Figure F26. Covariance between resistivity, GRA (solid line) and MAD bulk density (open circles), magnetic susceptibility, NGR emission, and reflectance in the upper 70 mcd of Site 1090. All properties show cyclicity with a period of ~5 m in the uppermost 30 mcd, and a smaller period of ~2 m below. H = hiatus, B/M = Brunhes/Matuyama boundary.