Deep structure of the continental lithosphere in an unextended orogen: An explosive-source seismic reflection profile in the Urals (Urals Seismic Experiment and Integrated Studies (URSEIS 1995))

Tectonics ◽  
1998 ◽  
Vol 17 (2) ◽  
pp. 143-157 ◽  
Author(s):  
David N. Steer ◽  
James H. Knapp ◽  
Larry D. Brown ◽  
Helmut P. Echtler ◽  
Dennis L. Brown ◽  
...  
1984 ◽  
Vol 75 (2) ◽  
pp. 97-109 ◽  
Author(s):  
J. Hall ◽  
J. A. Brewer ◽  
D. H. Matthews ◽  
M. R. Warner

ABSTRACTThe Western Isles–North Channel (‘WINCH’) deep seismic reflection profile runs through the North Channel across the extension of the Midland Valley into the Firth of Clyde.A variety of shallow Carboniferous and younger sedimentary basins dominates the upper crustal structure. The deep structure includes a reflective lower crust, bounded downwards by the Moho, and dipping ‘thrusts’. No margins to the Midland Valley are observed equivalent to the bounding faults on land. Thrusts below both the Highlands and the Southern Uplands have a variety of dip directions indicative of zig-zag crustal shortening of 100 km in the Highlands and 60 km in the Southern Uplands.The Moho varies only a little in depth, despite the gross crustal deformation in the Caledonides. Isostatic recovery of the Moho on unlocking of collided crustal blocks may explain the formation of some sedimentary basins.


Geology ◽  
1999 ◽  
Vol 27 (1) ◽  
pp. 79 ◽  
Author(s):  
Ernest H. Rutter ◽  
Jalal Khazanehdari ◽  
Katharine H. Brodie ◽  
Derek J. Blundell ◽  
David A. Waltham

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