Yarmouthian

About: Yarmouthian is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 723 citations.

Quaternary geology and geomorphology of South America

Abstract: Physical geography of South America quaternary tectonics of South America quaternary volcanism in South America characteristics of the quaternary volcanic zones quaternary of the alluvial basins structure and quaternary stratigraphy quaternary of the alluvial basins aeolian features - paleoclimate quaternary of the South American Highlands - Highlands of the Brazilian Shield quaternary of the South American Highlands - case studies in Southeast Brazil Campos de Jordao and Serra de Itatiaia quaternary of the South American Highlands the Northern and Southern Highlands the glaciers and glacial landforms of South America late Cenozoic glacial history of the Andes - late Miocene-Middle Pleistocene, the late quaternary (isotope stages 7-3), the last glaciation maximum (isotope stage 2), the late-glacial and holocene quaternary gravel formations of southern South America quaternary palaeolakes of the arid regions of South America quaternary geocryogenic features of South America and the Falkland Islands (Islas Malvinas) quaternary of the South American coasts quaternary palnological studies in South America - pre-quaternary-late-quaternary, the last glaciation palaeoecology of the late-glacial and holocene intervals the quaternary of South America - overview and implications.

Division of glaciation and correlation between the Quaternary glaciation in China and the marine isotope stage

Abstract: With the development of Quaternary glacier research and the increase of the absolute ages,comparison of glacial sequence and marine isotope stage(MIS) is better than before.The further division of glaciation(glacial stage) and interglacial(interglacial stage) lead to the emergence of some problems reflected by the influence of the procedures of traditional glaciation on the comparison between Quaternary glaciation in China and MIS.The main problems are as follows: the glacial sequence with absolute ages corrected the previous glaciation division according to the relative geomorphology,however,the modified results have not propagated as soon as possible.The correlation between glaciation and the even stage of MIS is not reasonable.Logical contradiction exists in the comparison between the glaciation,interglacial and MIS.An abuse of double name with time and location of the glacial sequence exist in the division of Quaternary glaciation in China at present.According to the comparison between Quaternary glaciation in China and MIS,together with the research of control of climate change and tectonic movement on the evolution of the geomorphology,main conclusions can be drawn as follows.(1) It is useful to find one or more new events of Quaternary glacial advance when correlating the glaciation(glacial stage) or inter-glacial(stage) to the even stage of the MIS in the future.(2) As the influence of 100 ka ratio of the earth orbit,the glacial development in China has been greatly influenced by the major climate change since the middle Pleistocene.The glacial extents are accordant with the global ice volume from the Kunlun glaciation to Zhonglianggan glaciation.However,the glacial extents of the early and/or middle stages were not consistent with the global ice volume during the last glacial cycle.It is intensively indicated that the glacial occurrence might depend on the coupling control of the regional climate and the tectonic uplift.The name of different glacial sequences should be modified considering the suitable application and convenient correlation in different regions.The authors recommend that the Dali glaciation and Guxiang glaciation should be used to replace the last glacial cycle and penultimate glaciation respectively.More importantly,whatever the misunderstanding during the course of the correlation between the glacial sequence and the moraine isotope stage curves,lack of reliable and comparable absolute dating results leads to these questions unresolved

New progress about chronological studies of quaternary glaciation in qinghai-xizang plateau

Abstract: In Qinghai-Xizang Plateau 3—4 Quaternary glaciations were reconstructed. They are mainly based on the tectonic geomorphological and climatic cycles and the stratographic comparison. However, the absolute ages of tills are not enough. In 1985—1987 we investigated West Kunlun Mountains and obtained a series of dating data of till and Quaternary stratum since the Pleistocene.

Stages of the Ice Age

Abstract: Sequence of Glacial and Interglacial Stages Throughout the Glacial period of growth, culmination, and decline of the North American and European ice-sheets, the climate causing the snowfall and ice accumulation fluctuated to such an extent that the boundaries of the continental glaciation were alternately advanced and checked or drawn back. North America had five stages of widely extended icefields. First was the long time of Nebraskan glaciation, followed by a great recession of the ice-borders during an interglacial stage named Aftonian, from its stratified beds and fossils near Afton, in southwestern Iowa. The second and maximum extension of ice accumulation is named, in the Keewatin area of its outflow west of the Mississippi, the Kansan stage, which was broken by the Yarmouth interval of ice melting and retreat. With the Kansan glaciation, but in part spreading across the eastern edge of its drift sheet and melting later from the Mississippi, . . .