TOML

地質時代区分 - TOML

地質時代区分は、地球の約46億年の歴史を系統的に分類した国際地質年代表（International Chronostratigraphic Chart）です。国際層序委員会（ICS）が定め、先カンブリア時代（冥王代、始生代、原生代）、顕生代（古生代、中生代、新生代）の4つの大時代に分類されます。各地質時代は、生物の進化、大陸の移動、気候変動などの地質学的証拠に基づいて区分されており、科学研究や教育の基盤となっています。

地質学地質年代国際地質年代表層序学地球史古生物学先カンブリア時代顕生代古生代中生代新生代

[[items]]
code = "EON-1"
slug = "precambrian"
name = "先カンブリア時代"
description = "地球誕生から約5億4100万年前までの時代。地球歴の約88%を占める。"
category = "大時代"
durationMa = 4059
endMa = 541
startMa = 4600

[[items]]
code = "EON-1-1"
slug = "hadean"
name = "冥王代"
description = "地球誕生から約40億年前まで。生命の証拠はない。"
category = "代"
durationMa = 600
endMa = 4000
startMa = 4600

[[items]]
code = "EON-1-2"
slug = "archean"
name = "始生代"
description = "約40億年前から25億年前。最古の生命の証拠が見られる。"
category = "代"
durationMa = 1500
endMa = 2500
startMa = 4000

[[items]]
code = "EON-1-3"
slug = "proterozoic"
name = "原生代"
description = "約25億年前から5億4100万年前。真核生物の出現と酸素増加。"
category = "代"
durationMa = 1959
endMa = 541
startMa = 2500

[[items]]
code = "EON-2"
slug = "phanerozoic"
name = "顕生代"
description = "約5億4100万年前から現在まで。多細胞生物が大繁栄した時代。"
category = "大時代"
durationMa = 541
endMa = 0
startMa = 541

[[items]]
code = "ERA-1"
slug = "paleozoic"
name = "古生代"
description = "約5億4100万年前から2億5200万年前。「古代生物の時代」。"
category = "代"
durationMa = 289
endMa = 252
startMa = 541

[[items]]
code = "PER-1-1"
slug = "cambrian"
name = "カンブリア紀"
description = "約5億4100万年前から4億8500万年前。カンブリア爆発が起こった。"
category = "紀"
durationMa = 56
endMa = 485
startMa = 541

[[items]]
code = "PER-1-2"
slug = "ordovician"
name = "オルドビス紀"
description = "約4億8500万年前から4億4400万年前。海洋無脊椎動物が大繁栄。"
category = "紀"
durationMa = 41
endMa = 444
startMa = 485

[[items]]
code = "PER-1-3"
slug = "silurian"
name = "シルル紀"
description = "約4億4400万年前から4億1900万年前。陸上への生物進出が始まる。"
category = "紀"
durationMa = 25
endMa = 419
startMa = 444

[[items]]
code = "PER-1-4"
slug = "devonian"
name = "デボン紀"
description = "約4億1900万年前から3億5900万年前。「魚類の時代」。"
category = "紀"
durationMa = 60
endMa = 359
startMa = 419

[[items]]
code = "PER-1-5"
slug = "carboniferous"
name = "石炭紀"
description = "約3億5900万年前から2億9900万年前。大規模な森林と石炭層が形成。"
category = "紀"
durationMa = 60
endMa = 299
startMa = 359

[[items]]
code = "PER-1-6"
slug = "permian"
name = "ペルム紀"
description = "約2億9900万年前から2億5200万年前。大陸が一つに集まり大絶滅が起こる。"
category = "紀"
durationMa = 47
endMa = 252
startMa = 299

[[items]]
code = "ERA-2"
slug = "mesozoic"
name = "中生代"
description = "約2億5200万年前から6600万年前。「爬虫類の時代」。"
category = "代"
durationMa = 186
endMa = 66
startMa = 252

[[items]]
code = "PER-2-1"
slug = "triassic"
name = "三畳紀"
description = "約2億5200万年前から2億100万年前。恐竜と哺乳類が登場。"
category = "紀"
durationMa = 51
endMa = 201
startMa = 252

[[items]]
code = "PER-2-2"
slug = "jurassic"
name = "ジュラ紀"
description = "約2億100万年前から1億4500万年前。恐竜の全盛期。"
category = "紀"
durationMa = 56
endMa = 145
startMa = 201

[[items]]
code = "PER-2-3"
slug = "cretaceous"
name = "白亜紀"
description = "約1億4500万年前から6600万年前。被子植物と恐竜の絶滅。"
category = "紀"
durationMa = 79
endMa = 66
startMa = 145

[[items]]
code = "ERA-3"
slug = "cenozoic"
name = "新生代"
description = "約6600万年前から現在。「哺乳類の時代」。"
category = "代"
durationMa = 66
endMa = 0
startMa = 66

[[items]]
code = "PER-3-1"
slug = "paleogene"
name = "古第三紀"
description = "約6600万年前から2300万年前。哺乳類の適応放散。"
category = "紀"
durationMa = 43
endMa = 23
startMa = 66

[[items]]
code = "PER-3-2"
slug = "neogene"
name = "新第三紀"
description = "約2300万年前から258万年前。草原の拡大と類人猿の進化。"
category = "紀"
durationMa = 20.42
endMa = 2.58
startMa = 23

[[items]]
code = "PER-3-3"
slug = "quaternary"
name = "第四紀"
description = "約258万年前から現在。氷河期と人類の進化。"
category = "紀"
durationMa = 2.58
endMa = 0
startMa = 2.58