BGS mineralogy and petrology collection record

Sample number	E11042; COLLNO123;
Sample Donor	Matley, C.A
Rock name	'Original entry: Limestone'
Stratigraphy	Not entered
Comments	Mona Complex. Gwna Beds. See Mem.Geol.of Anglesey.p.310. Calcite, graphite, etc. Local silicification. S?t? thermal action on skerries grits. Lmst.near junct.with qtzite.
Locality details	Hells Mouth, west side
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 393 949
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.