The exact time period of the excursion is debated among scholars, beginning around 573 Ma and ending around 562[1] or 551[2] Ma.
[4] It is the largest negative δ13C excursion in Earth history, and recovery took 50 million years,[5] although the apparent magnitude of the excursion may be distorted due to meteoric water diagenesis.
[7] The Shuram excursion may have played a role in sparking the rise of animals that resulted later in the Cambrian explosion.
[8] The oxygen-consuming Ediacara biota experienced a radiation during the isotopic excursion as a response to the transient surplus of oxidants.
[9] Microbial blooms of oxygenic phototrophs regulated the recovery of the carbon cycle from the isotopic excursion.