Jalón (river)
river of Spain main affluent of the Ebro by the right margin
The river Jalón (Latin: Salo) is located in the northeast of Spain, and is one of the principal tributaries of the Ebro. It has a length of 224 kilometres (139 mi) and drains a basin of 9,338 square kilometres (3,605 sq mi). The flow rate in Calatayud is 20.8 cubic metres per second (730 cu ft/s), but is highly irregular due to the great range of Mediterranean rainfall patterns.
The course of the river forms the main communication route between the Castilian Plateau and the Ebro. Until the late twentieth century, roads and railways between Madrid and Zaragoza followed this path.
Geography
The Jalón rises in one of the springs at the foot of the Sierra Ministra, a hill in Esteras de Medinaceli, Medinaceli (Soria), and then runs through Arcos de Jalón, to Monreal de Ariza, province of Zaragoza, Aragón.
The tributary river Nágima joins at Monreal de Ariza and the Henar at Cetina before the river enters a limestone gorge at Alhama de Aragón. The Jalón then meanders through the Paleozoic zones of the Cordillera Ibérica near Bubierca, being joined by the Piedra and the Manubles at Ateca. At Calatayud, the river expands into a broad valley and is joined by the Jiloca, Perejiles and Ribota. The next section meanders through the Sierra de Algairén and the Sierra de la Virgen.
This brief starts where responsible research should: with the source description of “Jalón (river)” as river of Spain main affluent of the Ebro by the right margin. 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 river of Spain main affluent of the Ebro by the right margin. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Sep 12, 2026. The linked authority identifier is Q20380. VIAF identifies the subject as 315140770. The Library of Congress control number is sh2001010718. Authority coordinates are 41.623, -1.286. 1 of 4 selected statements include explicit references; 2 carry qualifiers and 0 use preferred rank.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. 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 “Jalón (river)”, its source revision and the description used here.
- Expand the search: follow Jalón (river) primary sources, Jalón (river) archive and Jalón 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 “Jalón (river)”?
- Which authority defined the place, boundary or structure at the relevant date?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Jalón (river)” 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.