The Jura Quartzite, which lies stratigraphically above the Bonahaven Dolomite and the Port Askaig (=Eocambrian) Tillite, is interpreted as a tidal-shelf deposit. A coarse facies, consisting of beach and tidal dune sediments, and several fine facies, comprising storm sediments, are recognised. It is the relationships between these facies that are critical to their interpretation. The proportion of fine facies increases towards the NNE, parallel with the palaeocurrent means. A model for tidal-shelf sedimentation is developed in which storms are the dominant factor in the preservation of dunes as well as in the production of storm layers.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:629355 |
| Date | January 1974 |
| Creators | Anderton, Roger |
| Publisher | University of Reading |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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