South Jason Island
island in the Falkland Islands
South Jason is an island north west of West Falkland in the Falkland Isles. It is part of the Jason Islands group, and is considered a group alongside other islands as "Islas las Llaves" in the Spanish language. The island has breeding colonies of seabirds, which were threatened by a fire started accidentally by the British military in 2001.
History
South Jason is one of the Jason Islands in the north west Falkland Islands. In Spanish it is considered one of "Islas las Llaves" (eastern, Seal Rocks and North Fur Island). Such a distinction doesn't exist in English between the two groups of the islands. South Jason is a narrow island some 7 kilometres (4.3 mi) long and 1.6 kilometres (1 mi) wide, covering an area of 375 hectares (930 acres), with its highest peak at 288 metres (945 ft) above sea level.
It is north west of Westpoint Island. In 1912, the lease on South Jason expired and the island became a Crown reserve.
Wildlife
Fur seals and sea lions are known to use the island; in 2014, a total of 13 sea lion pups were counted, and by 2021, the breeding sea lions had 34 pups.
This brief starts where responsible research should: with the source description of “South Jason Island” as island in the Falkland Islands. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as island in the Falkland Islands. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Jul 5, 2026. The linked authority identifier is Q7567567. Authority coordinates are -51.204, -60.883. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2001, 1912, 2014 and 2021.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “South Jason Island”, its source revision and the description used here.
- Expand the search: follow South Jason Island primary sources, South Jason Island archive and South research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “South Jason Island”?
- Which earlier names or jurisdictions may reveal additional records?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “South Jason Island” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.