Check the listing for details. Thin-section Mount from DSDP Hole 267 Petrographic Microscope Slide 28-267-7-1. Listed at 45.00 USD. Thin-section mount of core sample from the Deep Sea Drilling Project (DSDP) Leg 28, Hole 267, Core 7-1, South Indian Abyssal Plain. For viewing under transmitted or polarized light.