text: *Lomagundi-Jatuli event (2,300–2,080 Ma) Paleoproterozoic - Positive excursion
  *Shunga-Francevillian event (2,080 Ma) Paleoproterozoic - Negative excursion
  *Shuram-Wonoka excursion (570–551 Ma) Neoproterozoic - Negative excursion
  *Steptoean positive carbon isotope excursion (494.6-492 Ma) Paleozoic - Positive excursion
  *Ireviken event (433.4 Ma) Paleozoic - Positive excursion
  *Mulde event (427 Ma) Paleozoic - Positive excursion
  *Lau event (424 Ma) Paleozoic - Positive excursion
  *Cenomanian-Turonian boundary event (93.9 Ma) Mesozoic - Positive excursion
  *Paleocene–Eocene Thermal Maximum (55.5 Ma) Cenozoic - Negative excursion