The Lower Carboniferous sediments at Wadi Abu El Mogheirat consist of four stratigraphic formations, from base upwards: Um Bogma, Hashash, Magharet Maiah and Zarab formations. most-concentrated radioactive anomalies are in the middle member Bogma Formation. gibbsitic marl this formation shows highest uranium contents (around 710 ppm). Gibbsitic black gibbsite Formation show higher enrichment Co...

Strontium isotope chemistry, presented here, combined with previously obtained groundwater ion chemistry elucidates the stratigraphy of buried sedimentary rocks of the southern Yucatan Peninsula, Mexico. Whereas in groundwater of the northern Peninsula, ion chemistry is dominated by contact with a saline intrusion, the groundwater of southern Campeche and southern Quintana Roo has high SO4/Cl a...