Typical flow rates range from 0.05 to 0.5 ml/day for argillaceous rock samples of 8-12 cm length and hydraulic heads of 2-8 MPa, corresponding to head gradients of 1.7 x [10.sup.3] - 10 x [10.sup.3] m/m.
Gorgeon et al., "Modelling of the ion-exchange properties and indirect determination of the interstitial water composition of an argillaceous rock. Application to the Callovo-Oxfordian low-water-content formation," Applied Geochemistry, vol.
The main rock assemblage in this segment is dark-black argillaceous rock containing organic matter (silty claystone, oil shale) interbedded with sandy dolostone and dolomitic siltstone of approximately isopachous type.
[20,21] presented an experimental study on the delayed behavior of unsaturated argillaceous rocks with the dimensions of 24 x 36 mm, including shrinkage, swelling, and creep, by DIC techniques and measured the very low strain rate of the argillaceous rocks at various scales under uniaxial compression and various environmental conditions.