Yamatotai

Japanese: 大和堆 - やまとたい

A shallow area of about 300m deep near the northern end of the shallow area that runs from Oki Island to the northeast in the central part of the Sea of Japan. The shallowest point is 286m. Separated from the intermediate area of more than 2000m deep is the Kitayamato Bank, which is 397m deep at its shallowest point. In 1926, the survey ship Yamato surveyed it and named it Yamato Bank. It is a huge shallow area with a short diameter of 20km and a long diameter of 130km. The top of the bank is flat, and in the southern part, granite and gneiss are exposed. Gravel, sand, and foraminifera fossils have been found on the bank, and the rock types of the gravel include granite, andesite, rhyolite, and sandstone, and most of these gravel are rounded. There is an upwelling current near the bank, which makes it a good fishing ground for mackerel, hairtail, and other fish.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

日本海中央部の，隠岐島から北東にかけて続く浅瀬の北端付近にある水深約 300mの浅瀬。最浅点 286m。中間に 2000m以上の深所をへだてて，北に最浅点 397mの北大和堆がある。 1926年測量艦『大和』が精査して大和堆と命名した。短径 20km，長径 130kmの巨大な浅瀬である。堆の頂上は平坦で，南部に花崗岩や片麻岩が露出しているところがある。堆の上には礫，砂，有孔虫化石が発見され，礫の岩質は花崗岩，安山岩，流紋岩，砂岩などで，これらの礫は円礫が多い。堆付近には湧昇流があり，サバ，タチウオなどの好漁場となっている。

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