Lines that represent contacts between geologic units(eg, depositional, intrusive and faulted contacts), compiled for use at or around 1:2.5M scale. This layer is limited to display only at scales between 1:1,500,000 and 1:20,000,000.

Fault and shear structures, represented as lines, compiled for use at or around 1:2.5M scale. This layer is limited to display only at scales between 1:1,500,000 and 1:20,000,000.