New Cretaceous Basin Discovered In The Rockies Lexam' s oil shows during gold exploration leads to the discovery of a cretaceous sub-basin within the tertiary san luis basin of southern colorado. It is positioned between the san juan, piceance, denver-julesburg, and raton basins and contains cretaceous source rocks at depths between 7000' and 17,000'.
AAPG Article - An Oil Find That Was As Good As Gold Three years ago Toronto-based Lexam Exploration was searching for gold in the San Luis Basin of Colorado. They found gold, all right, but it was the wrong color - black.
