Geology by Design (Design Series)

Geology by Design (Design Series)

Author:Carl Froede Jr.
Language: eng
Format: mobi
Tags: Science, RELIGION / Sciences / Geology, RELIGION / Religion &#38
ISBN: 9781614581666
Publisher: Master Books
Published: 2007-08-31T16:00:00+00:00


Figure 8-1. Diagram showing changes in ripple mark development with increased water flow velocity (modified from Nichols 1999, Figure 4.9, p. 45).

Individual ripple crest symmetry provides information related to the direction of water or air movement and its energy (Collinson and Thompson 1989; Pettijohn and Potter 1964; Potter and Pettijohn 1977; Reineck and Singh 1980; Ricci-Lucchi 1995; Selley 1988). Ripples with perfect symmetry reflect oscillatory wind/water movement (i.e., bi-directional), while asymmetrical ripples reflect current flow in a single direction (Stow 2005). They can also form into complex shapes indicative of multi-directional water or air movement (Figure 8-2).



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