... and Hawick groups are divided by geochemical lineaments coincident with the Laurieston Fault. East of Moffat, the geochemical lineaments diverge towards the NE with Gala-type regional geochemistry (high Sr and Ba, low CaO) to the north of the Moffat Valley Fault, whilst Hawick-type regional geochemistry (low...

... sediment, an assessment of the latter allows variations in matrix composition to be taken into account. Examples are given from the Silurian turbidite sequences of the central and southern Southern Uplands (Gala, Hawick and Riccarton groups; the affinity of the Ross Formation with the Hawick Group...

... structures appear to record a single regional phase of subhorizontal NW–SE contractional deformation, with a steeply dipping direction of bulk finite extension. These structures are markedly different from those developed in rocks correlated with the Upper Llandovery Hawick Group exposed some 5 km...

... particularly instructive. Much of the Down-Armagh outcrop consists of Llandovery strata from the Gala and Hawick Groups, so it is this part of the terrane that is most closely considered. Though continuity is clear, there is a suggestion of additional structural imbrication in Down-Armagh, whilst variability...

...-propagating thrust stack which deformed the back-arc basin sequence and may eventually have ramped over the eroded and faulted remains of the volcanic arc. A southward-migrating foreland basin formed ahead of the rising thrust stack and is now represented by the late Llandovery Hawick Group and Wenlock...

... as in the Northern Belt. Southward this becomes markedly less pronounced, particularly in Down where the Central Belt is much wider than in Galloway. Distinctive Hawick Group lithologies permit the correlation of the southern parts of the sections. Large areas of predominantly southward-younging occur in each...

... and cleavage show a marked increase in the late Llandovery to early Wenlock strata of the Hawick Group (including the Ross Formation, which was formerly assigned to the Riccarton Group). Therein, the main deformation (Dl) is well developed and although cleavage is domainal it is often pervasive through both...

... comprises Llandovery tracts of the Gala and Hawick Groups. A more detailed correlation has been established ( Barnes et al . 1987 ) for the Gala and Hawick tracts on either side of the North Channel, in the Rhins of Galloway (Scotland) and the Ards Peninsula (Northern Ireland). From this it is apparent...

... Uplands, sediments derived from the Shinnel Formation, Gala and Hawick groups all contain more Cr than the source rock, whereas over the Portpatrick Formation outcrop there is a decrease in Cr from rock to sediment. The Kirkcolm Formation shows little change. To the south, in the Lake District, both...

...Fig. 6. Geochemical differentiation of the Gala, Ettrick and Hawick groups with their component sandstones compositionally separated by Ni–Sr and CaO–SiO 2 abundances: after Barnes & Stone in Stone et al . (2012 , fig. 20). ...

... ; and the 1:100,000 geologic map of Ireland and the 1:650,000 geologic map of the UK with the permission of the British Geological Survey and the Irish Geological Survey). The thin gray lines show the general strike of the bedding in the Hawick Group. Composite cone sheets surrounding the Mourne granite...

... of the Southern Uplands are divided lithologically into the Gala and Hawick groups, the former essentially Aeronian in age, and the latter Telychian, although the Gala Group extends into the early Telychian and overlaps in age with the older part of the Hawick Group (R. P. Barnes in prep.). The pattern of strike...

.... The anomaly is caused by multiple dykes that cannot be resolved, and accordingly was termed the Acklington Dyke Group anomaly. The same anomaly is represented in the southern North Sea ( Underhill, 2009 ). The total length of the combined Moneyacres–Hawick-Acklington dykes, including the North Sea section...

... it decreases progressively from the NE to SW, suggesting a lateral variation in composition. The succeeding Gala and Hawick Group greywackes display low radon potential whilst the Riccarton Group greywacke - that is significantly richer in Rb and has a much higher Rb/Sr ratio than the Gala or Hawick Group...