Page:Quarterly Journal of the Geological Society of London, vol. 35.djvu/880

no PROF. J. BTJCKMAN ON THE MIDFORD SANDS. poda-bed at Midford, Sherborne, and Bradford Abbas as sands; and it is interesting to mark how persistent they are over a wide area ; but we must guard against its being supposed that it is always so. On the contrary, at Ham Hill, and so far off as Doulting, in Somerset, the equivalents of these sand beds with occasional beds of shelly oolite will be made up wholly of shelly oolite, so much so as to afford thick masses of characteristic oolitic building-stones, for which both quarries have for ages been celebrated. In order to make this the more clear, we append the following : — Fig. 2. — Sections of Ham Hill and Doulting Quarries, Ham Hill. Doulting. Fossil-bed denuded, so that the whole of this section is below the Cepha- lopoda-bed. 1. Sand bed with enclosed block of shelly oolite. 2. Foxy-coloured thin-bedded Free- stone. 3. Freestone cut out in thick blocks. 1. Tbe sands denuded. " r- 2. "White thin -bedded Freestone. 3. Thick blocks of whi- | tish Freestone. J These sections may be detailed as follows : — Section at Mr. Trastts Quarry, Ham Hill. f t j n# 1. Sands including a portion of a ' pot-lid ' of shelly oolite 12 2. Ochre-beds = equalling in part the Leckhampton freestone bed 50 3. Beds of ochraceous building-stone made up of comminuted shells= 1 ^q q shelly oolite J 4. Rough grey stone — Pea Grit 10 5. Sands=the so-called Oolite Sands (Lias of Dr. Wright) at Cheltenham. Tt will be seen that the next quarry is by no means so deep a