About This Item
Share This Item
Abstract
Journal of Sedimentary Research, Section
A: Sedimentary Petrology and Processes
Vol. 65A (1995)No.
2. (April), Pages 423-430
The Gravel-Sand Transition Along River Channels
Gregory H. Sambrook Smith (*), Robert I. Ferguson
ABSTRACT
This paper discusses a hitherto neglected aspect of fluvial downstream
fining: the transition from a gravel bed to a sand bed. From the few known
examples and by additional study of new sites, some general features of
such transitions are given. These transitions are generally rapid and involve
a change in bed texture from unimodal gravels through bimodal sediments
to exclusively sand material and are often associated with a break in slope.
We propose three possible causes: local base level control an excess of
sand supply, and abrasion/breakdown of fine gravel. We further argue that
such transitions occur in a variety of fluvial environments and are geographically
more widespread than previously supposed, and on this basis we suggest
they may also aid in interpreting ancient sediment showing bimodality and
rapid proximal-to-distal changes in grain size.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 |
Watermarked Document A Watermarked Document is branded with the name of the original licensed customer to discourage unauthorized users from sharing the document outside the user's organization. The PDF is no longer restricted to one machine, but can be circulated to others in the same company or department. A Watermarked Document also can be printed for hard copy distribution internally but is not authorized for outside distribution nor posting on the internet. Users will not be able to cut-and-paste text or images from one document to another.
|
Open PDF Document: $24 |
Open Document An Open Document is a fully functional PDF that can be circulated (a digital copy or hard-copy printed documents) outside the purchasing organization. Purchase of an Open Document does NOT constitute license for republication in any form, nor does it allow web posting without prior written permission from AAPG/Datapages ([email protected]).
|
GIS Map Publishing Program