Map record details
Map series | Geological Survey of England and Wales 1:63,360/1:50,000 geological map series, New Series |
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Sheet number | 239 |
Sheet title | Hertford. |
Map type | Drift |
Scale | 1:50 000 |
Publication year | 1978 |
Author statement | Original geological survey on the Old Series one-inch maps, published in 1861-1898. Re-surveyed on the six-inch scale by R.L. Sherlock, R.W. Pocock and T. Robertson in 1911-14 and 1921. |
Published statement | Published (with Drift) in 1924. Reprinted 1948. Reconstituted for the one-inch scale with without geological revision and reprinted on the 1st Series1:50 000 base 1978. Print code: 2500/78. |
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