Natural Resources Wales. Data downloaded from DataMapWales and used under the Open Government Licence for Public Sector Information (OGL). This information is provided to highlight sites of geological interest in Wales. For issues relating to sites that have RIGS status please consult the relevant authorities for up to date information regarding designation status, planning and other administrative issues.

Tyllau Mwn

Category: Scientific

Subcategory: Mineralogy

Network: Cambrian-Ordovician bedded Fe/Mn mineralization/'Alpine'-type veinmineralizatio

Subnetwork: Primary mineralogy

Local Authority area: Gwynedd

National Park area: Snowdonia

Area of site in hectares: 14.84090932

Grid reference: [SH 84474 20627]

GR easting: 284474.6496

GR northing: 320627.9874

Site geometry: Site boundary