Lechuguilla Cave

EDS spectrum of red clay-like corrosion residue (sample RL4) from Red Lake passage in the Western Branch. Possibly a smectite or illite clay. Samples are Au-Pd coated. Analysis by Spilde, Northup, and Boston.

EDS spectrum of red clay-like corrosion residue (sample RL4) from Red Lake passage in the Western Branch. Analysis is of a bright areas on back-scattered detection and shows more iron than the preceding sample area. Samples are Au-Pd coated. Analysis by Spilde, Northup, and Boston.