| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1753426 | International Journal of Coal Geology | 2013 | 12 Pages |
Abstract
⺠We analyze terpenoid in sediments of Miocene lignite and clay beds, and plant fossil. ⺠Coniferous diterpenoid is mainly detected in sediments in the lignite and clay beds. ⺠Low hopane isomer ratio and biosterol detection show the lignite seams are immature. ⺠Lower stanol/sterol ratios of lignite seams are due to microbial reduction in swamp. ⺠Angiosperm-derived triterpenoids are detected as contaminant in a conifer fossil.
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Authors
Ken Sawada, Hideto Nakamura, Takaaki Arai, Minoru Tsukagoshi,