C. T. Scrutton writes:

I read with interest R. A. Fairbairn's excellent article on the determination of the current directions dominant during the deposition of the Great Limestone in Northern England. The corals that he mentions, which occur in abundance at certain levels within the limestone, could provide some additional information on the conditions prevailing at the time.

The solitary rugosans, principally Dibunophyllum bipartitum, lived as straight to slightly curved coralla, more or less upright in the sediment and corresponding to type Evii and particularly Fvii coralla as illustrated in my recent paper (Scrutton 1998, fig. 14)....

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