X-ray diffraction (XRD) measurements were conducted using Empyrean Powder Diffractometer with a Cukα radiation and a Ni filter at constant voltage 40 kV, and 30 mA.
The quantitative distribution of carotenoids in sediments of Pleistocene to Miocene age from the Peru upwelling area is reported. Major pigments include beta-carotene, diatoxanthin, caroteno-3,3'-diol
Color reflectance data were measured on section halves using an integration sphere and a UV-VIS spectrophotometer mounted on the Section Half Multisensor Logger (SHMSL). Spectral counts are recorded i