Check the listing for details. Thin-section Mount from DSDP Hole 285A Petrographic Microscope Slide 30-285A-9-2. Listed at 45.00 USD. Thin-section mount of core sample from the Deep Sea Drilling Project (DSDP) Leg 30, Hole 285A, Core 9-2, South Fiji Basin. For viewing under transmitted or polarized light.