cambrian造句
31. The Tazhong paleo-uplift is a multiple oil-gas accumulation play, and medium-large scale reservoirs have been found in the Carboniferous, Silurian, Ordovician and Cambrian Systems.
32. The soluble rocks in this area are the carbonate rock constructions of the Sinian, the Cambrian and the Ordovician period.
33. The Bed G bauxite of Shanxi massif, a paleoresiduum bauxite underlying Bangou Formation of Upper Carboniferous, occurs on the fossil erosion surface of Middle Ordovician of Upper Cambrian.
34. Hydrocarbon in the Ordovician petroleum accumulation system originated from the Cambrian and Lower Ordovician source rocks.
35. Kuanchuanpu biota is the Early Cambrian microfossil which is characterized as an early animal and plant fossil in the southern region of Shaanxi province.
36. Bryozoa was quite diversified in the Ordovician, but lacked fossil records in the Cambrian.
37. Cambrian stratigraphy well developed in Luxi ( west of Shandong ), and their sedimentary records possesses cyclicity.
38. Asphalt-bearing barite nodules were discovered in the marine deposit of the bottom of Lower Cambrian formation in the western margin of Tarim Basin located in the Xiorbrag area, Arksu.
39. The Cambrian - Ordovician strata in Luxi Block are very continuous and well exposed.
40. To the beginning of Cambrian period, there are a large number of small shelly animals, this indicates a new phase of development of biological kingdom.
41. Therefore the deficiency of pre-Cambrian fossil and the sudden emergence of Cambrian trilobite are like a double edged sword posing threat for the very foundation of Darwin evolutionism.
42. These new materials provide new evidence for the origin, evolution and the functional evolution of the metazoan during the early stage of the Cambrian explosion.
43. This event is significant for solving basic problems concerning the Cambrian biogeographic provinces, the geotectonic nature of the northern margin of the North China platform and mineral prospecting.
44. The Cambrian phosphoric ore is mainly composed of calcic phosphate, carbonate, silica and silicate minerals.
45. Heand colleagues in Germany and the US studied a database of fossilorganisms that lived on the sea floor from the Cambrian period, about500m years ago.
46. MEI Shi - long , 1991 . Middle and Late Cambrian conodont and trilobite biostratigraphy in Wanxian, Hebei . Unpublished Ph. D thesis of Peking University.
47. The microfossil plants of the two formations have their own peculiarities, but have some common elements too. This shows that the deposition of the Sinian and Cambrian were continuous.
48. The allochthon consists of the Presinian, Sinian and Cambrian system. The autochthon comprises the Devonian and Carboniferous system.
49. Mount Taishan is the representative place for the study of the Ante Cambrian geology in China.
50. It has an important significance for researching the evolution of the Early Metabiota of Cambrian.
51. Darwin argued that the question might be answered in future by the discovery of fossils in rocks that formed before the Cambrian period, in Precambrian times.
52. The last event marks the beginning of the Cambrian period.
53. The Pre - cambrian alumino - siliceous slate is the host rock of antimony deposit inHunan.
54. In Britain, Cambrian rocks are found in Wales and North - West Scotland.
55. Cambrian The earliest period of the Paleozoic era , about 590 - 510 million years ago.
56. Kudi ophiolite suite is composed of ultramafic rocks, gabbro, mantle source granitoid, basic volcanic rocks and flysch. It was formed during Sinian and Cambrian.
57. A new phylogenetic analysis suggests that this rare early Cambrian anthozoan be among the primitive crown cnidarians.
58. During the Cambrian to Ordovinian period, there was a very magnificent continental slope, which is band-shaped distributing along the line Shanghai, Wuxi, southern Anhui.
59. It holds also one of the most complete successions of the Cambrian strata known in China.
60. Abstract: The Gongxi barite deposit hosts in the Niutitang formation of the lower Cambrian.
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