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{{Template test cases notice}}

Current text. This is the list of start dates from template.
<pre>
<!-- We can also include notable dates which are subject to change, e.g. Burgess shale-->
|isuan=4000
|riphean=1400
|mayanian=1100
|sinian|sturtian=1050
|baikalian=850
|vendian=650
|doushantou=570
|manykaian|nemakit-daldynian=542
|caerfai|tommotian=530
|atdabanian=526
|sirius passet=525
|chengjiang=524
|botomian=522
|toyonian=516
|st davids=513
|burgess shale<!--Mid middle is approximate; cf. Burgess Shale-->=505
|nganasanian|mindyallan=503
|merioneth=501
|franconia=499
|mansian=490
|downtonian=416
|praghian=410.9
|namurian=326
|stephanian=304
|ufimian=270.6
|longtanian=260.4
|spathian=249.7
|neocomian=145.5
|gallic=130
|senonian=89.3
|puercan=65
|torrejonian=63.3
|tiffanian=60.2
|clarkforkian=56.8
|mp 10=55.8
|wasatchian=55.4
|bridgerian=50.3
|mp 11=48.6
|uintan=46.2
|duchesnean=42
|chadronian=38
|orellan=33.9
|whitneyan=33.3
|arikeean=30.6
|hemingfordian=20.6
|barstovian=16.3
|clarendonian=13.6
|hemphillian=10.3
|blancan=4.75
|irvingtonian=1.8
|rancholabrean=0.24

|hadean|precambrian=4567
|archean|archaean|eoarchean|eoarchaean=4000
|paleoarchean|palaeoarchaean=3600
|mesoarchean|mesoarchaean=3200
|neoarchean|neoarchaean=2800
|proterozoic|paleoproterozoic|palaeoproterozoic|siderian=2500
|rhyacian=2300
|orosirian=2050
|statherian=1800
|mesoproterozoic|calymmian=1600
|ectasian=1400
|stenian=1200
|neoproterozoic|tonian=1000
|cryogenian=850
|ediacaran=635
|phanerozoic|paleozoic|palaeozoic|cambrian|early cambrian|lower cambrian|terreneuvian|fortunean=541
|cambrian stage 2=529
|series 2|cambrian series 2|stage 3|cambrian stage 3=521
|cambrian stage 4|stage 4=514
|middle cambrian|mid cambrian|series 3|cambrian series 3|cambrian stage 5|stage 5=509
|drumian=504.5
|guzhangian=500.5
|furongian=|late cambrian|upper cambrian|paibian=497
|jiangshanian|cambrian stage 9|stage 9=493
|cambrian stage 10|stage 10=489.5
|ordovician|early ordovician|lower ordovician|tremadocian=485.4
|arenig|floian=477.7
|middle ordovician|mid ordovician|dapingian=470
|darriwilian=467.3
|late ordovician|upper ordovician|sandbian=458.4
|katian=453
|hirnantian=445.2
|silurian|early silurian|lower silurian|llandovery|rhuddanian=443.4
|aeronian=440.8
|telychian=438.5
|wenlock|sheinwoodian=433.4
|homerian=430.5
|late silurian|upper silurian|ludlow|gorstian=427.4
|ludfordian=425.6
|pridoli|unnamed pridoli stage=423
|devonian|early devonian|lower devonian|lochkovian=419.2
|pragian=410.8
|emsian=407.6
|middle devonian|mid devonian|eifelian=393.3
|givetian=387.7
|late devonian|upper devonian|frasnian=382.7
|famennian=372.2
|carboniferous|mississippian|early mississippian|lower mississippian|tournaisian=358.9
|middle mississippian|visean=346.7
|late mississippian|serpukhovian=330.9
|pennsylvanian|early pennsylvanian|lower pennsylvanian|bashkirian=323.2
|middle pennsylvanian|moscovian=315.3
|late pennsylvanian|kasimovian=307.0
|gzhelian=303.6
|permian|early permian|lower permian|cisuralian|asselian=298.9
|sakmarian=295.5
|artinskian=290.1
|kungurian=279.3
|middle permian|mid permian|guadalupian|roadian=272.3
|wordian=268.8
|capitanian=265.1
|late permian|upper permian|lopingian|wuchiapingian=259.9
|changhsingian=254.2
|mesozoic|triassic|early triassic|lower triassic|induan=252.2
|olenekian=251.2
|middle triassic|mid triassic|anisian=247.2
|ladinian=242
|late triassic|upper triassic|carnian=235
|norian=228
|rhaetian=208.5
|jurassic|early jurassic|lower jurassic|hettangian=201.3
|sinemurian=199.3
|pliensbachian=190.8
|toarcian=182.7
|middle jurassic|mid jurassic|aalenian=174.1
|bajocian=170.3
|bathonian=168.3
|callovian=166.1
|late jurassic|upper jurassic|oxfordian=163.5
|kimmeridgian=157.3
|tithonian=152.1
|cretaceous|early cretaceous|lower cretaceous|berriasian=145
|valanginian=139.8
|hauterivian=132.9
|barremian=129.4
|aptian=125
|albian=113
|late cretaceous|upper cretaceous|cenomanian=100.65
|turonian=93.9
|coniacian=89.8
|santonian=86.3
|campanian=83.6
|maastrichtian=72.1
|cenozoic|cainozoic|tertiary|paleogene|palaeogene|paleocene|palaeocene|danian=66
|selandian=61.6
|thanetian=59.2
|eocene|ypresian=56
|lutetian=47.8
|bartonian=41.3
|priabonian=38.0
|oligocene|rupelian=33.9
|chattian=28.1
|neogene|miocene|aquitanian=23.03
|burdigalian=20.44
|langhian=15.97
|serravallian=13.82
|tortonian=11.62
|messinian=7.246
|pliocene|zanclean=5.333
|piacenzian=3.600
|quaternary|pleistocene|early pleistocene|lower pleistocene|gelasian=2.588
|calabrian=1.806
|middle pleistocene|mid pleistocene|ionian=0.781
|late pleistocene|upper pleistocene|tarantian=0.126
|holocene=0.0117

|now|recent|present|current=0}}</pre>
<noinclude>[[Category:Geological period templates]]</noinclude>
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