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actinolite action appears axinite bands basalt beds Boase bones carbonate chalybite chemical chemical affinities clay-slate cliffs colour copper Cornish Cornwall course crystalline crystals deposit depth Devonian district east elvan facts fathoms feet felspar felsparite felspathic fissures forces formation fossils garnet rock Geological Society gold gossan gradual transition grain granite greenstone Gurnard's Head hard Hayle hills horizontal hornblende hornblende rock inches iron pyrites joints junction laminated lava Lelant Lelant rock limestone lode magnesite Marazion mass massive metallic metalliferous metamorphic mica miles mining Mount Bischoff Mount's Bay museum Newlyn occur Old Ding Dong Porthalla produce purple killas quarry quartz quartz reefs right angles Sahiel sandstone schist schistose seen serpentine sharp separation side silicate slate Society of Cornwall spar species specimens stone strata structure substance surface theory thickness tion trace undulatory valleys vugh whole
Pagina 118 - By William Henry Flower, frs, Hunterian Professor of Comparative Anatomy, and Conservator of the Museum of the Royal College of Surgeons of England. The
Pagina 136 - OF THE FORCES THAT HAVE ACTED ON THE FORMATION AND ELEVATION OF THE LAND'S END GRANITE. By
Pagina 108 - I believe in all the localities I have named it was found in little veins crossing the lodes.
Pagina 53 - REMARKS ON (WITH A LIST) SOME OF THE ORGANIC REMAINS OF CORNWALL, IN THE MUSEUM OF THE ROYAL GEOLOGICAL SOCIETY OF CORNWALL.
Pagina 45 - intermingled with schistose bands of matted pale-green actinolite. This thick band is on the whole softer than what has been regarded as the country, and is
Pagina 45 - is specked throughout, but very irregularly, with pyrites, mispickel, and black and grey copper ores, whilst occasionally these metallic sulphides and oxides are accumulated in
Pagina 29 - of silver. Aldehyde and grape sugar have a similar power. With porous vessels, this condition can be most readily established, and most beautifully so by the action of charcoal. By putting a piece of freshly-burnt charcoal into a solution of nitrate of silver, we obtain in a little time very beautiful crystals of silver,
Pagina 102 - east of Marazion Station) the formation there was— Marsh surface, " Turfy," qy. " Peat" soil, Sand, mixed with small white shells in great numbers, but mostly much injured, " Turfy," qy. " Peat" soil, Tin stream. In the lower " turfy" or " peat" soil were found nuts and quantities of some hard wood.