Evidence from palaeosols, palaeokarsts and styles of meteoric diagenesis shows that the early Carboniferous climate of southern Britain was dominantly seasonally semi-arid. This semi-aridity occurred while the region was in an equatorial palaeolatitudinal position. The cause of the seasonal aridity was possibly the deflection of easterly winds into a major low pressure zone set up over Gondwana during the southern hemisphere summer.

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