캐나다
CBM Potential of the Alberta Plains - Lethbridge Coal Zone Boundary (GIS dataset)
Coal zone boundary for the Lethbridge Coal Zone is based on subcrops generated by Alberta Geological Survey Special Report 007 (Regional Evaluation of the Coalbed Methane Potential in the Plains and Foothills of Alberta, Stratigraphy and Rank Study). We used additional coal picks from various sources to refine the boundary.