d="p0010">The chemostratigraphic scheme comprises a hierarchical order of zones, subzones, divisions and subdivisions.
dd><dt class="label">•dt><dd>d="p0015">Zonation is largely based on based on variations in elemental ratios reflecting changes in source/provenance.
dd><dt class="label">•dt><dd>d="p0020">Some chemozones are missing in particular sections as a result of erosion/non deposition.
dd><dt class="label">•dt><dd>d="p0025">A fully integrated biostratigraphy/chemostratigraphy approach was utilized to produce the highest level of resolution.
dd>dl>