Harry S. Truman Dam and REservoir, Missouri, Mitigation of the Adverse Effects upon the Local Paleontological Resources. Volume 1.
Final rept. 1977-1981,
ILLINOIS STATE MUSEUM SOCIETY SPRINGFIELD
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Two fossil assemblages are described from Trolinger Spring deposits. The earlier assemblage contained 118 referred fossil vertebrate specimens. Accumulation occurred prior to 35,000 years ago. The assemblage represented a grazing fauna, co-dominated by mammoth and bison. Associated plant macrofossils indicate that a deciduous community dominated the landscape during this interval. The later assemblage contained 385 referred fossil vertebrate specimens. Accumulation occurred sometime during the interval 29,000-34,000 years ago. This assemblage represented a browsing fauna, dominated by mastodon. Associated pollen indicate that an open pine-parkland community existed in western Missouri during this interval. The Jones Spring fossil assemblage contained 812 referred fossil vertebrate specimens. Accumulation occurred during the interval 40,000-49,000 years ago and was episodic or punctuated. Discrete faunas could not be isolated in Jones Spring sediments and the fauna is treated as a single, diverse assemblage lacking temporal and a environmental unity. The fauna was dominated by mastodons. Plant macrofossils of deciduous species, dated at 48,900 years ago, were associated with the vertebrate fossils in the basal sediments. Pollen associated with the vertebrate fossils in overlying sediments indicate that the earlier deciduous community was succeeded by an open pine-parkland community before 40,000 years ago.
- Geology, Geochemistry and Mineralogy