Drilling/drill rig Joides Resolution Leg178 DRILL Drake Passage Color Color code HLS-system DEPTH DSDP/ODP/IODP sample designation L* a* b* lightness sediment/rock Color reflectance at 400 nm Color reflectance at 410 nm Color reflectance at 420 nm Color reflectance at 430 nm Color reflectance at 440 nm Color reflectance at 450 nm Color reflectance at 460 nm Color reflectance at 470 nm Color reflectance at 480 nm Color reflectance at 490 nm Color reflectance at 500 nm Color reflectance at 510 nm Color reflectance at 520 nm Color reflectance at 530 nm Color reflectance at 540 nm Color reflectance at 550 nm