Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 219

The DOI matches its Crossref record.

Early Maritime Economy and El Niño Events at Quebrada Tacahuay, Peru

Keefer, David K., deFrance, Susan D., Moseley, Michael E., Richardson, James B., Satterlee, Dennis R., Day-Lewis, Amy·1998·Science

Abstract

The archaeological site of Quebrada Tacahuay, Peru, dates to 12,700 to 12,500 calibrated years before the present (10,770 to 10,530 carbon-14 years before the present). It contains some of the oldest evidence of maritime-based economic activity in the New World. Recovered materials include a hearth, lithic cutting tools and flakes, and abundant processed marine fauna, primarily seabirds and fish. Sediments below and above the occupation layer were probably generated by El Niño events, indicating that El Niño was active during the Pleistocene as well as during the early and middle Holocene.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1126/science.281.5384.1833

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 219

Metadata

Authors
Keefer, D. K., deFrance, S. D., Moseley, M. E., Richardson, J. B., Satterlee, D. R., & Day-Lewis, A.
Venue
Science
Published
1998-09-18
Volume
281
Issue
5384
Pages
1833-1835
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1975744277
Cited by
219
References
0
FWCI
146.18
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Early Maritime Economy and El Niño Events at Quebrada Tacahuay, Peru. https://app.cochat.ai/papers/10.1126/science.281.5384.1833
The paper
Keefer, D. K., deFrance, S. D., Moseley, M. E., Richardson, J. B., Satterlee, D. R., & Day-Lewis, A. (1998). Early Maritime Economy and El Niño Events at Quebrada Tacahuay, Peru. Science. https://doi.org/10.1126/science.281.5384.1833

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.