Henry Warburton

“ Not far from Logie, in the parish of Forfar, are the moss and loch of Resteneth, which about the year 1794 were entirely drained by a cut made into the loch of Rescobie, lying at the distance of half a mile on a lower level. Both the moss and loch contain shell marle: that in the moss is covered to the depth of five or six feet by line black peat, that in the loch not infrequently so. The marle does not lie in a horizontal bed, but shelves from the middle of the loch, where it is eleven feet thick, to the edges of the moss, where it does not exceed in thickness a few inches. ”

“ In thus comparing the magnesian breccia of Bristol with the yellow limestone of the northern and midland counties, I have assumed that the red marl which lies above the coal measures is of the same order with that which lies at the bases of those escarpments, where strata of mountain limestone are broken off; and where instead of the lower beds rising from beneath the limestone we find horizontal strata of red marl filling the plains. ”

“ I have heard of the following additional cases in which a magnesian breccia is found in connection with red marl. Dr. Wollaston in the first instance and afterwards Mr. Greenough informed me that a similar rock was found near to Cowbridge in South Wales, a specimen of which was presented by the latter to the Society. Mr. Aikin also has noticed a breccia of the same description at Caerdeston and Loton in Shropshire. ”