Figure 2From: Geochemical detection of carbon dioxide in dilute aquifersThe 3-D geologic model (10 × 10 km2 and 240 m deep) is based on the central High Plains aquifer sand and clay lithology [20, 21]. The main aquifer unit dips gently with a slope equal to 0.3% and is locally confined by low permeable clay layers at the top and base of the aquifer.Back to article page