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Koa'e Fault Zone : ウィキペディア英語版 | Koa'e Fault Zone
File:100 4359kilauea.JPG|Large ground cracks in the Koa'e Fault Zone on Kilauea Volcano.
The Koa’e Fault Zone (pronounced coe-wah-hee) is a series of fault scarpes connecting the East and Southwest Rift Zones on Kilauea Volcano on the big island of Hawaii. The fault zone intersects the East Rift near the Pauahi Crater and extends nearly 12 kilometers in an east-northeast direction towards the westernmost boundary near Mauna Iki and the Southwest Rift Zone. Boundaries of the Koa’e Fault Zone also cover 2 kilometers in a north-south orientation along the 12 kilometer length. It is believed that the fault zone has been active for tens of thousands of years. The area is infrequently visited by park patrons due to the lack of eruptive activity and closure of certain areas to the general public. Features The Koa’e Fault Zone contains numerous thrust fault scarpes and ground cracks that are slowly moving towards the Pacific Ocean. The area is covered with pahoehoe lava flows dated between 700 and 500 years old. The exact number of lava flows in this region is debatable. Numerous exposed scarpes have very poor distinctions between various lava flows due to weathering of the basalt. Because Kilauea has erupted explosively in the past, the Koa’e Fault Zone is also covered with tephra deposits. The stratigraphy of the sediments contains many clues to the eruptive history of Kilauea Volcano. • 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Koa'e Fault Zone」の詳細全文を読む
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