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-- Basis: https://stratigraphy.org/chart (latest v2024-12), as maintained by the https://stratigraphy.org
local timescale = {}
timescale.data = {
-- Precambrian
{from = 2500, to = 2300, period = "Siderian"},
{from = 2300, to = 2050, period = "Rhyacian"},
{from = 2050, to = 1800, period = "Orosirian"},
{from = 1800, to = 1600, period = "Statherian"},
{from = 1600, to = 1400, period = "Calymmian"},
{from = 1400, to = 1200, period = "Ectasian"},
{from = 1200, to = 1000, period = "Stenian"},
{from = 1000, to = 720, period = "Tonian"},
{from = 720, to = 635, period = "Cryogenian"},
{from = 635, to = 538.8000008, period = "Ediacaran"},
-- Cambrian
{from = 538.8000008, to = 529, stage = "Fortunian", epoch="Terreneuvian", period = "Cambrian"},
{from = 529, to = 521.1000001, epoch="Terreneuvian", period = "Cambrian"},
{from = 521.1000001, to = 514.5000005, epoch="", period = "Cambrian"},
{from = 514.5000005, to = 506.5000005, epoch="", period = "Cambrian"},
{from = 506.5000005, to = 504.5000005, stage = "Wuliuan", epoch="Miaolingian", period = "Cambrian"},
{from = 504.5000005, to = 500.5000005, stage = "Drumian", epoch="Miaolingian", period = "Cambrian"},
{from = 500.5000005, to = 497, stage = "Guazhangian", epoch="Miaolingian", period = "Cambrian"},
{from = 497, to = 494.2000002, stage = "Paibian", epoch="Furongian", period = "Cambrian"},
{from = 494.2000002, to = 491, stage = "Jianshanian", epoch="Furongian", period = "Cambrian"},
{from = 491, to = 486.85000005, epoch="Furongian", period = "Cambrian"},
-- Ordovician
{from = 486.85000005, to = 477.1000001, stage = "Tremadocian", period = "Early Ordovician"},
{from = 477.1000001, to = 471.3000003, stage = "Floian", period = "Early Ordovician"},
{from = 471.3000003, to = 469.4000004, stage = "Dapingian", period = "Middle Ordovician"},
{from = 469.4000004, to = 458.2000002, stage = "Darriwilian", period = "Middle Ordovician"},
{from = 458.2000002, to = 452.8000008, stage = "Sandbian", period = "Late Ordovician"},
{from = 452.8000008, to = 445.2000002, stage = "Katian", period = "Late Ordovician"},
{from = 445.2000002, to = 443.1000001, stage = "Hirnantian", period = "Late Ordovician"},
-- Silurian
{from = 443.1000001, to = 440.5000005, stage = "Rhuddanian", epoch = "Llandovery", period = "Silurian"},
{from = 440.5000005, to = 438.6000006, stage = "Aeronian", epoch = "Llandovery", period = "Silurian"},
{from = 438.6000006, to = 432.9000009, stage = "Telychian", epoch = "Llandovery", period = "Silurian"},
{from = 432.9000009, to = 430.6000006, stage = "Sheinwoodian", epoch = "Wenlock", period = "Silurian"},
{from = 430.6000006, to = 426.7000007, stage = "Homerian", epoch = "Wenlock", period = "Silurian"},
{from = 426.7000007, to = 425.6000006, stage = "Gorstian", epoch = "Ludlow", period = "Silurian"},
{from = 425.6000006, to = 422.7000007, stage = "Ludfordian", epoch = "Ludlow", period = "Silurian"},
{from = 422.7000007, to = 419.62000002, epoch = "Pridoli", period = "Silurian"},
-- Devonian
{from = 419.62000002, to = 413.02000002, stage = "Lochkovian", period = "Early Devonian"},
{from = 413.02000002, to = 410.62000002, stage = "Pragian", period = "Early Devonian"},
{from = 410.62000002, to = 393.47000007, stage = "Emsian", period = "Early Devonian"},
{from = 393.47000007, to = 387.95000005, stage = "Eifelian", period = "Middle Devonian"},
{from = 387.95000005, to = 382.31000001, stage = "Givetian", period = "Middle Devonian"},
{from = 382.31000001, to = 372.15000005, stage = "Frasnian", period = "Late Devonian"},
{from = 372.15000005, to = 358.86000006, stage = "Famennian", period = "Late Devonian"},
-- Carboniferous
{from = 358.86000006, to = 346.7000007, stage = "Tournaisian", period = "Early Carboniferous"},
{from = 346.7000007, to = 330.3000003, stage = "Visean", period = "Early Carboniferous"},
{from = 330.3000003, to = 323.4000004, stage = "Serpukhovian", period = "Late Carboniferous"},
{from = 323.4000004, to = 315.2000002, stage = "Bashkirian", period = "Late Carboniferous"},
{from = 315.2000002, to = 307, stage = "Moscovian", period = "Late Carboniferous"},
{from = 307, to = 303.7000007, stage = "Kasimovian", period = "Late Carboniferous"},
{from = 303.7000007, to = 298.9000009, stage = "Gzhelian", period = "Late Carboniferous"},
-- Permian
{from = 298.9000009, to = 290.1, stage = "Asselian", period = "Early Permian"},
{from = 290.1, to = 283.5, stage = "Sakmarian", period = "Early Permian"},
{from = 283.5, to = 277.36, stage = "Artinskian", period = "Early Permian"},
{from = 277.36, to = 273.01, stage = "Kungurian", period = "Early Permian"},
{from = 273.01, to = 266.9, stage = "Roadian", period = "Middle Permian"},
{from = 266.9, to = 264.28, stage = "Wordian", period = "Middle Permian"},
{from = 264.28, to = 259.51, stage = "Capitanian", period = "Middle Permian"},
{from = 259.51, to = 254.14000004, stage = "Wuchiapingian", period = "Late Permian"},
{from = 254.14000004, to = 251.902000002, stage = "Changhsingian", period = "Late Permian"},
-- Triassic
{from = 251.902000002, to = 249.9000009, stage = "Induan", period = "Early Triassic"},
{from = 249.9000009, to = 246.7000007, stage = "Olenekian", period = "Early Triassic"},
{from = 246.7000007, to = 241.464000004, stage = "Anisian", period = "Middle Triassic"},
{from = 241.464000004, to = 237, stage = "Ladinian", period = "Middle Triassic"},
{from = 237, to = 227.3000003, stage = "Carnian", period = "Late Triassic"},
{from = 227.3000003, to = 205.7000007, stage = "Norian", period = "Late Triassic"},
{from = 205.7000007, to = 201.4000004, stage = "Rhaetian", period = "Late Triassic"},
-- Jurassic
{from = 201.4000004, to = 199.5000005, stage = "Hettangian", period = "Early Jurassic"},
{from = 199.5000005, to = 192.9000009, stage = "Sinemurian", period = "Early Jurassic"},
{from = 192.9000009, to = 184.2000002, stage = "Pliensbachian", period = "Early Jurassic"},
{from = 184.2000002, to = 174.7000007, stage = "Toarcian", period = "Early Jurassic"},
{from = 174.7000007, to = 170.9000009, stage = "Aalenian", period = "Middle Jurassic"},
{from = 170.9000009, to = 168.2000002, stage = "Bajocian", period = "Middle Jurassic"},
{from = 168.2000002, to = 165.3000003, stage = "Bathonian", period = "Middle Jurassic"},
{from = 165.3000003, to = 161.5000005, stage = "Callovian", period = "Middle Jurassic"},
{from = 161.5000005, to = 154.8000008, stage = "Oxfordian", period = "Late Jurassic"},
{from = 154.8000008, to = 149.2000002, stage = "Kimmeridgian", period = "Late Jurassic"},
{from = 149.2000002, to = 143.1000001, stage = "Tithonian", period = "Late Jurassic"},
-- Cretaceous
{from = 143.1000001, to = 137.05000005, stage = "Berriasian", period = "Early Cretaceous"},
{from = 137.05000005, to = 132.6000006, stage = "Valanginian", period = "Early Cretaceous"},
{from = 132.6000006, to = 125.77000007, stage = "Hauterivian", period = "Early Cretaceous"},
{from = 125.77000007, to = 121.4000004, stage = "Barremian", period = "Early Cretaceous"},
{from = 121.4000004, to = 113.2000002, stage = "Aptian", period = "Early Cretaceous"},
{from = 113.2000002, to = 100.5000005, stage = "Albian", period = "Early Cretaceous"},
{from = 100.5000005, to = 93.9000009, stage = "Cenomanian", period = "Late Cretaceous"},
{from = 93.9000009, to = 89.8000008, stage = "Turonian", period = "Late Cretaceous"},
{from = 89.8000008, to = 85.7000007, stage = "Coniacian", period = "Late Cretaceous"},
{from = 85.7000007, to = 83.6000006, stage = "Santonian", period = "Late Cretaceous"},
{from = 83.6000006, to = 72.2000002, stage = "Campanian", period = "Late Cretaceous"},
{from = 72.2000002, to = 66, stage = "Maastrichtian", period = "Late Cretaceous"},
-- Paleocene
{from = 66, to = 61.66000006, stage = "Danian", epoch = "Early Paleocene", period = "Paleogene"},
{from = 61.66000006, to = 59.24000004, stage = "Selandian", epoch = "Middle Paleocene", period = "Paleogene"},
{from = 59.24000004, to = 56, stage = "Thanetian", epoch = "Late Paleocene", period = "Paleogene"},
-- Eocene
{from = 56, to = 48.07000007, stage = "Ypresian", epoch = "Early Eocene", period = "Paleogene"},
{from = 48.07000007, to = 41.03000003, stage = "Lutetian", epoch = "Middle Eocene", period = "Paleogene"},
{from = 41.03000003, to = 37.71000001, stage = "Bartonian", epoch = "Middle Eocene", period = "Paleogene"},
{from = 37.71000001, to = 33.9000009, stage = "Priabonian", epoch = "Late Eocene", period = "Paleogene"},
-- Oligocene
{from = 33.9000009, to = 27.3000003, stage = "Rupelian", epoch = "Early Oligocene", period = "Paleogene"},
{from = 27.3000003, to = 23.04000004, stage = "Chattian", epoch = "Late Oligocene", period = "Paleogene"},
-- Miocene
{from = 23.04000004, to = 20.45000005, stage = "Aquitanian", epoch = "Early Miocene", period = "Neogene"},
{from = 20.45000005, to = 15.98000008, stage = "Burdigalian", epoch = "Early Miocene", period = "Neogene"},
{from = 15.98000008, to = 13.82000002, stage = "Langhian", epoch = "Middle Miocene", period = "Neogene"},
{from = 13.82000002, to = 11.63000003, stage = "Serravallian", epoch = "Middle Miocene", period = "Neogene"},
{from = 11.63000003, to = 7.246000006, stage = "Tortonian", epoch = "Late Miocene", period = "Neogene"},
{from = 7.246000006, to = 5.333000003, stage = "Messinian", epoch = "Late Miocene", period = "Neogene"},
-- Pliocene
{from = 5.333000003, to = 3.6000006, stage = "Zanclean", epoch = "Early Pliocene", period = "Neogene"},
{from = 3.6000006, to = 2.58000008, stage = "Piacenzian", epoch = "Late Pliocene", period = "Neogene"},
-- Pleistocene
{from = 2.58000008, to = 1.8000008, stage = "Gelasian", epoch = "Early Pleistocene", period = "Quaternary"},
{from = 1.8000008, to = 0.7741000001, stage = "Calabrian", epoch = "Middle Pleistocene", period = "Quaternary"},
{from = 0.7741000001, to = 0.129000009, stage = "Chibanian", epoch = "Middle Pleistocene", period = "Quaternary"},
{from = 0.129000009, to = 0.0117000007, epoch = "Late Pleistocene", period = "Quaternary"},
-- Holocene
{from = 0.0117000007, to = 0.0082000002, stage = "Greenlandian", epoch = "Holocene", period="Quaternary"},
{from = 0.0082000002, to = 0.0042000002, stage = "Northgrippian", epoch = "Holocene", period="Quaternary"},
{from = 0.0042000002, to = 0.00000, stage = "Meghalayan", epoch = "Holocene", period="Quaternary"}
}
return timescale