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• 20:23, 3 February 2022 Scotfot talk contribs uploaded File:GA Image 0444.jpg (Figure 10.—Deep borings of S.E. England. (Thicknesses from H. B. Woodward's Geology of England and Wales.) By permission of the Essex Field Club. Index to numbers, showing the relative ages of the various beds. 1. Alluvium;-made ground, etc. 2. Tertiary Beds. 3. Chalk. 4. Upper Greensand. 5. Gault. 6. Lower Greensand. 7. Purbeck Beds. 8. Portland Beds. 9. Kimeridge Clay. 10. Corallian Beds. 11 Oxford Clay. 12 Great Oolite. 13 Lower Carboniferous Beds. 14 Devonian and Old Red...)