Flaser bed

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Flaser beds are a sedimentary bedding pattern created when a sediment is exposed to intermittent flows, leading to alternating sand and mud layers. While flaser beds typically form in tidal environments, they can (rarely) form in fluvial conditions - on point bars or in ephemeral streams.[1] Individual sand ripples are created, which are later infilled by mud during quieter flow periods.[1] These mud drapes are typically a minor constituent of the deposit; they can consolidate within three hours, protecting the underlying layer from erosion.[1] Flaser bedding typically forms in high-energy environments.[2] [3]

[edit] References

  1. ^ a b c Martin, A.J. (2000). "Flaser and wavy bedding in ephemeral streams: a modern and an ancient example". Sedimentary Geology 136 (1-2): 1-5. 
  2. ^ Tom Bellile (10-23-03). Tidal deposits. (with photograph)
  3. ^ Reineck, H.E.; Wunderlich, F. (1968). "Classification And Origin Of Flaser And Lenticular Bedding". Sedimentology 11 (1-2): 99-104. doi:10.1111/j.1365-3091.1968.tb00843.x. 
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