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Yesnaby Sandstone Group

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Type
  
Region
  
Named for
  
Country
  
Primary
  
Yesnaby Sandstone Group httpsuploadwikimediaorgwikipediacommonsthu

Sub-units
  
Qui Ayre Sandstone Formation, Harra Ebb Sandstone Formation

Overlies
  
unconformable on 'basement'

Other
  
siltstone, conglomerate

The Yesnaby Sandstone Group is a Devonian lithostratigraphic group (a sequence of rock strata) in west Mainland Orkney, Scotland. The name is derived from the locality of Yesnaby where the strata are exposed in coastal cliffs.

Contents

Outcrops

These strata are only exposed on either side of the Garthna Geo Fault in the Yesnaby area of west Mainland, Orkney.

Lithology and stratigraphy

The Group comprises the Qui Ayre Sandstone Formation and the Harra Ebb Sandstone Formation. The basal beds are talus and alluvial fan facies deposited in a fluvial or lake marginal environment probably during the Emsian Stage of the Devonian Period.

References

Yesnaby Sandstone Group Wikipedia


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