Sedimentary cycle

Japanese: 堆積輪回 - たいせきりんね（英語表記）sedimentary cycle

A sedimentary phenomenon in which several strata are repeatedly stacked in a certain order. Also called a sedimentary cycle. In large-scale cycles, the thickness of each unit cycle can reach several meters to several hundred meters, and their development is regulated by crustal activity such as marine transgression/regression, sea-level change (change in sea level), and land subsidence/uplift. The vast coal-bearing seams that develop in stable regions of North America and Europe show typical large-scale cycles, but the main cause is that in these vast flat areas, slow up-and-down movements of the earth's crust (also called epigeism) or sea-level changes caused the seawater to spread and become a shallow marine environment, or the seawater to retreat and become a freshwater environment, causing the coal-bearing seams to develop in low-lying marshes.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

いくつかの地層が一定の順序で繰り返し累重する堆積現象。堆積サイクルともいう。大規模なサイクルは単位サイクルの厚さが数mから数百mに達し，海進･海退現象または海水準変動(海水面変化)，地盤の沈降･隆起といった地殻活動によって発達が規制される。北アメリカやヨーロッパの安定地域に発達する広大な含炭層は典型的な大規模サイクルを示すが，そのおもな原因はこれらの広大な平坦地域が緩慢な地殻の上下運動(造陸運動ともいう)または海水準変動によって，海水が広がって浅海環境になったり，それが退いて淡水性の環境になり，低平湿原に含炭層を発達させた。

出典　株式会社平凡社世界大百科事典第２版について　情報

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