Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2110/jsr.2005.029 |
Discontinuity-bounded alluvial sequences of the southern gangetic plains, India: Aggradation and degradation in response to monsoonal strength | |
Gibling, MR; Tandon, SK; Sinha, R; Jain, M | |
通讯作者 | Gibling, MR |
来源期刊 | JOURNAL OF SEDIMENTARY RESEARCH |
ISSN | 1527-1404 |
出版年 | 2005 |
卷号 | 75期号:3页码:369-385 |
英文摘要 | Discontinuity-bounded late Quaternary sequences in the southern Gangetic Plains (Himalayan Foreland Basin) reflect flood-plain aggradation and degradation in response to forcing by the powerful Southwest Indian Monsoon. The major Himalayan and cratonic rivers in this area occupy narrow, incised valleys and do not inundate the adjoining broad interfluves, which display soil development, small plains-fed rivers, lakes, eolian deposits, and badland ravines. However, these areas formerly experienced active alluviation because thick flood-plain muds underlie the interfluve. An age model suggests that interfluve areas near the major rivers aggraded periodically between about 27 ka and 90 ka (Marine Oxygen Isotope Stages 3-5). They subsequently degraded or accumulated sediment only locally, probably reflecting decreased monsoonal precipitation around the Last Glacial Maximum (Marine Isotope Stage 2), when major river valleys moved to an underfit condition. Increased precipitation during the 15 to 5 ka period of monsoon recovery probably increased discharge and promoted incision and widespread badland formation. Discontinuities at deeper levels reflect earlier degradation phases, and are marked by reworked gravel lenses, thin channel bodies, and carbonate-cemented surfaces. Carbonate veins (infilled joints) that cut strata below but not above one discontinuity suggest some local tectonic influence. There is no evidence that sea-level fluctuations influenced stratal patterns in this elevated, inland region. Discontinuity-bounded sequences linked to climate change may characterize alluvial successions in many continental settings, especially along the cratonic margins of foreland basins, where subsidence rates are modest. |
类型 | Review |
语种 | 英语 |
国家 | Canada ; India ; Denmark |
收录类别 | SCI-E |
WOS记录号 | WOS:000229126200004 |
WOS关键词 | FORELAND BASIN DEVELOPMENT ; CENTRAL GANGA PLAIN ; LUMINESCENCE CHRONOLOGY ; SEA-LEVEL ; CLIMATE-CHANGE ; THAR DESERT ; STIMULATED LUMINESCENCE ; WESTERN INDIA ; CENTRAL NEPAL ; SUB-HIMALAYA |
WOS类目 | Geology |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/149787 |
作者单位 | (1)Dalhousie Univ, Dept Earth Sci, Halifax, NS B3H 3J5, Canada;(2)Univ Delhi, Dept Geol, Delhi 110007, India;(3)Indian Inst Technol, Dept Civil Engn, Kanpur 208016, Uttar Pradesh, India;(4)Riso Natl Lab, Radiat Res Dept, DK-4000 Roskilde, Denmark |
推荐引用方式 GB/T 7714 | Gibling, MR,Tandon, SK,Sinha, R,et al. Discontinuity-bounded alluvial sequences of the southern gangetic plains, India: Aggradation and degradation in response to monsoonal strength[J],2005,75(3):369-385. |
APA | Gibling, MR,Tandon, SK,Sinha, R,&Jain, M.(2005).Discontinuity-bounded alluvial sequences of the southern gangetic plains, India: Aggradation and degradation in response to monsoonal strength.JOURNAL OF SEDIMENTARY RESEARCH,75(3),369-385. |
MLA | Gibling, MR,et al."Discontinuity-bounded alluvial sequences of the southern gangetic plains, India: Aggradation and degradation in response to monsoonal strength".JOURNAL OF SEDIMENTARY RESEARCH 75.3(2005):369-385. |
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