TheLong Range dikes are aNeoproterozoicmaficdike swarm ofNewfoundland and Labrador,Canada. It consists of alarge igneous province with an area of 105,000 km2 (41,000 sq mi) that was constructed about 620 million years ago whenLaurentia broke-up fromBaltica.[1] Its formation might have occurred when the ancientIapetus Ocean began to open.[2]
Long Range is the oldest of a series ofmagmatic events that occurred along the eastern margin of Laurentia 620–560 Ma, before the opening of the Iapetus Ocean. It can be linked to magmatism inBaltica, the basaltic dike swarm inEgersund, Norway, andBaltoscandian swarms. It was followed by the 590 MaGrenville-Adirondack swarm,Upstate New York, associated with separation fromAmazonia and the 563 MaSept Îles, Quebec, layered intrusions (coeval with theCatoctin large igneous province) associated with the break-up of theDashwoods microcontinent of West Newfoundland.[3]
 | ThisNewfoundland and Labrador location article is astub. You can help Wikipedia byexpanding it. |
 | This article about a specific Canadian geological feature is astub. You can help Wikipedia byexpanding it. |
