Chronology of Holocene vertebrate extinction in the Galápagos Islands

David W. Steadman, Thomas W. Stafford, Douglas J. Donahue, A. J.T. Jull

Research output: Contribution to journalArticlepeer-review

60 Scopus citations


Eleven conventional and 15 AMS (accelerator mass spectrometer) radiocarbon dates establish chronologies for nine Holocene vertebrate fossil sites in the Galápagos Islands, Ecuador. A Holocene fossil record approaching 500,000 bones, more than 90% of which predate the arrival of people, shows that most or all cases of extinction or extirpation in the Galápagos occurred after first human contact in AD 1535. This is especially significant for two species of large rodents (Megaoryzomys spp.) that are known only from bones found in lava tubes. The highest rate of background (prehuman) extinction interpreted from the Galápagos fossil record is probably hundreds of times less than the modern rate of human-related extinction.

Original languageEnglish (US)
Pages (from-to)126-133
Number of pages8
JournalQuaternary Research
Issue number1
StatePublished - Jul 1991

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Earth-Surface Processes
  • General Earth and Planetary Sciences


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