Marjorie S. Schulz
Davison V. Vivit
David A. Stonestrom
Alex E. Blum
Arthur F. White
2007
<div class="margin-size-16-y"><div class="margin-size-4-t margin-size-16-b"><p class="typography_f0ad1e serif_f0ad1e indefinite-width_f0ad1e"><span class="Highlight-module__1p2SO">A soil chronosequence developed on marine terraces along coastal California, exhibits deeper and more intensively weathered mineral profiles with increasing age (65 to 226 kyrs). Feldspar concentrations generally increase linearly with terrace depth. The slope or weathering gradient is defined by the ratio of the weathering rate and the velocity at which the profile penetrates into the regolith.A spread sheet calculator further refines profile geometries, demonstrating that the non-linear regions at low residual feldspar concentrations are dominated by exponential changes in mineral surface to volume and at high residual feldspar concentrations by the approach to thermodynamic saturation.These parameters, in addition to the kinetic rate constant, are of secondary importance to the fluid flux qh which controls the weathering velocity and solute fluxes from the profile. © 2007 Taylor & Francis Group, London.</span></p></div></div>
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Chemical weathering of a marine terrace chronosequence, Santa Cruz, California: Deciphering reaction rates from mineral depth profiles
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