Geanticline - Chihaisha (English spelling)

Japanese: 地背斜 - ちはいしゃ(英語表記)geanticline
Geanticline - Chihaisha (English spelling)

Based on the theory of geosynclinal orogeny, it is a wide, fluctuating uplift zone that corresponds to the geosyncline of a long and narrow depositional province. It has the same regional extent as a geosyncline and is located adjacent to it or between two geosynclines. It is believed that the huge amount of clastic material brought to the geosyncline was transported from the geoanticline, which became an erosion area. According to a report by J. Aubouin of France in 1965, when a eugeogeosyncline and a miogeosyncline are aligned, the one located between them is called a miogeoanticlinal uplift, and the one located on the opposite side of the eugeogeosyncline is called a eugeogeoanticlinal uplift.

The term geoanticline is no longer in use, as the term geosyncline fell out of use with the advent of the plate tectonics theory.

[Akihiro Murata]

[References] | Geosyncline

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

地向斜・造山運動論に基づいて考えられたもので、細長い堆積(たいせき)区の地向斜に対応する地帯として、変動する幅広い隆起帯のことをいう。地向斜と同程度の地域的広がりをもち、地向斜に隣り合うか、または地向斜と地向斜の間に位置する。地向斜にもたらされる膨大な量の砕屑(さいせつ)物は、地背斜が侵食区となってここから運ばれたものとされる。フランスのオーボワンJ. Aubouinが1965年に発表したところによると、ユー地向斜とミオ地向斜が配列するとき、両者の間に位置するものをミオ地背斜隆起とよび、ユー地向斜を隔てた反対側に位置するものをユー地背斜隆起とよんで区別される。

 地背斜という用語は、プレートテクトニクス説の登場によって、地向斜という言葉が使われなくなったのに伴い、現在では使われていない。

[村田明広]

[参照項目] | 地向斜

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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