Stratigraphy provides a primary record of the tectonic evolution of ancient orogenic systems. Petrographic and geochemical analysis of Eocene to Oligocene sandstones of the Rhodope Massif and Thrace basin of the eastern Mediterranean by Caracciolo et al. reveal systematic changes in composition. This variability in sandstone composition is interpreted to be related to mixing between carbonate and silicate phases, and evolution from mafic to felsic source rocks. These results show how changes in supply rate and erosion reflect evolving geodynamic conditions in the orogenic belt surrounding the basins, and may provide insights into comparable orogens elsewhere.
Petrological, geochemical, and statistical analysis of Eocene–Oligocene sandstones of the western Thrace basin, Greece and Bulgaria by Luca Caracciolo, Hilmar von Eynatten, Raimon Tolosana-Delgado, Salvatore Critelli, Piero Manetti, and Peter Marchev