Relier Pairs Evidence of past ecosystemsVersion en ligne Complete this matching activity on evidence of past ecosystems. par Belinda Schirmer 1 Gas and particles (e.g., dust, pollen, volcanic ash and radioactive particles) get trapped in snow as it falls year after year, building up layers. 2 Principals of stratigraphy, volcanic ash deposits, banded iron formations and Palaeosoils ('fossilised soils'). 3 Longest unbroken art tradition in the world (40000 years). Recorded evidence of climate and organisms including types and abundance in their art. 4 Evidence of past life from mineralised remains, organic remains, impressions, trace fossils, microfossils, Stromatolites and molecular biomarkers. 5 Determining levels of atmospheric carbon dioxide, oxygen and other gases to estimate atmospheric temperature. 6 Absolute age of fossil, rock or mineral determined using predictable decay rates of isotopes. Carbon-14 for fossils. Fisson-tracking and luminescence. Geological Rock Art Radiometric dating Gas analysis Ice cores Palaeontological
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