Do a few sand grains reveal the 'lost' mid-Cretaceous deserts of North Africa?...by Andy Newell on July 29, 2015 #BGSGroundwater aeolian Algeria Andrew Newell aquifer Continental Intercalaire Cretaceous groundwater In Salah Kechba NASA North Africa Sahara desert +
NASA and the Soil Testing Kit by Wayne Shelley and Steve Richardson on May 01, 2013 apps hackathon met office NASA soil testing kit Steve Richardson Wayne Shelley +
