摘要
东灵山是北京西山的最高峰,海拔2303m,位于北京市门头沟区斋堂镇西北约56km 处,地理座标为北纬34°2′,东经115°58′。它在地貌上属于亚高山,是洞察北京西山第四纪有无冰川作用最重要的一个窗口。事实证明,自第四纪以来,这里虽未发生过山岳冰川作用,但冰缘现象还能见到若干。现代山顶附近生长着灌丛和草甸,冰缘作用较弱。已发现的冰缘现象有下列几种:
Dongling mountain located no the border between Beijing City and Hebei Province is the highest peak (2303m) among the West Mountains of Beijing.Both ancient and recent perig- lacial phenomena have been developed.Six kinds of periglacial phenomena are found:tors, block field,talus,stone stream,periglacial loess and turf. Both ancient and recent periglacial phenomena are genetically related with each other on the Dongling Mt.In the late pleistocene,themean annual temperature was about 7—9℃ than on the top of Dongling Mt.and about 18—19℃ lower than that at present on the Beijnig plain. There was a periglacial stage in the late glacial age of the Quaternary on the Dongling Mt area, and hece it is called the Dongling periglacial stage,but the present stage is a sub-periglaciai period.
出处
《地质科学》
CAS
CSCD
北大核心
1992年第1期100-102,共3页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
中国科学院地质研究所科学基金资助
关键词
冰缘
冰缘期
东灵山
Dongling Mountain
Periglactal phenomena
Periglacial stage
