Characteristics of volcanismKiipli, Tarmo; Kallaste, ToivoEstonian geological sections / Geological Survey of Estonia2002 / p. 17-21 : ill

Distribution of Ordovician chitinozoansNõlvak, Jaak; Bauert, GarmenEstonian geological sections / Geological Survey of Estonia2006 / p. 9-11

Distribution of Ordovician conodontsViira, Viive; Löfgren, Anita; Sjöstrand, LisaEstonian geological sections / Geological Survey of Estonia2006 / p. 11-13

Distribution of scolecodontsHints, OlleEstonian geological sections / Geological Survey of Estonia2001 / p. 12-14

General geological setting and stratigraphyPõldvere, Anne; Saadre, Tõnis; Lääts, JaanikaEstonian geological sections / Geological Survey of Estonia2006 / p. 6-8 : ill

Ordovician and lowermost Silurian carbon isotopesMartma, TõnuEstonian geological sections / Geological Survey of Estonia2006 / p. 14-15 : ill

Upper Ordovician volcanic ash bedsKiipli, Tarmo; Kallaste, Toivo; Kiipli, Enli; Orlova, KiiraEstonian geological sections / Geological Survey of Estonia2006 / p. 15-18 : ill

Volcanogenic interbedKiipli, Tarmo; Kallaste, ToivoEstonian geological sections / Geological Survey of Estonia2001 / p. 16-17