Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1139/cjes-2022-0001 |
| Revisiting Huronian paleoslopes | |
| Long, Darrel G. F. | |
| 通讯作者 | Long, DGF |
| 来源期刊 | CANADIAN JOURNAL OF EARTH SCIENCES
 |
| ISSN | 0008-4077 |
| EISSN | 1480-3313 |
| 出版年 | 2023 |
| 卷号 | 60期号:7页码:752-764 |
| 英文摘要 | It is commonly assumed that the gradients of pre-vegetation fluvial systems were greater than those of modern rivers. If the measured thickness of crossbeds is first corrected for post-depositional compaction, using thin-section-based observations, the corrected thickness data can be applied to a new suite of formulae, based on observations of >4000 modern rivers, to provide more realistic paleohydrological reconstructions of ancient river systems. Using this approach, after correction for 36% compaction, the average slope of the rivers that deposited the Mississagi Formation was calculated as 0.0013 m/m (0.0005- 0.0026), with an average bankfull channel depth of 2.67 m. The slope of Serpent Formation rivers, after correction for 33.5% compaction, averaged 0.0007 m/m (0.0003-0.0016), with an average bankfull channel depth of 5.85 m. The calculation of slopes using this approach on these Paleoproterozoic and other Precambrian systems indicates that primary river gradients were similar to modern rivers, falling well below the depositional gap, of 0.007-0.026 m/m, between modern rivers and arid-region fans, negating the long-held idea that pre-vegetation rivers had higher slopes than their modern counterparts. |
| 英文关键词 | Paleohydrology paleoslopes Huronian Precambrian compaction rivers |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000923245900001 |
| WOS关键词 | PALEOPROTEROZOIC SERPENT FORMATION ; GA WATERBERG GROUP ; CHANNEL SINUOSITY ; SOUTH-AFRICA ; PALEOHYDROLOGICAL DATA ; MISSISSAGI FORMATION ; PALEOCURRENT DATA ; CHEMICAL INDEX ; HIGH OBLIQUITY ; ARCHITECTURE |
| WOS类目 | Geosciences, Multidisciplinary |
| 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/2XILL650/395636 |
| 推荐引用方式 GB/T 7714 | Long, Darrel G. F.. Revisiting Huronian paleoslopes[J],2023,60(7):752-764. |
| APA | Long, Darrel G. F..(2023).Revisiting Huronian paleoslopes.CANADIAN JOURNAL OF EARTH SCIENCES,60(7),752-764. |
| MLA | Long, Darrel G. F.."Revisiting Huronian paleoslopes".CANADIAN JOURNAL OF EARTH SCIENCES 60.7(2023):752-764. |
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