Timing and style of crustal extension N of the Scottish mainland

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Abstract
The region immediately to the N of the Scottish mainland and W of Orkney and Shetland may be divided into two areas on grounds of structural style. The two areas are separated by a well-defined NE-SW-trending horst, the Solan Bank High. The northwestern area is dominated by listric normal faults downthrowing to the NW. These faults were initiated at two main stages: late, or post Permo-Triassic (but pre-middle Jurassic) and middle Jurassic. A well-defined NW-SE-trending transfer (strike-slip) fault, termed here the Judd fault, is associated with the middle Jurassic faults. The southeastern area is dominated by listric normal faults down-throwing to the SE. These faults were initially Caledonian thrusts which subsequently relaxed during the Permo-Triassic.