Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/185

 but it is said that chalk makes its appearance at Temple Patrick, near the north-east angle of the lake, being there exposed by the excavation of the deep valley through which the Six mile water flows.

This formation in Ulster comprises the following members.
 * 1. Tabular basalt,
 * 2. Columnar basalt,
 * 3. Greenstone,
 * 4. Greystone,
 * 5. Clinkstone porphyry,
 * 6. Bole or red ochre,
 * 7. Wacke,
 * 8. Amygdaloidal wacke,
 * 9. Wood coal.

The section given by Dr. Richardson of the cliffs near the Causeway well illustrates the arrangement of these substances in constituting the aggregate mass of flœtz trap.