The Central Iapetus magmatic province (CIMP) was a large igneous province (LIP) that occurred during the Ediacaran (615–550 Ma) between several ancient continents – Laurentia and Baltica and, possibly, Amazonia – during the break-up of the supercontinent Rodinia and resulted in the opening of the Iapetus Ocean.
With a potential radius of up to 4,500 km (2,800 mi), the CIMP was one of the larger volcanic events on Earth, similar in size to the 200 Ma Central Atlantic Magmatic Province.
[1] Evidences for the CIMP have also been found in Mexico, Morocco, and Svalbard.
[2] The CIMP coincides with the Marinoan and Gaskiers glaciations and precedes the so-called Cambrian explosion, the evolution of modern lineages.
[3] The CIMP left extensive traces along the Appalachians in eastern North America to which the Baltoscandian margin a conjugate.