SH6178 : Cross-bedding

taken 8 years ago, near to Llangoed, Isle of Anglesey/Sir Ynys Mon, Great Britain

This type of deposit is called cross-bedding, and indicates that the rock was laid down in flowing water. The current causes ripples, and sand cascades down the face of the ripple, forming a series of sloping laminations, and the ripple migrates downstream. When the channel alters slightly, the ripples can go in the opposite direction, forming another set of laminations sloping the other way. At other times in the evolution of the channel, sediment can be deposited in level laminations. All these patterns of deposition are well displayed in this exposure. For a closer view see SH6178 : Detail of Cross-bedding.
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SH6178, 30 images   (more nearby )
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Date Taken
Thursday, 20 May, 2010   (more nearby)
Thursday, 1 July, 2010
Geological feature   (more nearby)
Subject Location
OSGB36: geotagged! SH 6190 7870 [10m precision]
WGS84: 53:17.2333N 4:4.3863W
Camera Location
OSGB36: geotagged! SH 6190 7870
View Direction
WEST (about 270 degrees)
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