USGS · 70010485
Enclosed bark as a pollen trap
Abstract
Counts were made of pollen in traps formed by enclosed bark in two remnants of bristlecone pine, Pinus aristata Engelm., from the White Mountains of east-central California. The traps, dated by tree-rings at A.D. 350 and 1300 B.C., contained a major complex of pine-sagebrush pollen and traces of other species, representing the equivalent of the present vegetation.
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D.P. Adam, C.W. Ferguson, V.C. Lamarch. 1967. Enclosed bark as a pollen trap. https://doi.org/10.1126/science.157.3792.1067
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