The distinctive 'wedge' shape of Jonah Field is determined
by the fault structure. Digitized from a published article by
DuBois, et al, the fault lines include the notorious Line of
Death.

A colored image overlay of the Lance Pool Structure.
Elevation of the Lance, in feet with respect to sea level.
**As an image overlay, this may tax older hardware.

Surface geology of Sublette County, Wyoming. This overlay
is an excerpt from a state map created by the Wyoming
State Geological Survey.
**As an image overlay, this may tax older hardware.