Preface; pp. 93–94

Ordovician timescale in Estonia: recent developments; pp. 95–108

The Early Ordovician trilobite distribution and zonation of the East Baltic; pp. 109–127

Frequency patterns of chitinozoans, scolecodonts, and conodonts in the upper Llandovery and lower Wenlock of the Paatsalu core, western Estonia; pp. 128–155

Lower Ordovician Leetse Formation in the North Estonian Klint area; pp. 156–174

Siliciclastic grain size composition of the Upper Ordovician rocks of the Blidene Formation in western Latvia; pp. 175–184