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== Geologists' Association Circular No. 143. Session 1911–1912. p.6-7 ==
 
== Geologists' Association Circular No. 143. Session 1911–1912. p.6-7 ==

Latest revision as of 18:04, 30 September 2020

P805497.jpg

Geologists' Association Circular No. 143. Session 1911–1912. p.6-7[edit]

Excursion to Greenhithe. Saturday, April 20th, 1912. (Transcription from GA Circular No. 143. Session 1911–1912. p.6-7)[edit]

DIRECTOR: S. PRIEST, F.G.S.

EXCURSION SECRETARY: G. J. ROBERTS, Noyna, Avenue Rise, Bushey.

Leave Cannon Street 1.46 train, due Greenhithe 2.41. Special return tickets, 2s. 4d. each.

Meet Excursion Secretary under clock, Cannon Street Station, not later than 1.30.

From London Road and Mount's Road, see good sections in Globe chalk pits, showing even junction of chalk and Thanet Sand, but beneath valley gravel, chalk surface is irregularly hollowed into pipes and pockets. Proceed to Dierden's Pit, Knockhall Road, small exposure of Pleistocene shell bed (Neritina fluviatilis with colour, Bithynia tentaculata, Valvata piscinalis-polymorphic, Corbicula fluminalis, Unio littoralis). Bed belongs to high terrace gravel.

Walk to Watling Street. Chalk pit shows peculiar intercalation, along planes of bedding, of layers of brown sandy clay, of Ostracola twenty-six species and varieties, and of Foramirifera forty-eight are recorded by F. Chapman, F.R.M.S.

Proceed through Darenth Woods to Tertiary Beds exposed in lane leading to "Fox and Hounds."

Return by M.A.B. Buildings, Woodlands, and Hedge Place, to I. C. Johnson's Ballast Pits, showing deep sections in valley gravel, Junction with chalk seen near here.

Near Stone Castle. Roman remains, sepulchral urns, etc., extensively found near surface above chalk.

Return to Greenhithe for tea at "The Avenue" Tea Rooms, High Street, Plain tea 9d. each. With eggs 1s.

Return train leaves Greenhithe 7.12. Arrives London Bridge 8.3, Charing Cross 8.17.

Total walking distance 5 miles.

REFERENCES.

Geological Survey Map in Sheet

1889. WHITTAKER, W.—"Geology of London." Mem. Geol. Survey, vol. i, p. 82, Fig. 5.

1894. CHAPMAN, F.—"Notes on some Microscopic Fossils from the Chalk at Swanscombe." Proc. Geol. Assoc., vol. nib, p. 369.

1900. DIBLEY, G. E.—"Zonal Features of Chalk Pits in Gravesend Area." Proc. Geol. Assoc., vol. xvi, p. 489.

1901. WHITTAKER, W.—"Guide to Geology of London."

1901. KENNARD, A. S., and WOODWARD, B. B.—"Non-marine Mollusca of the South of England. Proc. Geol. Assoc., vol. xvii, pp. 221, 238.

1901. STOPES, H.—"Discovery of Neritina fluviatilis," etc. Reprint Journ. Anthrop. Inst.

1908. CROSS, J.—"Excursion to Swanscombe and Galley Hill." Proc. Geol. Assoc., vol. xxi (1909), p. 29.

19I0. LEACH, A. L.—"North Kent and adjoining parts of Surrey." Geol. in the Field, Part II, p, 239,

Images[edit]

Excursion to Greenhithe, April 20th 1912[edit]

List of photographs[edit]

Excursion to Greenhithe, April 20th 1912[edit]

Page 85 P805496 New Globe Company's Pit. Section in Micraster cor anguinum Chalk. Excursion to Greenhithe, April 20th 1912.
Page 85 P805497 New Globe Company's Pit. Section of Drift and Thanet Sand resting on Chalk. Excursion to Greenhithe, April 20th 1912. Added note: Chalk; Thanet Sand; Drift. [Bottom to top.].
Page 85 P805498 New Globe Company's Pit. Drift and Thanet Sand on Chalk. Excursion to Greenhithe, April 20th 1912. Added note: Chalk; Bullhead Bed; Thanet Sand; Drift. [Bottom to top.].
Page 85 P805499 New Globe Company's Pit. Gravel with varying beds of Brickearth and loam resting on Thanet Sand. Excursion to Greenhithe, April 20th 1912. Added note: Thanet Sand; Drift. [Bottom to top.].
Page 87 P805500 New Globe Company's Pit. Pipe of Brickearth (re-sorted Thanet Sand) descending vertically through the Gravel owing to the removal of the underlying Chalk by solution. Excursion to Greenhithe, April 20th 1912.
Page 87 P805501 New Globe Company's Pit. Long shallow scoop of Gravel in Drift resting on an undulating surface of Thanet Sand. Excursion to Greenhithe, April 20th 1912.
Page 87 P805502 'Chalk Hole Lenacre', one mile SSE of Stone. Excursion to Greenhithe, April 20th 1912. The peculiar intercalation along the planes of bedding of some layers of brown sandy clay, in places 8 inches thick and in parts rather finely bedded. This had not been deposited with the Chalk but had filtered through vertical fissures and spread along the lines of bedding.
Page 87 P805503 'Chalk Hole Lenacre', one mile SSE of Stone. Excursion to Greenhithe, April 20th 1912. The peculiar intercalation along the planes of bedding of some layers of brown sandy clay, in places 8 inches thick and in parts rather finely bedded. This had not been deposited with the Chalk but had filtered through vertical fissures and spread along the lines of bedding.
Page 89 P805504 Dierden's Pit, Knockhall Road. Pleistocene shell bed in High Terrace Gravel. Excursion to Greenhithe, April 20th 1912.
Page 89 P805505 Pleistocene shell-bed, Greenhithe. [Numbered specimens.]. Excursion to Greenhithe, April 20th 1912. Added note: 1. Unio littoralis. 2. Corbieula fluminalis. 3. Sphaerium corneum. 4. Pisidium amnicum. 5. Pisidium fontanale. 6. Vivipara diluviana. 7. Naritina fluviatilis. 8. Bithynia tentaculata. 9. Valvata piscinalis. 10. Limnaeu perager.
Page 89 P805506 Pleistocene shell-bed, Greenhithe. Valvata piscinalis. [Specimens.]. Excursion to Greenhithe, April 20th 1912.
Page 89 P805507 Pleistocene shell-bed, Greenhithe. Neritina fluviatilis, still preserving original colour markings. [Specimens.]. Excursion to Greenhithe, April 20th 1912.
Page 89 P805508 Pleistocene shell-bed, Greenhithe. Bithynia tentaculata. [Specimens.]. Excursion to Greenhithe, April 20th 1912.