/ 



I 



xvi peocess-blocks and othee illitsteative fi6itees. 



Fig. Page 



f Map showing the probable western and southern limits of the 



1. -I German Ocean during the Miocene, and at the conunence- 



[ ment and towards the end of the Diestien period 316 



2. Eod-like bodies in Coralline Crag residues 323 



q r Section showing the irregular surface of the London Clay 

 ■\ under the Coralline Crag at Eamsholt and Sutton 324 



4. Map of the main mass of the Coralline Crag 326 



f, r Section showing the structure of the Coralline Crag and its 



■ \ progressive dip N.N.E. of its junction wiLh the London Clay. 328 



n r Diagram showing the comparative positions of the supposed 

 * \ zones in the Coralline Crag, according to Prestwich 329 



r- r Sections and borings in the Coralline Crag between Boyton 

 '"l andlken 332 



8. Section of the Gomer pit 335 



9, 10. Sections of the Bullock-yard Pit, Iken 340, 341 



1 f Hornblendic streaks in felspathic diorite, fringed with bristling 



■ [ actinolite-crystals, or passing into a tangle of the latter 361 



2. Bunches of actinolite on a block 362 



3. Tuft of hornblende-crystals 362 



. r Dia£:rammatic sketch of a face of garnet-actinolite rock [St. 

 ^■{ Gothard] 363 



K r Microscope-section of biotite including a small flake of the 

 I green variety, with iron oxide, etc 365 



n r Microscope-section showing one end of a lancet-shaped crystal 

 I of actinolite, tipped and fringed with flakes of biotite 367 



1-3. Microscope-sections of schist from Pant-y-Glo 378-380 



1. Plan of lodes at the Great Orme's Head 384 



2. Geological Map of the Great Orme's Head 386 



3. Section in quarry at the Little Orme's Head 395 



1. Petalocrinus mirabilis , 401 



2. , microscope-section of matrix 404 



3. , diagram of tegmen 409 



. r visbycends, diagram showing branching of grooves in 



■ I arm-fan 412 



5. , diagram of arm-facet 416 



o rr r vishycen&is, series of sections across proximal end and 



' '\ horizontal section of arm-fan 418 



8. , tracings of arm-fans, partly restored 423 



9. (senior), tracing of arm-fan 424 



