None of the marine shells from the study area is displaced towards the. This paper describes the complex patterns of diagenesis in Holocene beachrock ledges located along both the eastern and northern coasts of the state of Rio Grande do Norte, northeastern Brazil. Geochimica and Cosmochimica Acta ,
Note that contamination of aragonitic material is readily detected by. Cementation patterns and genetic implications of Holocene beachrocks from northeastern Brazil. The Bayesian calibration program OxCal v. Studies such as those by Keith et al. Carbon and oxygen isotopic composition of. But in northeastern Brazil, neotectonic controlled crustal movements or variation in marine and wind currents could provide the answer.