Geological timescale
Science TheosophyBegan (years BP) Began (years BP)Phanerozoic eon Cenozoic era Quaternary period: Holocene epoch 11,700Pleistocene 2,588,000 1,090,000Tertiary period: Pliocene 5,333,000 1,870,000Miocene 23,030,000 3,670,000Oligocene 33,900,000 5,280,000Eocene 56,000,000 7,130,000Palaeocene 66,000,000 7,870,000Mesozoic era Cretaceous 145,000,000 16,000,000Jurassic 201,300,000 28,000,000Triassic 252,170,000 44,000,000Palaeozoic era Permian 298,900,000 74,000,000Carboniferous 358,900,000 110,000,000Devonian 419,200,000 148,000,000Silurian 443,400,000 179,000,000Ordovician 485,400,000 214,000,000Cambrian 541,000,000 250,000,000Proterozoic eon 2,500,000,000 1,120,000,000Archean eon 4,000,000,000 1,890,000,000Hadean eon 4,600,000,000 2,170,000,000
According to theosophy, the fourth round of the earth’s evolution began about 320 million years ago, at the end of the Proterozoic. The corresponding scientific date is about 640 million years ago.Sources:
2013 International Stratigraphic Chart, stratigraphy.org/ICSchart/ChronostratChart2013-01.pdf
H.P. Blavatsky, The Secret Doctrine, TUP, 1977 (1888), 2:68-70, 709-15
Frederick J. Dick and William Scott, ‘The age of the earth’, The Theosophical Path, April 1919, pp. 369-79
David Pratt, Geochronology: theosophy and science and Secret cycles, davidpratt.infoProblems with radiometric dating:
G. de Purucker, The Esoteric Tradition, 2nd ed., TUP, 1940, pp. 324-7 (ch. 10), 453-4 (ch. 14), 760 (ch. 25)
David Pratt, The age of earth, davidpratt.info
Last revised: March 2013.