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Statements

Subject Item
dbr:Clwyd_Limestone_Group
rdfs:label
Clwyd Limestone Group
rdfs:comment
The Clwyd Limestone Group is a stratigraphic unit (a defined sequence of rock layers) of to Brigantian age (Lower Carboniferous) found in north Wales. It forms part of the Carboniferous Limestone Supergroup. Its most extensive outcrop is along the length of the Clwydian Range, immediately to the east of its crest, between Llandegla and Prestatyn. A further though more fragmented outcrop extends in an arc along the western margins of the Vale of Clwyd north from Rhyd-y-meudwy, west of Ruthin and then northwest to meet the coast at Llanddulas. It is prominently exposed at the Great Orme and Little Orme near Llandudno and again in three areas of eastern and southern Anglesey, together with a small area to the south of the Menai Strait between Bangor and Y Felinheli. The outcrop also extends
dbp:name
Clwyd Limestone Group
dcterms:subject
dbc:Carboniferous_System_of_Europe dbc:Carboniferous_Wales dbc:Limestone_formations_of_the_United_Kingdom dbc:Geology_of_Wales
dbo:wikiPageID
65788238
dbo:wikiPageRevisionID
1115692800
dbo:wikiPageWikiLink
dbr:Y_Felinheli dbr:Little_Orme dbr:Llandegla dbr:Llandudno dbc:Carboniferous_System_of_Europe dbr:Menai_Strait dbr:Limestone dbr:Great_Orme dbr:Visean dbr:Llangollen dbr:Sandstone dbr:Ruthin dbr:Llanddulas dbr:Oswestry dbr:Dolomite_(rock) dbr:Clwydian_Range dbr:Mississippian_(geology) dbr:Pentre_Chert_Formation dbr:Clwyd dbr:Shropshire dbr:Cefn-y-fedw_Sandstone_Formation dbr:Wales dbc:Carboniferous_Wales dbr:Group_(stratigraphy) dbr:Inliers_and_outliers_(geology) dbr:Eglwyseg dbr:Corwen dbr:Anglesey dbr:Chadian_(stage) dbr:Bangor,_Gwynedd dbr:List_of_types_of_limestone dbc:Geology_of_Wales dbr:North_Wales dbr:Ffrith dbr:Carboniferous_Limestone dbr:Prestatyn dbr:Stratigraphic_unit dbr:Wrexham dbc:Limestone_formations_of_the_United_Kingdom dbr:Powys dbr:Llanymynech dbr:Vale_of_Clwyd dbr:Mudstone
owl:sameAs
wikidata:Q102045862 n14:Fd6sK
dbp:subunits
Cefn Mawr Limestone, Loggerheads Limestone, Red Wharf Limestone, Llanarmon Limestone, Leete Limestone, Foel and Minera formations
dbp:underlies
Pentre Chert Formation or Cefn-y-fedw Sandstone Formation
dbp:unitof
dbr:Carboniferous_Limestone
dbp:wikiPageUsesTemplate
dbt:Reflist dbt:Infobox_rockunit dbt:Short_description
dbp:age
dbr:Mississippian_(geology)
dbp:period
Carboniferous
dbp:region
dbr:North_Wales
dbp:thickness
54000.0
dbp:type
dbr:Group_(stratigraphy)
dbo:abstract
The Clwyd Limestone Group is a stratigraphic unit (a defined sequence of rock layers) of to Brigantian age (Lower Carboniferous) found in north Wales. It forms part of the Carboniferous Limestone Supergroup. Its most extensive outcrop is along the length of the Clwydian Range, immediately to the east of its crest, between Llandegla and Prestatyn. A further though more fragmented outcrop extends in an arc along the western margins of the Vale of Clwyd north from Rhyd-y-meudwy, west of Ruthin and then northwest to meet the coast at Llanddulas. It is prominently exposed at the Great Orme and Little Orme near Llandudno and again in three areas of eastern and southern Anglesey, together with a small area to the south of the Menai Strait between Bangor and Y Felinheli. The outcrop also extends southwards from Llandegla to form an impressive scarp at Creigiau Eglwyseg north of Llangollen and south again, to the west of Oswestry to Llanymynech Hill on the Powys/Shropshire border. In Anglesey, it comprises the Loggerheads Limestone Formation and overlying Cefn Mawr Limestone Formation. These are supplemented at the Great Orme by an underlying Llanarmon Limestone Formation and an overlying Red Wharf Limestone Formation, both of which are dolomitic, at least in part. In the Clwydian Range, a lowermost Foel Formation is succeeded in turn by the Llanarmon Limestone, Leete Limestone, Loggerheads Limestone and Cefn Mawr Limestone formations. These are capped by the limestones and sandstones of the Minera Formation which completes the sequence. The outcrop in the west of the Vale of Clwyd is similar but narrower and lacking the Foel Formation. The outcrop south of Llandegla comprises only the Leete, Cefn Mawr and Minera units. There is a small faulted inlier of the Clwyd Limestone around Ffrith to the northwest of Wrexham and a smaller outlier of the Clwyd Limestone just to the west of Corwen.
dbp:extent
Clwyd and west to Anglesey
dbp:namedfor
dbr:Clwyd
dbp:otherlithology
dbr:Sandstone dbr:Mudstone
dbp:overlies
'Basement Beds' , Lower Palaeozoic rocks
dbp:prilithology
dbr:Limestone
prov:wasDerivedFrom
wikipedia-en:Clwyd_Limestone_Group?oldid=1115692800&ns=0
dbo:wikiPageLength
3924
foaf:isPrimaryTopicOf
wikipedia-en:Clwyd_Limestone_Group