Dear isogeochem list
               I know two empirical equations to calculate the past recharge
temperature from O-18 value of groundwater.the first after Dansgaard(1964)
for North Atlantic areas ,and  the second after Evans, et.al (1978)for
north-west Europe.if anyone knows another recent equations for this topic
specially for north africa , I appreciate mailing me.

Mohamed Khalil
institute of applied geosciences
Giessen, Germany
e.mail: [log in to unmask]
telephone: 0641-99-36122
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