The Loess/Paleosol record and the nature of the younger Dryas climate in central China     

David B. Madsen  Li Jingzen  Robert G. Elston  Xu Cheng  Robert L. Bettinger  Geng Kan  P. Jeff Brantingham  Zhong Kan 《Geoarchaeology》1998,13(8):847-869

The use of latest Pleistocene-Holocene paleosols in defining Chinese climatic sequences is plagued by poor chronological controls caused primarily by the use of radiocarbon dates derived from bulk soil carbon. Dating of a post-glacial aeolian/paleosol sequence in the Pigeon Mountain basin of north-central China, using culturally deposited charcoal, support a wide array of other data suggesting the Younger Dryas was a period of cooler dryer conditions marked by wide-spread aeolian deposition. Periods of soil formation and higher lake levels bracket this climatic event. Climatic variability immediately before, during and immediately after the Younger Dryas interval is associated with rapid technological elaboration and innovation in the production and use of chipped stone tools, and perhaps, ground stone. © 1998 John Wiley & Sons, Inc.  相似文献   

Mechanical and biodeterioration behaviours of a clayey soil strengthened with combined carrageenan and casein     

Ni  Jing  Li  Shan-Shan  Geng  Xue-Yu 《Acta Geotechnica》2022,17(12):5411-5427

Acta Geotechnica - In the last decade, biopolymers have been used as organic soil binders in ground improvement and earthen construction material modification. Although biopolymer-treated soils...  相似文献