A BORING IN THE MILLSTONE GRITS, ROD MOOR, SHEFFIELD

Abstract

In 1933 a borehole was sunk in the upper part of the Millstone Grit Series of the grit moors west of Sheffield from the base of the Coal Measures to well within the Rivelin or Main Third Grit. The total thickness passed through was 465½ feet. I have been enabled to examine the cores by the courtesy of the Wortley Rural District Council. Mr. F. E. G. Watson, of Le Grand, Sutcliff and Gell, the boring engineers, has taken a continued interest in the investigation, and I wish to thank him for the kind assistance that he has given. My thanks are due to Prof. W. G. Fearnsides, F.R.S., for his kindness in allowing me to carry out office work in the Department of Geology at Sheffield University. The borehole site (at 1,050 ft. O.D.) is in the north corner of the railed-off portion of the field on the flank of Rod Moor, half a mile north-west of Load Brook, and six miles west of the centre of Sheffield. [Yorks. 6″ map, 293 N.E.] Originally a borehole was commenced near the track to Load Brook about 1,000 ft. SSE. of the final hole, but after passing through several feet of massive sandstone a NW. fault throwing down to the NE. was struck, and the hole was abandoned. The succession passed through in the second hole was as follows: — | Succession. | Description | Thickness | Depth | |:----------------------------------------------------------------------------- | ----------- | --------- | ----- | --- | | | | ft. | in. | ft. | in. | | Lower Coal Measures. (Pot clay marine band at base not noted by borer but ... | | | | | |