Wanderlust World Wanderlust World Natural, in-situ material (soil, weathered rock, glacial till) lying above a mineral deposit or bedrock. Thickness varies cm to 100+ m. Removed to access ore; often stockpiled for later reclamation.
Waste rock and low-grade material generated *during* mining/excavation. Includes blasted rock, tailings, and processing rejects. Piled in spoil heaps; may contain acid-generating sulfides or heavy metals requiring management.
Overburden is a pre-mining obstacle; spoil is a mining byproduct. Both affect land reclamation, water quality, and project economics.