• International Commission on Stratigraphy (ICS)

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• Stratigrafic Charts

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• An Online Guide to Sequence Stratigraphy

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• GEOLEX - The National Geologic Map Database's Geologic Names Lexicon - USGS

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• Léxico Estratigráfico do Brasil (1984)

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• Deserts: Geology and Resources

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• Sistemas Desérticos

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• Ambientes Glaciais

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• Geleiras e idades Glaciais

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• All about Glaciers

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• Processos Geológicos e estruturas

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• Estratigrafia, Sedimentologia e Paleontologia

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• CHRONOS - Interactive Chronostratigraphy and Stratigraphic Databases

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