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The Silurian (/ s ɪ ˈ lj ʊər i. ən, s aɪ-/ sih-LURE-ee-ən, sy-) [8] [9] [10] is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.1 million years ago (), to the beginning of the Devonian Period, 419.62 Mya. [11]
This timeline of Silurian research is a chronological listing of events in the history of geology and paleontology focused on the study of Earth during the span of time lasting from 443.4–419.2 million years ago; the Silurian, and the legacies of this period in the rock and fossil records.
Since the chart combines secular history with biblical genealogy, it worked back from the time of Christ to peg their start at 4,004 B.C. Above the image of Adam and Eve are the words, "In the beginning God created the Heaven and the Earth" (Genesis 1:1) — beside which the author acknowledges that — "Moses assigns no date to this Creation.
c. 486.85 ± 1.5 Ma – Beginning of the Ordovician and the end of the Cambrian Period. c. 485 Ma – First jawless fish – radiation of Thelodont fish into the Silurian; c. 460 Ma – First crinoids evolve. c. 450 Ma – Late Ordovician microfossils of scales indicate the earliest evidence for the existence of jawed fish or Gnathostomata.
Reference is occasionally made to this period of Celtic history by the use of terms such as "Silurian". The poet Henry Vaughan called himself a "Silurist", by virtue of his roots in South Wales . The geological period Silurian was first described by Roderick Murchison in rocks located in the original lands of the Silures, hence the name.
Subdivision of the Silurian according to the ICS, as of 2023. [3] Vertical axis scale: Millions of years ago. References
Artist interpretation of a Devonian swamp forest scene. Artwork by Eduard Riou from The World Before the Deluge 1872. The Silurian-Devonian Terrestrial Revolution, also known as the Devonian Plant Explosion (DePE) [1] and the Devonian explosion, was a period of rapid colonization, diversification and radiation of land plants and fungi on dry lands that occurred 428 to 359 million years ago ...
In the geological timescale, the Ludlow Epoch (from 427.4 ± 0.5 million years ago to 423.0 ± 2.3 million years ago) occurred during the Silurian Period, after the end of the Homerian Age. It is named for the town of Ludlow in Shropshire, England. The Ludlow Epoch is subdivided into two stages: Gorstian and Ludfordian.