Ordovician-Silurian extinction event. Evidence of this glaciation can be seen in places such as Arabia, North Africa, South Africa, Brazil, Peru, Bolivia, Chile, Argentina, and Wyoming. More evidence de (en)
  • La glaciazione andino-sahariana è un periodo glaciale che ha interessato il Paleozoico tra 450 e 420 milioni di anni fa, l'Ordoviciano superiore e il Siluriano. Secondo Eyles e Young, "un importante episodio glaciale avvenuto circa 440 milioni di anni fa, è registrato negli strati dell'Ordoviciano superiore in Africa occidentale (formazione di Tamadjert, nel Sahara), in Marocco (Bacino di Tindouf) e nell'Arabia Saudita centro-occidentale. Tutte queste aree si trovavano a latitudini polari in quell'epoca. Dall'Ordoviciano superiore al periodo Llandovery del Siluriano, il centro della glaciazione si spostò dall'Africa settentrionale alla parte sudoccidentale dell'America meridionale." (it)
rdfs:label
  • غمر جليدي الأنديز-الصحراء الكبرى (ar)
  • Andean-Saharan glaciation (en)
  • Glaciación Andino-Sahariana (es)
  • Glaciation de l'Andéen-Saharien (fr)
  • Glaciazione andino-sahariana (it)
  • Anderna-Saharaistiden (sv)
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