factograf
EN

Fifth stage of the Silurian

Homerian

Homerian
All data from the card 14
Name formality
Formal
Name ratified
1980
Celestial body
Earth
Regional usage
Global (ICS)
Time scale(s) used
ICS Time Scale
Chronological unit
Age
Stratigraphic unit
Stage
Time span formality
Formal
Lower boundary definition
FAD of the graptolite Cyrtograptus lundgreni
Lower boundary GSSP
Sheinton Brook, Homer, England52°36′56″N 2°33′53″W / 52.6156°N 2.5647°W
Lower GSSP ratified
1980
Upper boundary definition
FAD of the graptolite Saetograptus (Colonograptus) varians
Upper boundary GSSP
Pitch Coppice, Ludlow, U.K.52°21′33″N 2°46′38″W / 52.3592°N 2.7772°W
Upper GSSP ratified
1980

In the geologic timescale, the Homerian is an age of the Wenlock Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon that is comprehended between 430.6 ± 1.3 Ma and 426.7 ± 1.5 Ma (million years ago), approximately. The Homerian Age succeeds the Sheinwoodian Age and precedes the Gorstian Age.

The name comes from the small village of Homer, Shropshire near Much Wenlock. The defining lower boundary of Homerian rock layers (GSSP) is located within the Coalbrookdale Formation of England.

Read next

In 18 languages

Text from Wikipedia, CC BY-SA 4.0 · Source article