... m.However,due to the action of old river systems, in someplacesthereisnotrace of the finegrainsediments, but there remain only the coarsegrainedsediments of river bed facies, whichare of high storage and water bearing capacity. These ... Science and Technology in Top BottomTop Bottom VNUJournal of Science,EarthSciences23(2007)170‐176170 Characteristics of Quaternary sedimentary facies in relation to water bearing capacity of aquifers and aquicludes in the Red River Delta, Vietnam NguyenThanhLan*,TranNghi,DangMai,DinhXuanThanhCollege of Science,VNUReceived07March2007Abstract.There ... formed in transgression period, composed mainly of fine grained size leading to the water bearing capacity isverylow and playsaroleas aquicludes. Besides, in thesefinegrainsizelayers, the contents of arsenic and ironarehigh,especially in darkclay,siltyclayrich in organic...