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  • Early Cambrian Foraminifera...
    Culver, Stephen J.

    Science (American Association for the Advancement of Science), 11/1991, Letnik: 254, Številka: 5032
    Journal Article

    Agglutinated foraminifera have been recovered from siltstones in the Walidiala Valley, Taoudeni Basin, West Africa. Associated faunas suggest an Early Cambrian age for these strata. These now earliest known unequivocal foraminifera help constrain hypotheses concerning the origin of skeletalization at the beginning of the Phanerozoic.