The Bajocian of the Mid-Cotteswolds

Summary and Conclusions The following are the facts and conclusions advanced in this paper:— 1. A record of the stratigraphical sequence of the ‘intervening beds’ between Stroud and Leckhampton 2. The correlation of the Gryphite- and Lower Trigonia-grits respectively. 3. A demonstration of how the stratigraphical sequence has been affected by the ‘Bajocian denudation’ 4. The discovery of the importance of the Cold Comfort section, and the position of its beds. 5. The discovery of a new ammonitiferous horizon in the Cotteswolds. 6. The bearing of this discovery on Jurassic chronology. 7. Correlation of the ‘intervening beds’ with Dorset strata, and the necessity of dividing the ‘Witchelliæ hemera’ into this and ‘Sonniniæ hemera.’ 8. The geographical extent of the ‘intervening beds’; and a demonstration that the strata of the Witchelliæ hemera only cover about 1½ square miles in the Mid-Cotteswolds. 9. Records of the chronological sequence of brachiopoda; with special reference to their value in stratigraphical correlation. 10. Description of certain new brachiopoda, particularly noticeable for their value as indicators of horizons. 11. Notes on the development of certain brachiopoda, to show the importance to nomenclature of exactness in recording horizons, and the importance to correlation of having a nomenclature in accordance with development, by avoiding a confusion of heterogenetic forms.