Climatic significance of Late Pleistocene insect fossils from Marias Pass, Montana
A small insect fossil assemblage was recovered from Late Pleistocene lake sediment below the Mount St. Helens Jy ash near Marias Pass, Montana. The insect fauna contains several arctic, alpine, and open-ground beetles, including Bembidion sulcipenne hyperboroides and possibly Holoboreaphilus nordens...
| Published in: | Canadian Journal of Earth Sciences |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1988
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| Online Access: | http://dx.doi.org/10.1139/e88-089 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-089 |
| Summary: | A small insect fossil assemblage was recovered from Late Pleistocene lake sediment below the Mount St. Helens Jy ash near Marias Pass, Montana. The insect fauna contains several arctic, alpine, and open-ground beetles, including Bembidion sulcipenne hyperboroides and possibly Holoboreaphilus nordenskioeldi. This fauna, in conjunction with the plant macrofossil evidence, suggests that at about 11 400 BP tree line was at least 450 m lower than present. |
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