1. The Aravalli range is one of the oldest fold mountain systems in the world, located in Northwestern India.
2. Its geological history is complex, stretching deep into the Precambrian era.
3. Major mountain-building (orogenic) events associated with the Aravallis occurred during the Proterozoic Eon (roughly 2500 to 541 million years ago). Some significant phases are dated much older (e.g., Archean components) while others like the Delhi Orogeny are dated around 1700-900 million years ago.
4. The options provided are in hundreds of million years. 570 million years ago marks roughly the end of the Precambrian (Ediacaran Period) and the beginning of the Paleozoic Era. While the primary formation is much older, this figure might represent later geological activity or an older estimate within the broad range considered for the Aravalli system's prolonged evolution. It is the closest among the relatively 'younger' Paleozoic-era options provided, acknowledging the vast age of the Aravallis stretching much further back.