| Budget Amount *help |
¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
An Orsten-type fossil Lagerstaetten is an extraordinary case of detailed three-dimensional preservation of the soft parts of minute animal carcasses replaced by calcium phosphate. Detailed observation revealed that the phosphorus was mostly concentrated in the fecal pellets around the carcasses, and that the minute animal carcasses preserved in such “cesspools” were exceptionally phosphatized during early diagenesis owing to local depositional conditions, i.e., the high phosphorus levels of the accumulated fecal pellets. Allied modes of fossil preservation are now discovered from several places, e.g., the Quaternary boring cores in Japan. These suggest that the Orsten-type Lagerstaetten are not peculiar to Cambrian age but general phenomena in various ages and places, in which fecal pellets are locally accumulated as phosphorus source.
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