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Title: First Highly Stratified Prehistoric Vertebrate Sequence from the Galapagos Islands, Ecuador 
Author: Steadman, David W.; DeLeon, Valerie Burke
Date: 1999-04
Publisher: University of Hawai'i Press
Citation: Steadman DW, DeLeon VB. 1999. First highly stratified prehistoric vertebrate sequence from the Galapagos Islands, Ecuador. Pac Sci 53(2): 129-143.
Abstract: We report an assemblage of ca. 6900 vertebrate fossils from a
preliminary excavation at Barn Owl Cave, Isla Floreana, Galapagos Islands,
Ecuador. Age of this stratified deposit ranges from historic times (less than
200 yr old) to the early Holocene (at least 8290 ± 70 radiocarbon years B.P.,
which equals 7485-7055 B.C.). Five of the 11 indigenous species identified thus
far from the bone assemblage no longer occur on Floreana. Their extirpation is
due to human influence over the past two centuries. The sedimentary and faunal
compositions of the Barn Owl Cave bone deposit may reflect paleoclimatic
changes, with relatively wet intervals indicated by darker, more clayey sediments
and a relative scarcity of bones of the Floreana lava lizard (Micro/aphis
grayii). Further excavation at Barn Owl Cave is likely to yield insights into the
timing and extent of late Quaternary climatic and faunal changes in the Galapagos
ISSN: 0030-8870

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