The BGS Lexicon of Named Rock Units — Result Details
Dungiven Formation
| Computer Code: | DUNN | Preferred Map Code: | DN |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ) | ||
| Lithological Description: | Intercalated metalimestone, basic metavolcanics, graphitic and micaceous schist, quartzites and psammites. | ||
| Definition of Lower Boundary: | Not exposed. | ||
| Definition of Upper Boundary: | Base of major amphibolitic green beds (Glenga Amphibolite Member) at base of Dart Formation. | ||
| Thickness: | Unknown | ||
| Geographical Limits: | Sperrin Mountains, Co. Londonderry, Northern Ireland. | ||
| Parent Unit: | Tayvallich Subgroup (DBTV) | ||
| Previous Name(s): | Dungiven Limestone [Obsolete Name and Code: Use DBDU, DUNN]
(-4589)
Dungiven Formation (A) [Obsolete Code: Use DUNN] (DBDI) Dungiven Formation (B) [Obsolete Code: Use DUNN] (DBDU) Dungiven Formation [Obsolete Name and Code: Use DUNN] (-221) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Principal reference section: East side of Butterhope Glen. Graphitic limestone, quartzite, green bed sequence. | ||
| Partial Type Section | [top of unit]: South end of Butteslope Glen: limestone unit succeeded by amphibolitic green bed (Glenga Amphibolite Member) at base of Dart Formation. | ||
| Partial Type Section | [bottom of unit]: base of limestone that crops out on Balin Hill and Mary Grey Mountain. Area not yet mapped in detail | ||
| Reference(s): | |||
| Arthurs, J W. 1976. The geology and metalliferous mineral potential of the Sperrin Mountains area. Geological Survey of Northern Ireland, Special Report No. 1, 119pp, 2app, 2 figs, 7 tables, 102 maps. | |||
| Hartley, J J, 1938. The Dalradian rocks of the Sperrin Mountains and adjacent areas in Northern Ireland. Proceedings of the Royal Irish Academy, Vol.XLIV, section B, 141-171. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| N26 | |||