Oued Akrech section, Morocco (base of Zanclean, Pliocene)
E916553
Oued Akrech section in Morocco is a key marine sedimentary outcrop that serves as the Global Boundary Stratotype Section and Point (GSSP) marking the base of the Zanclean Stage of the Pliocene, thus defining the top of the Late Miocene.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Oued Akrech section, Morocco (base of Zanclean, Pliocene) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11288608 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Oued Akrech section, Morocco (base of Zanclean, Pliocene) Context triple: [Late Miocene, GSSPLocationForTop, Oued Akrech section, Morocco (base of Zanclean, Pliocene)]
-
A.
Moroccan Middle Atlas wetlands
The Moroccan Middle Atlas wetlands are a high-altitude complex of lakes, marshes, and peat bogs in central Morocco, noted for their biodiversity and importance as habitat for migratory and endemic species.
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B.
Moroccan Atlantic watershed
The Moroccan Atlantic watershed is a major hydrological basin in Morocco that drains numerous rivers, including the Bou Regreg, westward into the Atlantic Ocean.
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C.
Southwestern Morocco
Southwestern Morocco is a mountainous region of Morocco that includes part of the High Atlas range and encompasses North Africa’s highest peak, Toubkal.
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D.
Oued Righ region
The Oued Righ region is an oasis-dotted area of the northern Sahara in eastern Algeria, known for its date palm groves and historic desert settlements such as Touggourt.
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E.
Atlantic coastal plains of Morocco
The Atlantic coastal plains of Morocco are a fertile lowland region along the country’s western seaboard, characterized by extensive agriculture, major cities, and key economic activities centered on the Atlantic Ocean.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Oued Akrech section, Morocco (base of Zanclean, Pliocene) Target entity description: Oued Akrech section in Morocco is a key marine sedimentary outcrop that serves as the Global Boundary Stratotype Section and Point (GSSP) marking the base of the Zanclean Stage of the Pliocene, thus defining the top of the Late Miocene.
-
A.
Moroccan Middle Atlas wetlands
The Moroccan Middle Atlas wetlands are a high-altitude complex of lakes, marshes, and peat bogs in central Morocco, noted for their biodiversity and importance as habitat for migratory and endemic species.
-
B.
Moroccan Atlantic watershed
The Moroccan Atlantic watershed is a major hydrological basin in Morocco that drains numerous rivers, including the Bou Regreg, westward into the Atlantic Ocean.
-
C.
Southwestern Morocco
Southwestern Morocco is a mountainous region of Morocco that includes part of the High Atlas range and encompasses North Africa’s highest peak, Toubkal.
-
D.
Oued Righ region
The Oued Righ region is an oasis-dotted area of the northern Sahara in eastern Algeria, known for its date palm groves and historic desert settlements such as Touggourt.
-
E.
Atlantic coastal plains of Morocco
The Atlantic coastal plains of Morocco are a fertile lowland region along the country’s western seaboard, characterized by extensive agriculture, major cities, and key economic activities centered on the Atlantic Ocean.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
Global Boundary Stratotype Section and Point
ⓘ
geological section ⓘ |
| ageApproximation | about 5.33 million years ago ⓘ |
| approvedBy | International Union of Geological Sciences ⓘ |
| chronostratigraphicUnitDefined |
Zanclean Stage
ⓘ
lower Pliocene ⓘ |
| contains |
biostratigraphic markers
ⓘ
calcareous nannofossils ⓘ magnetostratigraphic record ⓘ planktonic foraminifera ⓘ |
| country | Morocco ⓘ |
| definesBoundary |
base of the Pliocene Series
ⓘ
base of the Zanclean Stage ⓘ top of the Late Miocene ⓘ top of the Messinian Stage ⓘ |
| environment | shallow‑marine depositional setting ⓘ |
| geologicTimeBoundary | Miocene–Pliocene boundary ⓘ |
| governingBodyForGSSP | International Commission on Stratigraphy ⓘ |
| lithology | marine sedimentary rocks ⓘ |
| locatedIn |
Atlantic coastal basin of Morocco
ⓘ
northwestern Morocco ⓘ
linked to:
northern Morocco
|
| locatedNear | Rabat ⓘ |
| partOf | Neogene stratigraphic framework of the Mediterranean–Atlantic realm ⓘ |
| region | North Africa ⓘ |
| series | Pliocene ⓘ |
| significance |
key section for post‑Messinian marine flooding in the Mediterranean–Atlantic gateway region
ⓘ
reference point for the base of the Pliocene worldwide ⓘ |
| stage | Zanclean ⓘ |
| stratigraphicRole | GSSP for the base of the Zanclean Stage ⓘ |
| usedFor |
calibration of the Neogene time scale
ⓘ
global chronostratigraphic correlation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Oued Akrech section, Morocco (base of Zanclean, Pliocene) Description of subject: Oued Akrech section in Morocco is a key marine sedimentary outcrop that serves as the Global Boundary Stratotype Section and Point (GSSP) marking the base of the Zanclean Stage of the Pliocene, thus defining the top of the Late Miocene.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.