ON PHOTOGRAPHS OF GEOLOGICAL INTEREST. 



301 



6355 Foreshore, S. side St. Michael's 



Mount 



6356 Gwithian, cliffs opposite Godrevy 



Lighthouse 



6357 Gwithian, cliffs opposite Godrevy 



Lighthouse 



6358 Cliffs at Godrevy, near Gwithian . 



6359 North Cliffs, Camborne 



6360 Mullion Is., Lizard 



6361 Ballswidden, St. Just-in-Pendcen . 



6362 Tregargas Qu., St. Stephen's 



6363 St. Erth sandpit 



6364 Cam Brea, Redruth . 



6365 Cam Brea, Redruth . 



Greisen bands in granite. 1/4. 



Undercutting by the sea. 1922. P.C. 



Disturbed lower Palaeozoic slates and grits. 



1922. P.C. 

 Mylor slates folded and overthrust. P.C. 

 Pliocene platform above slate cliffs. 



1922. P.C. 



Veryan rocks with spilite and radiolarian 



chert. 1922. P.C. 

 Development of china-clay pit. 1/4. 

 Quarry in china stone. 1922. P.C. 

 Pliocene sands and clays. 1922. P.C. 

 Granite tor, showing aplite veins. 1/4. 

 Hollows in granite due to rain and wind. 



1923. pre. 



Derbyshire. — Photographed by the late T. W. Reader and ■presented by 



F. W. Reader. 1/4. 



6366 



6367 



6368 



6369 



6370 



6371 

 6372 



6373 



6374 



6375 



6376 



6377 



6378 

 6379 

 6380 

 6381 

 6382 

 6383 

 6384 

 6385 

 6386 



6387 

 6388 



6389 

 6390 



6391 



6392 



l)TideswellDale 



4) Knott Low, Miller's Dale 



5) Knott Low, Miller's Dale 



6) Knott Low, Miller's Dale 



7) Knott Low, Miller's Dale 



8) Calton Hill, near Miller's Dale 



9) Calton Hill, near MiUer's Dale 



10) Calton Hill, near Miller'sDale 



11) Shothouse spring between 

 Winster and Grange Mill 



12) N. of Grange MOl 



13) Via Gellia, Matlock Bath 



14) Via Gellia, Matlock Bath 



15) Via Gellia, Matlock Bath 



16) Via Gellia, Matlock Bath 



18) Ible Quarry, off Via GeUia . 



19) Ible Quarry, off Via GeUia . 

 22) Ible Quarr'y, off Via Gellia . 



24) Bonsall, near Matlock Bath . 



25) Bonsall, near Matlock Bath . 



26) Bonsall, near Matlock Bath . 



27) Bonsall Qu., near Matlock 

 Bath 



28) Pig of Lead Quarry, Via Gellia 

 31 ) Pig of Lead Quarry, Via Gellia 



) Pig of Lead Quarrv, Via Gellia 

 33) Pig of Lead Quarry, Via GeUia 



35) Pig of Lead Quarry, Via Gellia 



1) Cromford, Black Rocks . 



Spheroidal weathering of dolerite sill. 

 1914. 



LTpper lava, on bedded tuff on Carboni- 

 ferous Limestone. 1914. 



Upper lava, on bedded tuff on Carboni- 

 ferous Limestone. 1914. 



LTpper lava, on bedded tuff on Carboni- 

 ferous Limestone. 1914. 



Upper lava, on bedded tuff on Carboni- 

 ferous Limestone. 1914. 



Basalt quarry in vent. 1914. 



Imperfect columnar structure in basalt 

 of vent. 1914. 



Imperfect columnar structure in basalt 

 of vent. 1914. 



Spring issues at junction between lime- 

 stone and underlying tuff. 1914. 



Hills composed of agglomerate of vent. 

 1914. 



Spring thrown out at top of lower lava. 

 1914. 



Spruig thrown out at top of lower lava. 

 1914. 



Tufa on limestone. 1914. 



Tufa on limestone. 1914. 



Dolerite sill. 1914. 



Dolerite sill. 1914. 



Dolerite sill. 1914. 



Columnar dolerite siU. 1914. 



Columnar dolerite sill. 1914. 



Columnar dolerite sill. 1914. 



Sill of columnar dolerite. 1914. 



Lower lava. 1914. 



Spheroidal weathering of lower lava. 



1914. 

 Spheroidal weathering of dolerite. 1914. 

 Spheroidal weathering of lower lava. 



1914. 

 Spheroidal weathering of lower lava. 



1914. 

 Millstone Grit crag. 1914. 



