event · evt_lake_yoa_progressive_drying
Progressive late-Holocene drying recorded at Lake Yoa
Varved sediments record progressive drying and increasing aeolian input through the project interval.
What is the evidence?
observation
Varved sediments record progressive drying and increasing aeolian input through the project interval.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: range
highThis assertion records the event’s preferred range without suppressing narrower samples, phase uncertainty, or competing chronology noted elsewhere in the record.
- informs · dates
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 environmental sequence.
Locator: Varve chronology, sedimentary facies, and aeolian-input results
Interpretation and caveats
This is a regional environmental observation. Any effects on settlement, mobility, or exchange must be tested against local archaeology and should not be generalized across North Africa.
Event context
Classification
Event type: environmental change
Evidence layer: environmental
Timeline role: regional core
People and places
Locations: Lake Yoa varved sediment record
Why it matters to the timeline
This event directly documents the North African research scope in Fezzan and central Sahara, eastern Sahara and oasis corridors. It is included for its regional evidence rather than merely because it is contemporary.
Research notes
- Provides the environmental sequence. Role: provides environmental observation. Locator: Varve chronology, sedimentary facies, and aeolian-input results.
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 environmental sequence.
Locator: Varve chronology, sedimentary facies, and aeolian-input results
Referenced records
- Lake Yoa varved sediment record · entity