PROCESS-BLOCKS AND OTHER ILLUSTRATIVE FIGURES. XIX 



Page 



Fig. 1. Section on the northern coast of Bardsey 517 



2. Section from the south-eastern coast of Bardsey to the 



north-western corner 520 



3. Section along the south-western coast of Bardsey 520 



4. Sigraoidal fold on the ridge of Mynydd Enlli, at the 300- 



foot contour, looking north 522 



5. Overt'olding in quartzite-bands interbedded with slates ; 



cliff west of Pen Oristin 523 



6. ' Crush-conglomerate' in the cliff at Pen Cristin -524 



Geological sketch-map of part of the district between the 



Uganda Railway and Lake Magadi 536 



Figs. 1-4 [illustrating typical radial lines in Protogramrnoceras\ 551 



Fig. 1. General section across the Gipping (Orwell) Valley at 



Ipswich 58fc 



Figs. 2&3. Longitudinal sections down the Brett and Gipping 



Valleys (500 



Fig. 4. Sketch-map of Ipswich (302 



5. Cross-sections of various Suffolk river-valleys 014 



1. Hornblende-fels, G.S.M. 8140, Ravensthorpe *'.31> 



2. 'Archipelago' of quartz in quartz-dolerite-greenstone, 



Ivanhoe G.M 649 



3. Albitized porphyrite, Power-House Reserve 056 



CORRIGENDA. 



P. lxxxviii, in the List of Borings, seventh column, opposite ' Meux's Brewen 

 for ' Lower Greensand, 64 ' read ' Great Oolite Series, 64.' 



P. 200, last line of the footnote, for ' Whitby ' read ' Whitley.' 



