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DOI | 10.1038/s41467-020-16657-z |
A bedform phase diagram for dense granular currents | |
Smith, Gregory1; Rowley, Peter1,2,3; Williams, Rebecca1; Giordano, Guido4; Trolese, Matteo4; Silleni, Aurora4; Parsons, Daniel R.5; Capon, Samuel2 | |
2020-06-08 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2020 |
卷号 | 11期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Italy |
英文摘要 | Pyroclastic density currents (PDCs) are a life-threatening volcanic hazard. Our understanding and hazard assessments of these flows rely on interpretations of their deposits. The occurrence of stratified layers, cross-stratification, and bedforms in these deposits has been assumed as indicative of dilute, turbulent, supercritical flows causing traction-dominated deposition. Here we show, through analogue experiments, that a variety of bedforms can be produced by denser, aerated, granular currents, including backset bedforms that are formed in waning flows by an upstream-propagating granular bore. We are able to, for the first time, define phase fields for the formation of bedforms in PDC deposits. We examine how our findings impact the understanding of bedform features in outcrop, using the example of the Pozzolane Rosse ignimbrite of the Colli Albani volcano, Italy, and thus highlight that interpretations of the formative mechanisms of these features observed in the field must be reconsidered. In this study, Smith and colleagues employ analogue experiments to show the controlling parameters on sediment bedforms in pyroclastic density current deposits. The findings are applied and validated on natural deposits. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000541703300006 |
WOS关键词 | BASE-SURGE DEPOSITS ; MOUNT ST-HELENS ; PYROCLASTIC FLOWS ; SEDIMENTARY STRUCTURES ; VOLUME IGNIMBRITES ; ALBAN HILLS ; LAACHER-SEE ; BED FORMS ; VOLCANO ; EMPLACEMENT |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/274437 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Hull, Dept Geog Geol & Environm, Kingston Upon Hull, N Humberside, England; 2.Univ Portsmouth, Sch Earth & Environm Sci, Portsmouth, Hants, England; 3.Univ West England, Dept Geog & Environm Sci, Bristol, Avon, England; 4.Univ Roma Tre, Dipartimento Sci, Rome, Italy; 5.Univ Hull, Energy & Environm Inst, Kingston Upon Hull, N Humberside, England |
推荐引用方式 GB/T 7714 | Smith, Gregory,Rowley, Peter,Williams, Rebecca,et al. A bedform phase diagram for dense granular currents[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Smith, Gregory.,Rowley, Peter.,Williams, Rebecca.,Giordano, Guido.,Trolese, Matteo.,...&Capon, Samuel.(2020).A bedform phase diagram for dense granular currents.NATURE COMMUNICATIONS,11(1). |
MLA | Smith, Gregory,et al."A bedform phase diagram for dense granular currents".NATURE COMMUNICATIONS 11.1(2020). |
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