Figure F3. Hole 1272A lithology and stratigraphy and modal orthopyroxene in peridotites. The bars in the modal orthopyroxene column depict the range in orthopyroxene contents in that interval, with broken bars and percentages indicating discontinuous variations in modal proportions. In Unit II, fine-grained mafic rocks (represented as "diabase and microgabbros" in the figure) were recovered only at the top of drilled sections and are interpreted as rubble introduced during drilling. Also noted are the total recoveries of peridotite in each section. TD = total depth.