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C.2: Woolwich and Reading series: Argile plastique and lignite. C.3: Thanet sands: Sables de Bracheux. That gypsum has been selected by almost all Continental geologists as affording the best line of demarkation between the Middle and Lower Tertiary, or, in other words, between the Lower Miocene and Eocene formations.
Laruentian: 0. The Sables de Bracheux, enumerated in the Tertiary division of the table, supposed by Mr. It is worthy of notice, that in the Hastings Sands there are certain layers of clay and sandstone in which numerous footprints of quadrupeds have been found by Mr. Beckles, and traced by him in the same set of rocks through Sussex and the Isle of Wight.
TERTIARY: Headon Series and beds between the Paris Gypsum and the Gres de Beauchamp: 14: 10 English, 4 French. Barton Clay and Sables de Beauchamp: 0. London Clay, including the Kyson Sand: 7 English. Plastic Clay and Lignite: 9: 7 French, 2 English. Sables de Bracheux: 1 French. Thanet Sands and Lower Landenian of Belgium: 0. SECONDARY: Maestricht Chalk: 0. White Chalk: 0. Chalk Marl: 0.
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