Sige, Bernard Age and stratigraphic reassessment of the fossil-bearing Laguna Umayo red mudstone unit, SE Peru, from regional stratigraphy, fossil record, and paleomagnetism - Amsterdam Elsevier November-December 2004 - pp. 771-794 ilus. Subjects--Topical Terms: BIOESTRATIGRAFIADINOSAURIOSESTRATIGRAFÍAFOSILESHUEVOS DE DINOSAURIOMAGNETOESTRATIGRAFIAPERUTHERIUM ALTIPLANENSETERCIARIO INFERIOR Subjects--Geographic Terms: PERUPUNOUMAYO, LAGUNA Subjects--Index Terms: FORMACION MUÑANI FORMACION VILQUECHICO