File:Mollweide_Paleographic_Map_of_Earth,_105_Ma_(Albian_Age).png · Wikimedia Commons · See Wikimedia Commons

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白亜紀

Also known as Cretaceous Period, Cretaceous System

地球の地質時代のひとつ

AI overview

The Cretaceous is a geological period that lasted approximately 77 million years, ending about 66 million years ago, and represents the final and longest period of the Mesozoic Era. It gets its name from the abundant chalk deposits found in rocks from the latter part of this time span, and it is the longest geological period in the entire Phanerozoic Eon.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Geologic timespan.name: Cretaceous
Geologic timespan.color: Cretaceous
Geologic timespan.top_bar: Phanerozoic
Geologic timespan.time_start: 143.1
Geologic timespan.time_start_uncertainty: 0.6
Geologic timespan.time_end: 66.0
Geologic timespan.image_map: Mollweide Paleographic Map of Earth, 105 Ma (Albian Age).png
Geologic timespan.caption_map: A map of Earth as it appeared 105 million years ago during the Early Cretaceous Epoch (Albian Age)
Geologic timespan.timeline: Cretaceous
Geologic timespan.name_formality: Formal
Geologic timespan.celestial_body: Earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Period
Geologic timespan.strat_unit: System
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: Not formally defined
Geologic timespan.lower_def_candidates: Magnetic—base of Chron M18r Base of Calpionellid zone B FAD of Ammonite Berriasella jacobi

via Wikipedia infobox

Wikidata facts

Instance of: system
Has part: Late Cretaceous
Named after: chalk
Followed by: Paleogene
Follows: Jurassic
Image: Caspar David Friedrich's Chalk Cliffs on Rügen.jpg
Significant event: Cretaceous-Paleogene mass extinction

Show 9 more facts

Commons category: Cretaceous
topic's main category: Category:Cretaceous
start time: 145000000-
end time: 66000000-0
sRGB color hex triplet: 7FC64E
different from: Crete
named by: Jean Baptiste Julien d'Omalius d'Halloy
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
IPA transcription: /krɪˈteɪʃəs/

Sources (6)

via Wikidata · CC0

Article · 日本語

白亜紀（はくあき、白堊紀、Cretaceous period）とは、地球の地質時代の一つで、約1億4,500万年前から6,600万年前を指す。この時代は、前のジュラ紀から続く中生代の最後の時代である。次の時代は、新生代古第三紀の暁新世である。「白堊」の「堊（アク; アと読むのは慣習）」の字は粘土質な土、すなわち石灰岩を意味し、石灰岩の地層から設定された地質年代のため白堊紀の名がついた。また「白亜」の「亜」は、「堊」の同音の漢字による書きかえである。

Abstract from DBpedia / Wikipedia · CC BY-SA