| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
This study examines the modes of construction and succession of Cambrian reefs in South and North China. The transition in composition and structure from archaeocyath-bearing to purely microbial reefs occurred in the Cambrian late Epoch 2 in South China. This change was caused by a decline in the diversity of metazoans, and was accompanied by a reduction in the abundance of reefs, possibly related to the late Epoch 2 regression. Cambrian Series 3 lithistid sponge-microbial reefs are found in North China and are precursors of the sponge-microbial reefs that dominated worldwide in the Early Ordovician. The findings suggest that lithistid sponge-bearing reefs were more extensive during the period from Cambrian Epoch 3 to the Furongian than previously thought.
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