Fluvial Depositional Systems by Andrew Miall

By Andrew Miall

This publication is meant to counterpoint the author's 1996 publication "The geology of fluvial deposits", to not exchange it.

The booklet summarizes tools of mapping and interpretation of fluvial depositional structures, with an in depth remedy of the tectonic, climatic and eustatic controls on fluvial depositional methods. It makes a speciality of the preserved, historical depositional list and emphasizes large-scale (basin-scale) depositional approaches. Tectonic and climatic controls of fluvial sedimentation and the consequences of base-level swap on series structure are mentioned. Profusely illustrated and with an intensive connection with the new literature, this e-book should be welcomed by means of the scholar geologist alike.

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One of the most recent treatises on fluvial sedimentology is that by Bridge (2003), in which much of the evolution of ideas (including that discussed here) about the causes of meandering and braiding, and the controls on fluvial style, is challenged. Bridge (2003, pp. 153–154) rightly notes the importance of the “channel-forming discharge” in determining fluvial styles. This category of event may correspond to the bankfull discharge or to the seasonal maximum discharge, or to 42 2 The Facies and Architecture of Fluvial Systems some rarer, larger-scale event, depending on the river system.

One of the most recent treatises on fluvial sedimentology is that by Bridge (2003), in which much of the evolution of ideas (including that discussed here) about the causes of meandering and braiding, and the controls on fluvial style, is challenged. Bridge (2003, pp. 153–154) rightly notes the importance of the “channel-forming discharge” in determining fluvial styles. This category of event may correspond to the bankfull discharge or to the seasonal maximum discharge, or to 42 2 The Facies and Architecture of Fluvial Systems some rarer, larger-scale event, depending on the river system.

38–42; Collinson 1986, p. 59–60; Shanley 2004). 32 2 The Facies and Architecture of Fluvial Systems While noting the inadequacy of vertical profile data, the suggested solutions are in fact variations on this same approach. Thus, Leclair and Bridge (2001) explored the relationship between crossbed thickness and bedform height so that the known dependence of bedform height on flow depth may be used to estimate channel depth. Use of this relationship for subsurface analysis depends on being able to obtain useful information about crossbed thickness from vertical profile data.

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