网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 East Antarctic Shield
释义

East Antarctic Shield

英语百科

East Antarctic Shield

Figure 1. Map of East and West Antarctica separated by the Transantarctic Mountain Range
The blue line represents the path traveled by the East Antarctic Shield over the past 550 million years. Red numbers indicate the time (millions of years ago); the yellow dot represents the south pole.
Proposed reconstruction of Rodinia for 1.1 Ga.[4]  Red dots indicate 1.3–1.5 Ga A-type granites.
The configuration of the continents during the time of Gondwana. The location of the Pan-African Orogeny, Lutzow Holm belt and many other features caused by the interaction between the East Antarctic Shield and the surrounding plates.

The East Antarctic Shield is a cratonic rock body that covers 10.2 million square kilometers or roughly 73% of the continent of Antarctica. The shield is almost entirely buried by the East Antarctic Ice Sheet that has an average thickness of 2200 meters but reaches up to 4700 meters in some locations. East Antarctica is separated from West Antarctica by the, 100–300 kilometer-wide, Transantarctic Mountains which span nearly 3,500 kilometers from the Weddell Sea to the Ross Sea. The East Antarctic Shield is then divided into an extensive central craton (Mawson craton) that occupies most of the continental interior and various other marginal cratons that are exposed along the coast.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/19 4:13:16