Lower Ordovician
General info
Belongs to
Ordovician
Type chronostratigraphy
Rank Series
Scope global
Status formal standard
Age top (Ma) 470
Age base (Ma) 485.4
Index
O1
Alt. index
O1
Date added 2003-03-23
Date changed 2022-11-04
Stratotypes
LocalityTypeFrom (m)1To (m)2ReferenceRemarks
Green Point Section, western Newfoundland
boundary stratotype
101.8 Cooper et al., 2001 GSSP for the Tremadocian Stage
References (4)Sub units (2)Specimens (6439)Samples (3606)
NumberNameLocalityDepth (m)StratigraphyImage
TUG 1633-8 Pyrite Maardu Pakerort Stage
TUG 72-750 Rhabdinopora flabelliformis flabelliformis Valaste outcrop Pakerort Stage
TUG 72-749 Graptolithina Valaste outcrop Pakerort Stage
TUG 1209-191-2 Lingulella Perledal Tremadocian
TUG 1209-192 Broeggeria Perledal Tremadocian
TUG 1209-191-1 Broeggeria Perledal Tremadocian
TUG 1209-190 Broeggeria Perledal Tremadocian
TUG 1209-189 Broeggeria Perledal Tremadocian
TUG 1209-188 Lingulella Perledal Tremadocian
TUG 1209-187 Broeggeria Perledal Tremadocian
TUG 1209-186 Broeggeria Perledal Tremadocian
TUG 1209-185-2 Perledal Tremadocian
TUG 1209-185-1 Perledal Tremadocian
TUG 1209-184 Perledal Tremadocian
TUG 1209-183 Broeggeria Perledal Tremadocian
TUG 1209-182 sedimentary rocks Perledal Tremadocian
TUG 848-3 sedimentary rocks Brattefors, Västergötland Tremadocian
TUG 1679-4 sedimentary rocks Ülgase outcrop Pakerort Stage
TUG 1209-175 Saka outcrop Tremadocian
TUG 1209-174 Saka outcrop Tremadocian
TUG 1209-169 Thysanotos siluricus Holy Cross Mountains Tremadocian
TUG 1209-162 Broeggeria Palukne borehole 1855.3 Tremadocian
TUG 1209-161 Broeggeria Palukne borehole 1855.3 Tremadocian
TUG 72-735 Lingulella Kadriorg, Koidula Street Pakerort Stage
TUG 72-734 Lingulella Kadriorg, Koidula Street Pakerort Stage
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