Check the listing for details. Thin-section Mount from DSDP Hole 483B Petrographic Microscope Slide 483B-31-2. Listed at 45.00 USD. Thin-section mount of core sample from the Deep Sea Drilling Project (DSDP) Leg 65, Hole 483B, Core 31-2, East Pacific Ridge in Gulf of California. For viewing under transmitted or polarized light.