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Morris, John
1878.
I.—Eminent Living Geologists.
Geological Magazine,
Vol. 5,
Issue. 11,
p.
481.
Article contents
IV.—On the Occurrence of Boring Mollusca in the Oolitic Rocks1
Published online by Cambridge University Press: 01 May 2009
Extract
The occurrence of perforations due to Lithophagous mollusca has been frequently observed in the Oolitic rocks, viz. in the Inferior and Great Oolite, Cornbrash, Coral-rag, and Portland beds. During a recent visit, with some of the students of the Agricultural College, Cirencester, to a quarry near there, further evidence of a similar fact was obtained. The quarry is situated near the canal on the farm land of Mr. Sargeant, and has been long worked for road stone and building stone, and, according to the Geological Survey, belongs to the Forest Marble division of the Great Oolite series, and exhibits the structure known as “false-bedding or oblique lamination,” and occasionally the flagstones in this and other neighbouring quarries show ripple-marks and tracks of marine animals.
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References
page 268 note 1 See fig. 338, p. 330, Lyell, Elements of Geology, 1874.
page 268 note 2 Sir C. Lyell, in alluding to the Crinoidal plates at Bradford, overgrown with Serpulæ and Polyzoa, says, “Now these Serpulæ could only have begun to grow after the death of some of the stone-lilies, parts of whose skeletons had been strewed over the floor of the ocean before the irruption of argillaceous mud. In some instances we find that, after the parasitic Serpulæ were full grown, they had been incrusted over with a polyzoan, called Diastopora diluviana; and many generations of these molluscoids had succeeded each other in the pure water before they became fossil! (Elements of Geology, 1874, p. 330.)
page 268 note 3 Geology of Oxford and the Valley of the Thames, 1871.
page 269 note 1 Mag. Nat. Hist. 1839, p. 551.
page 269 note 2 , Hull, Geology of Country around Cheltenham, pp. 64, 65; Mem. Geol. Survey, 1857.Google Scholar
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page 269 note 4 Lycett, ibid. p. 99.
page 269 note 5 Deslongchamps, E., Notes pour servir à la Géologie du Calvados, Caen, 1863. Bull, de la Soc. Linn. de Normandie, vol. vii.Google Scholar
page 269 note 6 The workmen of Ranville give the name of chien to these hard and perforated surfaces, in allusion to the hardness of these bands. Dur comme du chien is a Normandy expression which indicates an extreme degree of compactness.
page 270 note 1 Deslongchamps, ibid. p. 19, pl. 2.
page 270 note 2 Hull, Memoirs, p. 37. Hull, ibid. p. 45.
page 270 note 3 Lycett, The Cotteswold Hills, p. 49.
page 270 note 4 Memoirs of the Geological Survey, 1846, vol. i. p. 289.Google Scholar
page 271 note 1 De la Beche, ibid. p. 291.
page 271 note 2 Hull, Memoir, ibid. p. 72.
page 271 note 3 De la Beche, Memoir, ibid. p. 285.
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