Excursion to Codicote, Herts. Saturday, May 10th, 1919 - Geologists' Association excursion

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Geologists' Association Circular No. 217. Session 1919-1920. p.3[edit]

Excursion to Codicote, Herts. Saturday, May 10th p. 1919 (Transcribed from: GA Circular No. 217. Session 1919-1920. p.3)[edit]

Director, B. L. SHERLOCK, D. Sc., F.G.S.

Excursion Secretary, A. H. WILLIAMS Woodbine, Torrington Park, N. Finchley.

Train leaves King's Cross (Main Line), 1.45 ; arrive Knebworth 2.34. Single fare, 3/1½. Return from Welwyn, 7.39; arrive King's Cross, 8.17. Fare. 2/9. Chief points of interest are—evidence of a former pre-glacial course of the River Alimram, and sections of Drift and Chalk. This will be the fourth of the series to study the Plateau Gravels to the north of London.

ROUTE.—Westwards from Knebworth Station to Knebworth Park, and thence to Deep End, over a Drift plateau. Then over chalk, to the Hitchin Road ; cross this and proceed to High Heath, where there are large gravel and sand pits showing considerable variety of deposition. The age and origin of these gravels will be discussed. Next to Codicote, which stands on Boulder Clay, filling the site of the old valley of the Mimram. Here tea will be taken. Afterwards the route is southwards to the present channel of the Mimram, across it, at Pulinore Water, and up the opposite slope to Ryefield Farm, which is on chalk. Thence by held-path to Liners Farm and Welwpi. Here the Drift ridge representing the old valley is again reached. Finally , from Welwyn to Welwyn Station, over gravel. Total distance, 7 miles.

REFERENCES.

O. S. Geol. Surv. Map, sheet 46, S.E.

1914. Summary of Progress of the Geological Survey for 1913, pp. 31–36.

Images[edit]

Excursion to Codicote, May 10th 1919[edit]

List of photographs[edit]

Excursion to Codicote, May 10th 1919[edit]

Page 127 P805811 Upper spit. Excursion to Codicote, May 10th 1919.
Page 127 P805812 Coarse gravel with large angular flints. Excursion to Codicote, May 10th 1919. Added note: Upper spit.
Page 127 P805813 Upper spit. Excursion to Codicote, May 10th 1919.
Page 127 P805814 Fine sand and gravel with lenticular and current bedding. Excursion to Codicote, May 10th 1919. Added note: Lower spit.
Page 129 P805815 Pipes in Chalk filled with Pliocene ? [sic] gravels. A band of tabular flint runs completely round the quarry. Excursion to Codicote, May 10th 1919.
Page 129 P805816 Pipes in Chalk filled with Pliocene ? [sic] gravels. A band of tabular flint runs completely round the quarry. Excursion to Codicote, May 10th 1919.