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Figure F12. Superimposed X-ray powder diffraction patterns from 4° to 24°2θ, Site U1385. The scans show some minor variations in the baseline level from sample to sample, perhaps caused by variations in the packing of the sample holders, and a constant value was added or subtracted from each scan to make the scans line up better. Superimposing the scans in this fashion shows variation in X-ray intensity in the region from ~4° to 8°2θ, which may be caused by the presence of poorly crystalline clay material.

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