| Abstract: | Annually laminated (varved) Holocene sediments from Derby Lake, Michigan, display variations in endogenic calcite abundance reflecting a long-(millennial-scale) decrease in burial punctuated with frequent short- (decadal-scale) oscillations due to carbonate dissolution. Since 6000 cal yr B.P., sediment carbonate abundance has followed a decreasing trend while organic-carbon abundance has increased. The correlation between organic-carbon abundance and the sum of March-April-October-November insolation has an r2 value of 0.58. We interpret these trends to represent a precession-driven lengthening of the Holocene growing season that has reduced calcite burial by enhancing net annual organic-matter production and associated calcite dissolution. Correlations with regional paleoclimate records suggest that changes in temperature and moisture balance have impacted the distribution of short- oscillations in carbonate and organic-matter abundance superimposed on the precession-driven trends. |
| Genre: | Article |
| ProdID: | 70004015 |
| Citation Author: | Wittkop, Chad A.; Teranes, Jane L.; Dean, Walter E.; Guilderson, Thomas P. |
| Citation Contributing Office: | Geology and Environmental Change Science Center |
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| Citation End Page: | 698 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Phsyical Description: | 4 p. |
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| Citation Publisher: | Geological Society of America |
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| Citation Search Results Text: | A lacustrine carbonate record of Holocene seasonality and climate; 2009; Article; Journal; Geology; Wittkop, Chad A.; Teranes, Jane L.; Dean, Walter E.; Guilderson, Thomas P. |
| Citation Start Page: | 695 |
| Citation Volume: | 37 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | A lacustrine carbonate record of Holocene seasonality and climate; 2009; Article; Journal; Geology; Wittkop, Chad A.; Teranes, Jane L.; Dean, Walter E.; Guilderson, Thomas P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://mr.crossref.org/iPage/?doi=10.1130%2FG30056A.1 |
| Date Other: | Tue, 7 Jun 2011 10:50 -0500 |
| Publisher: | Geological Society of America |
