Daiichi-Kashima Seamount
Japan · Asia
About
Daiichi-Kashima Seamount is a guyot in the Pacific Ocean off Japan. It is about 3.5 kilometres (2.2 mi) high and reaches a depth of 3,540 metres (11, 610 ft). Daiichi-Kashima formed during the Barremian as a result of volcanic activity; during the Albian reefs formed on the seamount and generated a limestone cap. The seamount later. The seamount has been approaching the Japan Trench and a noticeable vertical offset of about 1.5 kilometres (0.93 mi) between the eastern and western halves of Daiichi-Kashima appears to be the result of normal faulting as the seamount enters the trench, with the western half dropping down; it may also reflect a past sector collapse when the volcano was still active.
Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.