of speciation, rather than particularly high rates of extinction. See also Fossil Grove References Further reading ; 1890: Carboniferous deposits of the Moscow region and artesian waters near Moscow, Trudy Geologicheskogo Komiteta 5(5), pp. 1–182 . External links Carboniferous timescale at the website of the Norwegian network of offshore records of geology and stratigraphy Serpukhovian, Geowhen Database The Serpukhovian age, www.palaeos.com Mississippian geochronology Geological ages