On the Zones of the Lower Lias and the Avicula contorta Zone

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Abstract
In a paper on the above subject by Dr. T. Wright, F.G.S., which appeared in the ‘Journal of the Geological Society’ for November last, reference is made to the occurrence of the Avicula contorta zone at Beer-Crowcombe, near Ilminster, and a list of the organic remains from thence, amounting to thirteen species, furnished by the Rev. P. B. Brodie, is given. In the year 1847 that gentleman accompanied me to the locality, when the fossils thus noticed were obtained. Since that time I have much increased their number, and I have also been enabled to establish the exact relative position of the Avicula contorta bed, which at the time of our visit was not clearly known.

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