Page:Quarterly Journal of the Geological Society of London, vol. 26.djvu/544

 ft. in. ft. in.

3. "Pendle" — consisting of hard close limestone, very heavy and blue-hearted (a good rough building- stone), and of slaty or flaggy beds 4 6 to 5 6

The "Pendle" is divided into four divisions or beds : the upper two are each from 15 to 18 inches thick; beneath them is a bed of flags in about six layers, each 6 to 9 inches thick ; and below this is another bed of about the same thickness and character as the upper beds. A zone at the bottom of the last occasionally abounds with Echinobrissus, Acrosalenia, &c.

4. Sandy band in thin layers, which sometimes assumes the character of an earthy shale-bed, and is sometimes argillaceous, containing numerous oysters having the shells preserved, and occasionally fish-palates 0 9 to 1 0

5. " Marly bed " — soft calcareous material, burnt for lime — in two divisions, and containing numerous Pholadomyoe 2 0 to 2 6

6. " Sandstone " — an arenaceous limestone, soft, but hardening upon exposure — a good building-stone — in two divisions, and containing few fossils 3 0 to 4 0

7. " Bottom marly bed " — very soft and " rammelly," burnt for lime, very full of fossils— Terebratula maxillata (very perfect), Modiola imbricata, Acrosalenia, &c. ... 3 0 to 3 6

8. Soft clayey band, with the same fossils, and fish-palates 0 6 to 0 9

9. " The Blocks " — open, freely working oolitic limestone- sawn up and faced for flooring, window-sills, chimney- pieces, &c. — contains Nautilus Baberi, N. subtruncatus, Clypeus Mulleri, and C. Plotii 2 6 to 3 0

I have also obtained from this bed two specimens of a large smooth Ammonite, about 16 inches in diameter, probably of the same species as that from Kingsthorpe in the Baker collection in the British Museum, referred to in my description of that section*.

10. Very hard blue-hearted stone, with some fossils 1 0 to 1 3

11. Blue Clay 1 0 to 2 0

12. Blue close stone, much fissured, and with very open joints 1 0 to 1 6

13. Blue Clay.

The last three beds are below the level of the ordinary working, and are given only upon the report of the quarrymen.

I have from this quarry (I think from one of the beds of the "Pendle," No. 3) a fish, Pholidophorus Flesheri, Ag. Agassiz describes and figures an example of this fish (Poissons Fossiles, tom. 2, p. 281, t. 37. fig. 8), but gives as its bed and locality the "Inferior Oolite, Blisworth." I have a strong impression, favoured by the appearance of the figure and its matrix in the plate, that Agassiz's fish came from the same bed as mine, and that his, as well as my fish, belongs to the fauna of the Great, and not of the Inferior, Oolite.

About a quarter of a mile N.W. of the Limestone Quarry is the Blisworth Ironstone Pit at d d ; of which the following is a section : —

Section of Ironstone Pit at Blisworth. ft. in.

1. Surface soil 1 0

2. Soft calcareous marl— decomposed limestone (?) 1 6

3. Hard limestone, somewhat shivered 1 3

an old and smooth example of A. gracilis, Buckman.
 * One of these Ammonites has been identified by Professor Morris, F.G.S., as