The Errata Slip reads: Hertfordshire ERRATA | Page | 33, line 12 from bottom, after Baldock, add and also near Tring. | | ” | 61, line 6 from top, for Great Western read North-Western. | | ” | 132, line 13 from top, for Stortford, read St Margaret’s. | | ” | 144, line 2, for The late Viscount Peel read The first Viscount Hampden. | | ” | 153, line 5 from top, dele has a castle and. | | ” | 154. | The market at Berkhampstead has been discontinued for many years. | | ” | 159. | The office of high bailiff of Hemel Hempstead is held by the mayor. | The changes to pages 154 and 159 have been made by adding footnotes.
The text from the diagram of Geological Systems giving the Names of Systems, and Characters of Rocks is reproduced here, the thickness of each division, measured from the diagram, is given as a percentage: TERTIARY - Recent & Pleistocene {1%} sands, superficial deposits
- Pliocene {1%} sands, superficial deposits
- Eocene {4%} clays and sands chiefly
SECONDARY - Cretaceous {6%} chalk at top
sandstones, mud and clays below - Jurassic {7%} shales, sandstones and oolitic limestones
- Triassic {5%} red sandstones and marls, gypsum and salt
PRIMARY - Permian {3%} red sandstones & magnesian limestone
- Carboniferous {16%} sandstones, shales and coals at top
sandstones in middle
limestone and shales below - Devonian {8%} red sandstones, shales, slates and limestones
- Silurian {9%} sandstones and shales, thin limestones
- Ordovician {11%} slates, shales, sandstones and thin limestones
- Cambrian {14%} slates and sandstones
- Pre-Cambrian {15%} sandstones, shales and volcanic rocks
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