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All of the major animal groups of the Ordovician oceans survived, including trilobites, "When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Silurian system was deposited, they seem to me to become ennobled.Judging from the past we may safely infer that not one living species will transmit its unaltered likeness to distant futurity." (Charles Darwin) From primal swamp to speaking humans: Ernst Haeckel said (1903) that the Pithecoiden (monkey) theory of human evolution requires tracing our animal ancestors before monkeys.It mentions the following periods to indicate how long ago coal was formed: Carboniferous followed by 359,200,000 - 326,400,000 years ago Dinantian series or epoch from the Lower Carboniferous system in Europe 326,400,000 to 313,400,000 years ago Namurian stage in the regional stratigraphy of northwest Europe are found - Silicious Grit, providing stone for building and millstones - Shale - then lime-stone and toadstone alternately.The veins of metallic ores appeared in the limestone.They said "the epithet carboniferous is of obvious application to this series".Henry Shaler Williams (1891) proposed Pennine System as the name for the Carboniferous.The amoeba has no hard part, but some single cell organisms produce microscopic skeletons or shells. Fossil evidence is consistent with these gene-based estimates. which, from a supposed resemblance.the blossom of a liliaceous plant have been denominated Encrinites". But things changed in the : There were no land animals and extinctions were confined to water life.
estimate between 18 and 11 billion with 13.8 being the closest estimation".4,540,000,000 (4.54 billion) years ago Formation of planet Earth - Usher's date was ).Archeozoic: end of Azoic to 2,500,000,000 years ago: The era of the earliest living beings on earth."More than 3.5 billion years ago, small single-celled organisms acquired the capacity to photosynthesize" "Plants were restricted to the aquatic world until three billion years later, the first uncontroversial evidence for life is found 2,700,000,000 years ago.The reference relates to sulphate and iron reduction as early forms of microbial respiration.