temps (durée) (1) tectonique (1) spectacle (1) sédiment (1) roche (1) région (1) enrichissement (1) contamination (1) chimie (1) Paleopedology--Paleogene (1) Chemical warfare (1) Composition (1) Paleoclimatology--Paleogene (1) Magmas (1) Paleobotany--Paleogene (1) Paleontology--Paleogene (1) Geology, Stratigraphic--Paleogene (1) Origin (1) Volcanic ash, tuff, etc (1) Variations (1) Time (1) Rocks (1) Magmatism (1) Isotopes (1) Geochemistry (1) Chemistry (1) Character (1) Paleoentomology--Paleogene (1) Palynology--Paleogene (1) Convergent margins (1)