TRANSACTIONS OF SECTION C. " 189 



Argillaceous Rocks. 



Thick shales are met with (o) throughout Ki, (h) in upper Cj and lower 

 Si, (c) in upper Di and upper D2 



Chanyes which liavc afjcctcd certain of the Rocks. 



Pe.ne contemporaneous brcrriation (dessication breccias) are characteristic of 

 all the shallow water (lagoon-phase, Dixon) rocks of C2 and S. 



Dolomifizafion proves to be considerably more widespread in the Avon 

 rocks tlian had been previously supposed. The matrix of the Petit. Granit 

 of Zi, Z2 and y is almost everywhere dolomitized. The almost complete dolo- 

 mitization of C, and the upper part of C2 has long been familiar. There has 

 been considerable dolomitization in the calcite-mudstones of Si and lower S2. 

 All the chief dolomites are to be classed as contemporaneous according to the 

 classification of ^Ir. L. M. Parsons. = 



3. Interim Report of lite Coininiltee to Investigate the Geologn of 



Coal Seams. 



i. Interim Report of the Committee on the Old Red Sandstone 

 Rocks of Kiltorca,n, Ireland. 



5. Interim Report of the Committee to Investigate the Flora of Lower 

 Carboniferous times, as exemplified at a newly-discovered locality 

 at Gullcine, Haddingtonshire. 



6. Litcriiii Report of the Committee to E.vcavate Critical Sections in 

 the Palceozoic Rocks of England and Wales. 



7. Interim Report of the Committee to- Excavate Critical Sections in 

 Old Red Sandstone Rocks at Rhynie, Aberdeenshire. — SeeEeports, 

 p. 110. 



8. Interim Report of the Committee to Consider the Preparation of a 

 List of Characteristic Fossils. 



9. Interim Report of the Committee on the Collection, Preservation., 

 and Systematic Registration of Photographs of Geological Interest. 

 —See Reports, p. 111. 



In the afternoon a Sectional Excursion to Bournemouth Cliffs took place. 



Geol. Mag. Dec. vi., vol. v. (1918), p. 246. 



