{
  "abstract": "This study investigates gravity-flow deposition in the supply-limited northern Ecuadorian margin to extend the paleoseismic record, using core and chirp dataset collected offshore the Esmeraldas and Pedernales segments. Event-bed architecture, benthic-foraminiferal and ichnological assemblages, and along-strike stratigraphy are integrated to reconstruct depositional processes and evaluate how margin morpho-structure and tectonic preconditioning control source-to-sink relationships, event-bed style, distribution, recurrence, and paleoseismic significance. Hemipelagic sediments are interbedded with single-pulsed (STu), multi-pulsed (MTu), amalgamated turbidites (ATu), volcaniclastic turbidites (VTu), and debrite-turbidite (DT) couplets. The internal architecture of MTu, ATu, and DT couplets reveals quasi-synchronous but temporally staggered flow pulses within a single composite event. In the northern zone, middle-bathyal-to-abyssal sources are routed through the Galera collision zone and Galera Fault, where landward-and steeply dipping structures favor larger, less frequent failures resulting in MTu-ATu and DT couplets. In the south, upper-to middle-bathyal sources are routed through gullies, where the seaward-dipping structures of the Atacames collision zone favor smaller, more frequent STu. Forty-five event beds deposited over ~5 kyr (AD 1897 to 3403 BC) include 8 margin-wide MTu-ATu and DT couplets with a mean recurrence interval of 577 (+240/-239) yr, consistent with an ~600-yr recurrence for Mw ≥ 8 earthquakes, and 29 basin-wide STu with multi-decadal recurrence intervals, consistent with Mw 7-7.5 earthquakes. Nine DT couplets in deeper chirp stratigraphy span ~17 kyr across the lowstand and highstand but absent during the intervening transgression. Sea level acted as a secondary modulator, while earthquakes remained the principal, though not exclusive, trigger. These findings demonstrate the paleoseismic value of supply-limited trenches when depositional processes and tectonic preconditioning are evaluated.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Mishelle Muthre"
    },
    {
      "name": "Jean-Noël Proust"
    },
    {
      "name": "Gueorgui Ratzov"
    },
    {
      "name": "Sébastien Migeon"
    },
    {
      "name": "Jean-Yves Collot"
    },
    {
      "name": "Miguel Gonzalez"
    },
    {
      "name": "Francois Michaud"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ekg85wg1d34p3.bib",
  "cited_by": 0,
  "doi": "10.1016/j.quascirev.2026.110244",
  "fulltext_url": null,
  "id": "ekg85wg1d34p3",
  "issns": [
    "0277-3791",
    "1873-457X"
  ],
  "landing_url": "https://insu.hal.science/insu-05733487v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.sdu.stu"
    ],
    [
      "openalex",
      "1904|Geological formations and processes"
    ]
  ],
  "openalex": "W7204713121",
  "pdf_url": "https://insu.hal.science/insu-05733487/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/ekg85wg1d34p3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "insu-05733487",
      "source": "hal",
      "url": "https://insu.hal.science/insu-05733487v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:1904|Geological formations and processes",
      "subfield": "geology-geochemistry"
    }
  ],
  "title": "Event beds in the northern Ecuadorian trench: characteristics, sources, recurrence, and paleoseismic significance",
  "title_text": "Event beds in the northern Ecuadorian trench: characteristics, sources, recurrence, and paleoseismic significance",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/ekg85wg1d34p3",
  "venue": "Quaternary Science Reviews",
  "versions": []
}