| dbo:abstract
|
- Limalok (formerly known as Harrie or Harriet) is a Cretaceous-Paleocene guyot/tablemount in the southeastern Marshall Islands, one of a number of seamounts (a type of underwater volcanic mountain) in the Pacific Ocean. It was probably formed by a volcanic hotspot in present-day French Polynesia. Limalok lies southeast of Mili Atoll and Knox Atoll, which rise above sea level, and is joined to each of them through a volcanic ridge. It is located at a depth of 1,255 metres (4,117 ft) and has a summit platform with an area of 636 square kilometres (246 sq mi). Limalok is formed by basaltic rocks and was probably a shield volcano at first; the Macdonald, Rarotonga, Rurutu and Society hotspots may have been involved in its formation. After volcanic activity ceased, the volcano was eroded and thereby flattened, and a carbonate platform formed on it during the Paleocene and Eocene. These carbonates were chiefly produced by red algae, forming an atoll or atoll-like structure with reefs. The platform sank below sea level 48 ± 2 million years ago during the Eocene, perhaps because it moved through the equatorial area, which was too hot or nutrient-rich to support the growth of a coral reef. Thermal subsidence lowered the drowned seamount to its present depth. After a hiatus lasting into the Miocene, sedimentation commenced on the seamount leading to the deposition of manganese crusts and pelagic sediments; phosphate accumulated in some sediments over time. (en)
- Limalok（原称Harrie或Harriet），是白垩纪—古新世时期成型的海底平顶山，是太平洋东南马绍尔群岛的一座海底山（水下火山）。它可能由今法属波利尼西亚一带的火山热点形成。Limalok坐落于米利環礁和諾克斯環礁东南部，并通过火山脊与两座环礁相连。其位置距海平面深约1,255米（4117英尺），并且有一个面积约636平方千米（246英亩）的山顶平面。 Limalok由玄武岩构成，最初可能是一座盾狀火山。、、、可能都参与了Limalok的形成。火山活动停止后，Limalok逐渐被侵蚀和削平，在古新世和始新世时期，上面形成了一个碳酸化的平面。这些碳酸主要由红藻生成，红藻会形成环礁状或类环礁状的结构以及暗礁。 山顶平面可能在48±2百万年前的始新世沉入海底，原因可能是当其经过赤道地区时，珊瑚礁因温度较高或有丰富营养物质而得以持续生长，后受作用下沉到目前的高度。在中新世时期，山体沉降开始，导致锰结壳与浮游沉积物的沉积形成。随着时间的推移，部分沉积物中积聚起磷酸鹽。 (zh)
|
| rdfs:comment
|
- Limalok（原称Harrie或Harriet），是白垩纪—古新世时期成型的海底平顶山，是太平洋东南马绍尔群岛的一座海底山（水下火山）。它可能由今法属波利尼西亚一带的火山热点形成。Limalok坐落于米利環礁和諾克斯環礁东南部，并通过火山脊与两座环礁相连。其位置距海平面深约1,255米（4117英尺），并且有一个面积约636平方千米（246英亩）的山顶平面。 Limalok由玄武岩构成，最初可能是一座盾狀火山。、、、可能都参与了Limalok的形成。火山活动停止后，Limalok逐渐被侵蚀和削平，在古新世和始新世时期，上面形成了一个碳酸化的平面。这些碳酸主要由红藻生成，红藻会形成环礁状或类环礁状的结构以及暗礁。 山顶平面可能在48±2百万年前的始新世沉入海底，原因可能是当其经过赤道地区时，珊瑚礁因温度较高或有丰富营养物质而得以持续生长，后受作用下沉到目前的高度。在中新世时期，山体沉降开始，导致锰结壳与浮游沉积物的沉积形成。随着时间的推移，部分沉积物中积聚起磷酸鹽。 (zh)
- Limalok (formerly known as Harrie or Harriet) is a Cretaceous-Paleocene guyot/tablemount in the southeastern Marshall Islands, one of a number of seamounts (a type of underwater volcanic mountain) in the Pacific Ocean. It was probably formed by a volcanic hotspot in present-day French Polynesia. Limalok lies southeast of Mili Atoll and Knox Atoll, which rise above sea level, and is joined to each of them through a volcanic ridge. It is located at a depth of 1,255 metres (4,117 ft) and has a summit platform with an area of 636 square kilometres (246 sq mi). (en)
|
