Jaak Nõlvak

High-resolution stable isotope stratigraphy of Upper Ordovician sequences: Constraints on the timing of bioevents and environmental changes associated with mass extinction and glaciation

P. J. Brenchley, G. A. F. Carden, Linda Hints et al. · Geological Society of America Bulletin · 2002 · 387 citations

Engineering, Paleoceanography, Biostratigraphy +17

Middle and Upper Ordovician carbon isotope chemostratigraphy in Baltoscandia: A correlation standard and clues to environmental history

Leho Ainsaar, Dimitri Kaljo, Tõnu Martma et al. · Palaeogeography Palaeoclimatology Palaeoecology · 2010 · 212 citations

Sedimentary Record, Engineering, Paleoenvironmental Change +6

Ordovician chitinozoan zones from Baltoscandia

Jaak Nõlvak, Yngve Grahn · Review of Palaeobotany and Palynology · 1993 · 178 citations

Biology, Oomycete, Ordovician Chitinozoan Zones

Late Ordovician carbon isotope trend in Estonia, its significance in stratigraphy and environmental analysis

Dimitri Kaljo, Linda Hints, Tõnu Martma et al. · Palaeogeography Palaeoclimatology Palaeoecology · 2004 · 123 citations

Isotope Analysis, Biogeochemistry, Engineering +9

δ18O and REE contents of phosphatic brachiopods: a comparison between modern and lower Paleozoic populations

Christophe Lécuyer, Patricia Grandjean, Jean‐Alix Barrat et al. · Geochimica et Cosmochimica Acta · 1998 · 120 citations

Paleoenvironmental Reconstruction, Living Fossil, Ree Contents +5