A movable beast:glaciation in the Ediacaran  

作　　者：Joseph L.Kirschvink 

机构地区：[1]Division of Geological&Planetary Sciences,California Institute of Technology,USA [2]The Marine Core Research Institute,Kochi University,Japan

出　　处：《National Science Review》2023年第8期113-114,共2页国家科学评论（英文版）

摘　　要：Ediacaran time(635–543 million years ago[Ma])represents the dawn of macroscopic life following two Neoproterozoic Snowball Earth episodes[1],where a runaway ice-albedo effect caused the entire planet to become engulfed in ice[2,3].(During Phanerozoic time,glaciation on Earth was limited to mid-to-high latitudes[4].)Large fossils resembling animals first appeared shortly after the last Snowball[5]but questions remain about the environment in which animal life first took hold.An enduring Ediacaran enigma is the occurrence of multiple glacial deposits on multiple continents.Were they synchronous?Were they brief Snowballs?Did the retreat of glaciation spark animal life[1]?

关 键 词：EARTH GLACIATION LATITUDE 

分 类 号：P343.6[天文地球—水文科学]