. Geology and mineralogy considered with reference to natural theology. 4Tee£. Circular ridges and depressions on the Burrstone, in the I. of Portland, round an erectstump of a tree, four feet high. Sketched by Professor Henslow, 1832. Fig. 3. Lower Purbeck bedscomposed of calcare-ous slate of Soft burrstone. Anciefit forest in thedirt bed. Portland stone ofmarine formation. Section of the Cliff east of Lvlworth Cove, Dorset. Buckland. PL .58.

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