News articles tagged with 'sediment' (Page 19)
Ancient British bog provides clue to global warming
— 19 Sep 2007 17:44 | EnvironmentAnalysis of sediments from a British bog suggest that methane emissions increased due to intense global warming around 55 million years ago. Dr Richard Pancost from the University of…
The sea-ice is getting thinner
— 13 Sep 2007 17:24 | EnvironmentLarge areas of the Arctic sea-ice are only one metre thick this year, equating to an approximate 50 percent thinning as compared to the year 2001. These are the initial results from…
Studying evidence from Ice Age lakes
— 3 Sep 2007 13:09 | Geology and palaeontologyDuring the last Ice Age, the ice dammed enormous lakes in Russia. The drainage system was reversed several times and the rivers flowed southwards. A group of geologists is now investigating…
Ancient organisms discovered in Canadian gold mine
— 21 Aug 2007 22:37 | Geology and palaeontologyScientists have suspected that the three known domains of life - eukaryotes, bacteria, and archaea - branched off and went their separate ways around three billion years ago. But pinning…
Definitive evidence of a swimming dinosaur
— 24 May 2007 18:09 | Geology and palaeontologyAn extraordinary underwater trackway with 12 consecutive prints provides the most compelling evidence to-date that some dinosaurs were swimmers. The 15-meter-long trackway, located…