Arenigian

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Arenigian

[‚a·rə′nij·ē·ən]
(geology)
A European stage including Lower Ordovician geologic time (above Tremadocian, below Llanvirnian). Also known as Skiddavian.
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References in periodicals archive ?
Bala Lake Railway is the home to Alice the little Welsh engine and runs narrow gauge steam trains with excellent views of the lake and nearby mountains of Arenig Fawr, Aran Benllyn and Aran Fawddwy.
The Tremadoc and Arenig sediments in the Bialowieza area.
Dymuna Margaret, Arenig, Llanrwst, Meira, Ann, Llinos, Glyn a Wyn a'u teuluoedd ddatgan eu diolch cywiraf am bob arwydd o gydymdeimlad a charedigrwydd a estynwyd iddynt yn ystod eu profedigaeth o golli Priod, Tad, Taid a Hen Daid annwyl ac arbennig iawn.
ARENIG Fawr is an excellent sevenmile day in the mountains.
Tonight it outdoes itself with a documentary about painters Augustus John and James Dickson Innes who, in 1911, left London for the wild Arenig Valley in North Wales.
Mountains (M) M1 Hebog mass M2 Snowdon mass M3 Glyder mass M4 Llywelyn mass M5 Arenig mass M6 Rhinog mass M7 Cadair Idris mass M8 Aran mass M9 Berwyn mass M10 Plynlimon M11 Radnor Forest M12 Mynydd Du M13 Fforest Fawr M14 Brecon Beacons M15 Black Mountains Hills (H) H1 Clwydian Range H2 Ll?
The rocks are mainly shales of Proterozoic age (Praha-Internacionalni) or Ordovician age, the latter belonging to the Arenig and Llanvirn series (Praha-MO) and Beroun series (Praha-Bohdalecka).
174), that "Two spectacular bursts in diversity took place [in the broad Ordovician context], one in the late Arenig and the other in the late Llanvirnian to early Caradocian.
287) recommended that the Hunneberg (Series) is better used in its original extent suggested by Tjernvik in 1956, as the unit filling, in Sweden, a hiatus which occurs between Tremadoc and Arenig rocks of the type area (Wales).