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Table 4 Main temperature features of the confined aquifer systems

From: Groundwater age and hydrothermalism of confined aquifers in the Argentine Pampean plain

Aquifer level

Deep (m)

Upwelling temperature (°C)

Overheating with depth (°C)

Classification by temperature

A1 CAS

120–200

25.0–30.9

5.5–9.4

Hypothermal

A2a CAS

225–290

29.0–35.3

4.2–10.0

Hypothermal to mesothermal

A2b CAS

225–320

33.8–35.8

7.7–9.9

Hypothermal to mesothermal