entity · proxy_lake_yoa_sediment_record
Lake Yoa varved sediment record
A high-resolution lake-sediment archive from Ounianga Kebir recording progressive late-Holocene drying in the central Sahara.
Review and provenance
Specialist reviewer: not recorded. Review date: not recorded.
Dataset workflow: proposed. This is separate from specialist review.
Confidence describes the stated assessment; it does not certify expert approval. How review works.
Chronology
Dating intervals may describe uncertainty or phases; their width alone does not establish event duration.
1600 BCE–800 BCE
Precision: approximate
- informs · provides environmental observation
Varved sediments of Lake Yoa (Ounianga Kebir, Chad) reveal progressive drying of the Sahara during the last 6100 years — Francus, Pierre, von Suchodoletz, Hans, Dietze, Michael, Donner, Reik V., Bouchard, Frédéric, Roy, André-J., Fagot, Maxime, Verschuren, Dirk, Kröpelin, Stefan (2013)Provides the progressive-drying proxy record.
Locator: Sedimentary facies, varve chronology, and late-Holocene aeolian-input discussion
Research description
The varved sequence provides an environmental observation rather than a historical event. It supports increasing aeolian input and progressive aridification, but it does not identify specific human migrations, political changes, or conditions across the whole of North Africa.
Evidence and sources
- informs · provides environmental observation
Varved sediments of Lake Yoa (Ounianga Kebir, Chad) reveal progressive drying of the Sahara during the last 6100 years — Francus, Pierre, von Suchodoletz, Hans, Dietze, Michael, Donner, Reik V., Bouchard, Frédéric, Roy, André-J., Fagot, Maxime, Verschuren, Dirk, Kröpelin, Stefan (2013)Provides the progressive-drying proxy record.
Locator: Sedimentary facies, varve chronology, and late-Holocene aeolian-input discussion