マーストリヒチアン

Newly Life 代	第 Four Period	Holocene epoch
		The Pleistocene age	The latter period The middle Empty Briand Jelassi Ann
	Newly 第 Three Period	The Pliocene	Peer sen diAnn ザンクリアン
		The Miocene	メッシニアン Toe Toni Ann サーラバリアン ランギアン Birdie gully Ann Akitani Ann
	古 第 Three Period	The Oligocene	チャッティアン ルペリアン
		Eocene epoch	プリアボニアン Bar Toni Ann ルテシアン ヤプレシアン
		The Paleocene	サネティアン Selane Deanne Tick Ann
The inside Life 代	White 亜 Period	The latter period	マーストリヒチアン

Geological age division

Phanerozoic	New generation	The Quaternary period
		Neogene
		The Paleogene
	The Mesozoic	The Cretaceous
		The Jurassic
		Triassic period
	The Paleozoic era	Permian Period
		Carboniferous period
		Devonian period
		The Silurian
		Ordovician period
		Cambrian period
Proterozoic era
The Archeozoic era
冥王代

I include the sedimentation layer of last part of Hel creek formation (en) Cretaceous and the K-Pg border. The United States（Montana, others). An image is a thing of Montana.

One of the geological age names that are the geology term that マーストリヒチアン (an English name: Maastrichtian) was determined by international layer opening Committee (ICS).

In the Cretaceous period of the last [¹]. It is the Mesozoic most last year. I followed during approximately 6 million years from (error around 200,000 years) to approximately 66 million years ago [²] approximately 72,100,000 years ago.

There is a large number of another name including "trout avian water caltrop Ann" "マーストリヒティアン" "マーストリヒチアン" "Maastricht period" in Japanese. I pronounce it in English like "マストリクシャン".

Table of contents

Name

It comes from Maastricht (Maastricht.the Dutch place name) where remains of this time including the frame fossil of the mosasaur are discovered in large quantities of Netherlands.

In addition, there is the name called "Maastricht floor", but is not the thing indicating the times. It is a relation to form a pair for assumed name "Maastricht period" at layer opening name "Maastricht floor" and time that are the unit that "the floor" is called on for stratum (layer opening name). Specifically, refer to "many generations".

General statement

For the end period of this time, I had a very big environmental change and the mass extinction of the creature with it, ecosystemic large-scale complete reform. A curtain is taken down for the Cretaceous and the Mesozoic by this change and shifts to the Paleogene in the next new generation. The thing equal to the border of (a cable address: T.a former title in the Paleogene) says "K-Pg border" in the geology for earth sciences in Tertiary period in (a cable address: K) and a new generation in the Cretaceous for the Mesozoic at this time when the importance is high. At the time of the K-Pg border, straight foundation group of the number of a large quantity of kinds including almost all dinosaurs [³] and Pterosauria except the kind to lead to actual money birds and main 海棲爬虫類 was driven to the extinction. On the other hand, enormous niches (ecological niche) were evacuated in the kind that survived and led to the later dramatic adaptive radiation.

Geological age division (chronological order)

マーストリヒチアン belongs to the part which I showed in a bold-face. It becomes the macrotaxonomy so as to go to the bottom.

• Company Ann - マーストリヒチアン - (the new generation Paleogene Paleocene) tick Ann
• The Cretaceous (periodization method 〈 world 〉) to divide into three sittings ：Neo-Komi Ann（en） - ガリック（en） - セノニアン（en）
• The Cretaceous (the periodization method to divide into anteroposterior two sittings) ：- - new generation Paleogene in the first half of the Cretaceous in the latter half of the Cretaceous
• Phanerozoic ：The Paleozoic era - The Mesozoic（Triassic period - The Jurassic - The Cretaceous） - New generation
• Many generations ：隠生代 (the Precambrian) - Phanerozoic

Footnote

[Help]

1. One unit of ^ geological age division (I refer to "many generations").
2. ^ "INTERNATIONAL CHRONOSTRATIGRAPHIC CHART (international generation layer opening list) (PDF)". The Geological Society of Japan. March 19, 2014 reading.
3. It is suggested that a few genus such as ^ Alamo Saul's or ヒプセロサウルス might survive this severe extinction from a fossil.

References

The correction of this knob is expected.

Allied item

• The geological age
• K-Pg border - Mass extinction of the end of the Cretaceous
• チクシュルーブ crater

Outside link

• "Japanese description guidelines January, 2014 revised edition of a geologic system, the generation". The Geological Society of Japan. March 19, 2014 reading.
• Takashi Nakata (October 29, 2009). "Geologic time table". Whim biology. February 14, 2011 reading.

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