Interstitial water studies on small core samples, leg 19

The sediments cored on Leg 19 consist primarily of diatomaceous oozes with variable proportions of volcanic material and terrigenous clays and silts. With a few exceptions, deposition rates are high at these sites, usually exceeding 5cm/10³y. The interstitial solutions sampled exhibit compositional changes which previously have been found to characterize rapidly deposited terrigenous sediments. Some of the largest changes in Na⁺, K⁺, Mg²⁺, Cl^-, and HCO³ yet found in DSDP samples occur in the pore waters studied from this leg (see Table 1).