The sediments and volcaniclastic sediments are of Precambrian Uriconian age and were deposited in rifts and basins that would have been sub-parallel to the back arc basin as subduction continued.
12.
Given the steep dip of the Uriconian rocks relative to the shallow inclination of the Cambrian, the Uriconian the tectonic events can be classed as pre-Atdabanian ( Stage 2, Lower Cambrian ).
13.
Given the steep dip of the Uriconian rocks relative to the shallow inclination of the Cambrian, the Uriconian the tectonic events can be classed as pre-Atdabanian ( Stage 2, Lower Cambrian ).
14.
The sediments of the Uriconian are indicated to have been deposited rapidly with such volcanism being dated ( U-Pb Zircon ) at 566 + /-2Ma ( Note the Uriconian is cross-cut by the Late Precambrian Ercall Granophyre dated 560 + /-1Ma . ) The sequence is dominated by pyroclastic deposits, breccias and welded tuffs which is suggestive of a former volcanic centre being in close proximity and deposition in a subaerial environment.
15.
The sediments of the Uriconian are indicated to have been deposited rapidly with such volcanism being dated ( U-Pb Zircon ) at 566 + /-2Ma ( Note the Uriconian is cross-cut by the Late Precambrian Ercall Granophyre dated 560 + /-1Ma . ) The sequence is dominated by pyroclastic deposits, breccias and welded tuffs which is suggestive of a former volcanic centre being in close proximity and deposition in a subaerial environment.
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