1. The Middle Carboniferous period was a main age that the Yilian-habirga crest zone was put together with the Wenquan-Sailimu and the Boluokenu tectonic belts.

2. During Carboniferous period, characteristics of deposition of Aqishan-Huangshan composite terrane that is the eugeosyncline type, are obviously controled by its boundary fault zones.

3. The Weining age of Carboniferous period in Tongling area is a transgressive one.

4. The Carboniferous period saw the appearance of the first extensive forests on Earth.

5. The new research is focused on the Carboniferous Period, when the supercontinent of Pangea was covered in tropical rainforests ruled by reptiles.

6. Silurian'. ' and before the Mississippian or Carboniferous Period, and characterized by the appearance of forests and amphibians.

7. Most coal fields began life as swamps about 300 million years ago in the Carboniferous period.

8. We do know that most coal fields began life as swamps about 300 million years ago in the Carboniferous period.

9. Much of the petroleum we use today began some 200 million years ago in the Carboniferous Period.

10. The Southwest Fujian Depression is on an important development stage in Carboniferous period.

11. This eventually resulted in the oxygen-rich atmosphere of the Carboniferous period around 340 to 280 million years ago.

12. According to space distribution of the sedimentary facies, Longhuo ancient platform was an isolated one, surrounded with troughs in the Carboniferous period.

13. Through the work of 1/50000 regional geological survey and the research of the sedimentary facies in the area, the author systematically sets up sedimentary sequence of Carboniferous period stratum.

14. The last of the six periods of the Paleozoic era , it follows the Carboniferous period.

15. We study the geology evolution of Houxia - Bogda region in Carboniferous period as a basin.

16. The metamorphic ages of the eclogites are largely 320～220 Ma ( Carboniferous period to Triassic period ).

17. There are great bifurcations as yet on the structural environment and on the evolution of the Xingmeng Paleozoic orogenic belt in Southeast Inner Mongolia during the Carboniferous Period.

18. Besides(), we also find that there are magma thermal actions during the Carboniferous period and early Permian period.