Geological context of the study area. a) Geological map of the southwest corner of Western Australia, highlighting the study area in the red square. b) DEM map of the study area (red square on a) showing tectonic elements and seismic line in c) West-east seismic section through the DMP Harvey-2 well site, which intersected a deep fault with ~1 km of normal displacement. The fault may show further displacement of the breakup unconformity; however, this is not resolvable on current seismic. The Lower Lesueur Sandstone is being investigated as a reservoir for CO₂ sequestration.