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ミシシッピ川

3 件の記事

Monks Mound, located at the Cahokia Mounds near Collinsville, Illinois, is the largest Precolumbian earthwork north of Mesoamerica and a World Heritage Site.

アメリカ中西部ハートランドの歴史、地理、そして経済的役割

アメリカ中西部ハートランド五大湖グレートプレーンズ
Components of an artificial levee: Design high water level (HWL)Low water channelFlood channelRiverside slopeRiverside banquetteLevee crownLandside slopeLandside banquetteBermLow water revetmentRiverside landLeveeProtected lowlandRiver zone

堤防(レビー)の仕組みと役割自然の形成から人工的な治水まで

堤防レビー治水洪水対策
An illustration of the likely formation history of the Southern Oklahoma Aulacogen. In A, volcanoes form along a continental plate boundary. B shows the triple junction's basic appearance following its formation. C shows that one of the three "arms" has not split while the other two do, continuing into D, in which the Iapetus Ocean forms.

アウラコゲンとは何か?プレートテクトニクスが残した「失敗したリフト」の正体

アウラコゲンプレートテクトニクストリプルジャンクションリフト帯