Kenorland located at lower latitudes Until tectonic magma plume rifting The Baltic Shield over the equator Joined to the Canadian forming an unity Its nexus near the Fennoscandian shield Transition point to two-layer core Findings of earlier continents indicate Contradicting adjustment theories During the Siderian and Rhyacian periods Protracted fissures manifested By mafic dikes and sedimentary basins Bimodal deep convection splitting common No longer a supercontinent, a divide At two-point-fortyfive Gya, a breakup Speculation based on the margin Spatial arrangements of Laurentia Drifting assemblies flow together Toward the subsequent amalgamation Southwest and northwest portions Of the Canadian Shield at opposite ends Temperatures plummeting abyssal Banded iron formations indicating anoxia Nevertheless, photosynthesis still unbound Stabilizing climates new levels