A marine reservoir correction of 400 years (ΔR = 0) was applied to all 14C dases59, as the benthic foraminiferal assemblages used for dating indicate an Atlantic water origin.
The phylogenetic relationships28,29,30,31,32, depth distribution of the related sharks2,3,4,18,27 and paleontological facts33,34,35,36 strongly suggest that the mackerel sharks have a shallow water origin, and that the goblin shark evolved from a shallow water lamniform ancestor and adapted to the deep-sea environments.
The value of rNa/rCl exceeds unity reflecting the meteoric water origin.
The hydrochemical coefficient rNa/rCl exceeds unity and more than that of seawater (0.87) reflecting the meteoric water origin.
(a) The groundwater of Dammam aquifer is characterized by a meteoric water origin, neutral to slightly alkaline pH of excessively mineralized and slightly brackish water.
Therefore, this contribution details the water quality and water origin in selected hand-dug wells of one the most prominent mining areas in Kenya Kakamega Countyy).
The observed narrow cluster of all δ-values in groundwater (between May and June rainfall) along the NMWL (Fig. 3) indicates meteoric water origin and recharge.
Skopljak and Vlahović (2012) wrote about the genesis of mineral waters in Kiseljak surroundings, and pointed out that the water origin from atmospheric and water descends in the primary aquifer where it becomes enriched with CO2 and minerals.
Considering chloride ions to be a conservative chemical specie, simple assumption on the sea water origin of the analyzed water samples can be assessed by viewing the concentration ratios of chloride to other ions (Table 5).
Hence, because of its wide distribution in coal and overburden rocks, especially of fluvial water origin, pyrite may be recognized as the major source of acidic drainage in the mine as well as this part of Bangladesh (Uddin 2003).
