- 1980
Upper boundary definition FAD of the
Graptolite Saetograptus (
Colonograptus)
varians Upper boundary GSSP
Pitch Coppice, Ludlow, U.K. 52°21′33″N...
- 1980
Upper boundary definition FAD of the
graptolite Saetograptus (
Colonograptus)
varians Upper boundary GSSP
Pitch Coppice, Ludlow, U.K. 52°21′33″N...
-
Formal Lower boundary definition FAD of the
Graptolite Saetograptus (
Colonograptus)
varians Lower boundary GSSP
Pitch Coppice, Ludlow, U.K. 52°21′33″N...
-
southwest of Ludlow. The base of the age is
marked by
Saetograptus (
Colonograptus) varians. The type
section is
located in a
quarry in the
Elton Formation...
- Shropshire, England, U.K. Biologic:
First appearance Saetograptus (
Colonograptus)
varians 52°21′33″N 2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2...
-
Campograptus Monograptidae Obut, 1949
Cochlograptus Monograptidae Obut, 1987
Colonograptus Monograptidae Přibyl, 1942
Coronograptus Monograptidae Obut & Sobolevskaya...
- Tsegelniuk, 1976 †Campograptus Obut, 1949 †Cochlograptus Obut, 1987 †
Colonograptus Přibyl, 1942 †Coronograptus Obut & Sobolevskaya, 1968 in Obut et al...
