BGS mineralogy and petrology collection record

Sample number	E10685; COLLNO86;
Sample Donor	Blake,Professor
Rock name	'Original entry: Hornfels'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesy p 333 Quartz, Alkali Feldspar, Biotite Palaeozoic Hornfels Adinolitic Type
Locality details	Probably at Llyn-Bach [1"at Sw. of 'Caer-glaw'] Gwalchsnoci between Granites
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 380 764
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.