▁se ism ic ▁waves ▁are ▁used ▁to ▁create ▁models ▁of ▁the ▁Earth ' s ▁sub sur face . ▁Ge ological ▁features , ▁called ▁tra ps , ▁that ▁commonly ▁indicate ▁the ▁presence ▁of ▁oil , ▁can ▁be ▁identified ▁from ▁the ▁model ▁and ▁used ▁to ▁determine ▁suitable ▁sites ▁to ▁dr ill . ▁ ▁Gr ound water ▁is ▁highly ▁vulner able ▁to ▁the ▁poll ution ▁produced ▁from ▁industry ▁and ▁waste ▁dispos al . ▁In ▁order ▁to ▁preserve ▁the ▁quality ▁of ▁fresh ▁water ▁sources , ▁maps ▁of ▁ground water ▁depth ▁are ▁created ▁and ▁compared ▁to ▁the ▁locations ▁of ▁poll ut ant ▁sources . ▁ ▁See ▁also ▁▁ ▁History ▁of ▁ge ology ▁ ▁History ▁of ▁geom agnet ism ▁ ▁Tim eline ▁of ▁the ▁development ▁of ▁t ect on oph ys ics ▁ ▁References ▁ ▁Further ▁reading ▁ ▁External ▁links ▁▁ ▁AG U ▁History ▁of ▁Ge oph ys ics ▁Committee ▁ ▁Category : Ge oph ys ics ▁Category : History ▁of ▁Earth ▁science <0x0A> </s> ▁The ▁Minister ▁of ▁Foreign ▁Affairs ▁is ▁the ▁head ▁of ▁the ▁Ministry ▁of ▁Foreign ▁Affairs ▁and ▁International ▁Co - operation ▁of ▁the ▁Government ▁of ▁T anz ania . ▁ ▁List ▁of ▁Minister s ▁The ▁following ▁have ▁served ▁the ▁min istry : ▁ ▁Part ies ▁ ▁References ▁ ▁* ▁T anz ania <0x0A> </s> ▁Capit án ▁S arm iento ▁is ▁a ▁town ▁in ▁Buenos ▁Aires ▁Province , ▁Argentina . ▁It ▁is ▁the ▁head ▁town ▁of ▁the ▁Capit án ▁S arm iento ▁Partido . ▁ ▁History ▁The ▁town ▁and ▁partido ▁were ▁established ▁by ▁provincial ▁law ▁on ▁