Gondwana Massif have been dated at 320–330 million years old, indicating that the subduction process initiated in the early Carboniferous.This was relatively short lived (lasting about 20 million years), and initial contact of the two landmasses occurred in the mid-Carboniferous, with broader collision during the early Permian. In the Devonian an island arc named Chaitenia accreted to Patagonia in what is now south-central Chile. Gondwana and Laurasia formed the Pangaea supercontinent during the Carboniferous. Pangaea began to break up in the Mid-Jurassic when the Central Atlantic opened. In the western end of Pangaea, the collision between Gondwana and Laurasia closed the
PANGAEA (data library) Marine Environmental Sciences (MARUM), Bremen in Germany. The system is used by various international research projects from public funding as data repository and by the World Data Center for Marine Environmental Sciences (WDC-MARE) as long-term archive. The system was initially developed since 1987 and is operational on the Internet since 1995. The MediaWiki software is used to operate a wiki as PANGAEA manual and reference. PANGAEA is also listed in re3data.org. PANGAEA (data library) PANGAEA - Data Publisher for Earth & Environmental Science is a digital data library and a data publisher for earth system science. Data can be georeferenced