Fig. 10 in Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations

Fig. 10. Hypothetical scenario in the Estancia El Álamo locality (Santa Cruz Province, Argentina, Berriasian–Valanginian) following volcanic disturbances. A. Pre­eruption stage. Seedlings, juvenile, and mature trees of Agathoxylon mendezii sp. nov. growing in a warm almost subtropical palaeoenvironment. Note volcanoes in the distance. Photo shows wood with slightly growth ring. B. Initial eruption stage. Volcanoes begin to eject silicate dust and sulfur compounds into the stratosphere. C. Climax eruption stage. Aerosol layer thickness is markedly increased producing the decrease of the surface air temperature below subzero values. Photo shows wood damaged by frost. D. Post­eruption stage. Volcanoes activity begins to cease and temperature begins to rise to original values.