Subject ASC0001mo9
The Quarterly journal of the Geological Society of London.
v.55 (1899), Page 661 (1899)
Smithsonian Libraries
BHL Page 35448163
Keywords
rock-face Penrhyn Cemaes stratification strata conglomerate Wylfa House Porthy Ogof Mynydd Wylfa Wales Matley C.A. Northern Anglesey stratification in crush conglomerate crush breccias Porth yr Ogof limestone pebbles quartzite