Editing Template:Next period

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|hadean=archean 
|isuan=swazian
|archean=proterozoic 
|proterozoic|precambrian=phanerozoic

|eoarchean=palaeoarchean
|palaeoarchean|paleoarchean=mesoarchean
|mesoarchean=neoarchean
|neoarchean=paleoproterozoic 
|paleoproterozoic=mesoproterozoic 
|mesoproterozoic=neoproterozoic 
|neoproterozoic=paleozoic 
|sinian=paleozoic
|sturtian=vendian
|paleozoic=mesozoic 
|mesozoic=cenozoic 

|siderian=rhyacian
|rhyacian=orosirian
|orosirian=statherian
|statherian=calymmian
|calymmian=ectasian
|ectasian=stenian
|stenian=tonian
|tonian=cryogenian
|baikalian=vendian
|riphean=aimchanian
|aimchanian=mayanian
|cryogenian=ediacaran
|ediacaran=cambrian 
|vendian=cambrian
|merioneth=ordovician
|cambrian=ordovician 
|ordovician=silurian 
|silurian=devonian 
|devonian=mississippian
|carboniferous=permian 
|permian=triassic 
|triassic=jurassic 
|jurassic=cretaceous 
|cretaceous=paleogene 
|paleogene=neogene 

|early ediacaran|lower ediacaran=mid ediacaran
|mid ediacaran|middle ediacaran=late ediacaran
|terminal ediacaran|late ediacaran=early cambrian

|terreneuvian|tommotian=series 2
|atdabanian=botomian
|series 2|cambrian series 2=series 3
|series 3|cambrian series 3=upper cambrian
|middle cambrian|mid cambrian|st davids=late cambrian
|manykaian|nemakit-daldynian=caerfai
|early cambrian|lower cambrian|caerfai=middle cambrian
|mayan=nganasanian
|nganasanian|mindyallan=merioneth
|late cambrian|upper cambrian|franconian|furongian|mansian=lower ordovician<!--Franconian doesn't really belong here but this'll do for a crude approximation-->

|early ordovician|lower ordovician|late early ordovician=middle ordovician
|middle ordovician|mid ordovician = late ordovician
|late ordovician|upper ordovician=llandovery|llandovery=wenlock
|wenlock=ludlow
|ludlow=pridoli
|pridoli|unnamed pridoli stage=lochkovian
|early silurian|lower silurian=late silurian 
|late silurian|upper silurian=early devonian
|early devonian|lower devonian=middle devonian
|middle devonian|mid devonian=late devonian
|late devonian|upper devonian=mississippian
|early carboniferous|lower carboniferous|mississippian=pennsylvanian
|early mississippian|lower mississippian=middle mississippian
|middle mississippian|mid mississippian=late mississippian
|late mississippian|upper mississippian=early pennsylvanian
|early pennsylvanian|lower pennsylvanian=middle pennsylvanian
|middle pennsylvanian|mid pennsylvanian=late pennsylvanian
|late pennsylvanian|upper pennsylvanian=early permian
|late carboniferous|upper carboniferous|pennsylvanian=permian
|early permian|lower permian|cisuralian=middle permian
|middle permian|mid permian|guadalupian=late permian
|late permian|upper permian|lopingian=early triassic
|early triassic|lower triassic=middle triassic
|middle triassic|mid triassic=late triassic
|late triassic|upper triassic=early jurassic
|early jurassic|lower jurassic=middle jurassic
|middle jurassic|mid jurassic=late jurassic
|late jurassic|upper jurassic=early cretaceous
|early cretaceous|lower cretaceous=late cretaceous
|late cretaceous|upper cretaceous|senonian=paleocene
|paleocene=eocene
|eocene=oligocene 
|oligocene=miocene 
|miocene=pliocene 
|pliocene=pleistocene
|pleistocene|rancholabrean=holocene

<!-- these are duplicated below, and the last one is wrong -->
<!--
|early paleocene|lower paleocene=middle paleocene
|middle paleocene|mid paleocene=late paleocene
|late paleocene|upper paleocene=early eocene
|early eocene|lower eocene=middle eocene
|middle eocene|mid eocene=late eocene
|late eocene|upper eocene=early oligocene
|early oligocene|lower oligocene=late oligocene
|late oligocene|upper oligocene=early miocene
|early miocene|lower miocene=middle miocene
|middle miocene|mid miocene=late miocene
|late miocene|upper miocene=early pliocene
|early pliocene|lower pliocene=late pliocene
|late pliocene|upper pliocene=holocene
-->

|fortunian|earliest cambrian=stage 2
|cambrian stage 2|stage 2=stage 3
|cambrian stage 3|stage 3=stage 4
|cambrian stage 4|stage 4|late early cambrian=wuliuan
|wuliuan|cambrian stage 5|stage 5|early middle cambrian=drumian
|drumian=guzhangian
|guzhangian=paibian
|late middle cambrian|paibian=jiangshanian
|jiangshanian=stage 10
|cambrian stage 10|stage 10=tremadocian
|tremadocian=floian
|arenig|floian=dapingian
|ordovician iii|dapingian|early middle ordovician=darriwilian
|darriwilian=sandbian
|ordovician v|sandbian=katian
|early late ordovician=middle late ordovician
|ordovician vi|katian|middle late ordovician=hirnantian
|hirnantian=llandovery 
|lochkovian=pragian
|pragian|praghian=emsian
|emsian=eifelian
|eifelian=givetian
|givetian=frasnian
|frasnian=famennian
|famennian=early mississippian
|namurian=westphalian
|westphalian=stephanian
|stephanian=permian
|asselian=sakmarian
|sakmarian=artinskian
|artinskian=kungurian
|kungurian=roadian
|roadian|ufimian=wordian
|wordian=capitanian
|capitanian=wuchiapingian
|wuchiapingian|longtanian=changhsingian
|changhsingian=induan
|induan=olenekian
|olenekian|spathian=anisian
|hydaspian=pelsonian
|pelsonian=illirian
|anisian|illirian=ladinian
|lower ladinian=middle ladinian
|middle ladinian=upper ladinian
|ladinian|upper ladinian=carnian
|carnian=norian
|norian=rhaetian
|rhaetian=hettangian
|hettangian=sinemurian
|sinemurian=pliensbachian
|pliensbachian=toarcian
|toarcian=aalenian
|aalenian=bajocian
|bajocian=bathonian
|bathonian=callovian
|callovian=oxfordian
|oxfordian=kimmeridgian
|kimmeridgian=tithonian
|tithonian=berriasian
|berriasian=valanginian
|valanginian=hauterivian
|hauterivian|neocomian=barremian
|barremian=aptian
|aptian=albian
|albian=cenomanian
|cenomanian=turonian
|turonian|gallic=coniacian
|coniacian=santonian
|santonian=campanian
|campanian=maastrichtian
|maastrichtian=early paleocene 
|early paleocene|lower paleocene=middle paleocene 
|middle paleocene|mid paleocene=late paleocene 
|late paleocene|upper paleocene=early eocene 
|early eocene|lower eocene=middle eocene 
|middle eocene|mid eocene=late eocene 
|late eocene|upper eocene=early oligocene 
|early oligocene|lower oligocene=late oligocene 
|late oligocene|upper oligocene=early miocene 
|early miocene|lower miocene=middle miocene 
|middle miocene|mid miocene=late miocene 
|late miocene|upper miocene=early pliocene 
|early pliocene|lower pliocene=late pliocene 
|late pliocene|upper pliocene=early pleistocene
|early pleistocene|lower pleistocene=middle pleistocene
|middle pleistocene|mid pleistocene=late pleistocene
|late pleistocene=early holocene
|early holocene|lower holocene=middle holocene
|middle holocene=late holocene

|rhuddanian=aeronian
|aeronian=telychian
|telychian=sheinwoodian
|sheinwoodian=homerian
|homerian=gorstian
|gorstian=ludfordian
|ludfordian=pridoli

|tournaisian=visean
|visean=serpukhovian
|serpukhovian=bashkirian
|bashkirian=moscovian
|moscovian=kasimovian
|kasimovian=gzhelian
|gzhelian=asselian

|puercan=torrejonian
|torrejonian=tiffanian
|tiffanian=clarkforkian
|clarkforkian=wasatchian
|wasatchian=bridgerian
|bridgerian=uintan
|uintan=duchesnean
|duchesnean=chadronian
|chadronian=orellan
|orellan=whitneyan
|whitneyan=arikareean
|arikareean=hemingfordian
|hemingfordian=barstovian
|barstovian=clarendonian
|clarendonian=hemphillian
|hemphillian=blancan
|blancan=irvingtonian
|irvingtonian=rancholabrean


|danian=selandian
|selandian=thanetian
|thanetian=ypresian
|ypresian=lutetian
|mp 10=mp 11
|lutetian|mp 11=bartonian
|bartonian=priabonian
|priabonian=rupelian
|rupelian=chattian
|chattian=aquitanian
|aquitanian=burdigalian
|burdigalian=langhian
|langhian=serravallian
|serravallian=tortonian
|tortonian=messinian
|messinian=zanclean
|zanclean=piacenzian
|piacenzian=gelasian
|gelasian=calabrian
|calabrian=chibanian
|chibanian|ionian=late pleistocene
|tarantian=greenlandian
|greenlandian=northgrippian
|northgrippian=meghalayan

|tertiary=quaternary
|neogene=quaternary
|late holocene|upper holocene|meghalayan|holocene|quaternary|cenozoic|phanerozoic|now|recent|present=now
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