GSSP for Telychian Stage
Definition:
The base of the Telychian Stage is defined in an abandoned quarry forming part of the Cefn-cerig Road section, Wales, UK, and is just above the highest record of the brachiopod Eocoelia intermedia and below the earliest record of the succeeding species Eocoelia intermedia .
Location:
The GSSP is located in an abandoned quarry forming part of the Cefn-cerig Road section, just below the top of the Wormwood Formation, Wales, UK.
The GSSP lies within the bioturbated sandstones and siltstones of the Wormwood Formation.
Primary Markers:
The base of the Telychian Stage is defined at a point just above the highest record of the brachiopod Eocoelia intermedia and below the earliest record of the succeeding species Eocoelia curtisi.
Secondary Markers:
Acritarchs:
The boundary horizon corresponds with the base of the Biozone 4 acritarch fauna of Hill (1974). It is characterized by the incoming of Deunffia monospinosa, Domasia bispinosa and Pterospermella cf. foveolata.
Correlation Events:
Just above Brachiopod LAD Eocoelia intermedia and below FAD of Eocoelia curtisi
Other Locations around the World:
See:
Holland, C. H. and Bassett, M. G., 1989 (eds.). A global standard for the Silurian System. National Museum of Wales, Geological Series 9, Cardiff.
References:
Holland, C. H., 1985. Series and Stages of the Silurian System. Episodes 8/2, p. 101-103.
Cocks, L. R. M., 1989. The Llandovery Series in the Llandovery Area. In: Holland, C. H. and Bassett, M. G. (eds.). A global standard for the Silurian System. National Museum of Wales, Geological Series 9, p. 36 - 50, Cardiff.