cambrian造句
61. During the Cambrian period, 500 million years ago, worm-like creatures were evolving into fish-like creatures.
62. It is based on the present writers' achievements of study and mapping of quantitative lithofacies palaeogeography of the Cambrian and Ordovician in North China, South China and Northwest China.
63. It consists of Archaeozoic and Paleozoic strata in which Cambrian and Ordovician are dominated by limestone. The tectonism and weathering make it become a good reservoir.
64. To the question why we do not find rich fossiliferous deposits belonging to these assumed earliest periods prior to the Cambrian system, I can give no satisfactory answer.
65. The discovery of the tempestites is of great significance to restructure the palaeogeography of Middle-Late Cambrian in Huangshi, eastern Hubei Province.
66. Cambro-Ordovician mudstones, upper Cambrian and Carboniferous gypsum rocks and the relatively tight lithologies have blocked the vertical migration of formation fluids in Tarim basin.
67. Thus, the "Cambrian Explosion" is a fairly unheard-of term outside the scientific community.
68. Afterward, global large-scale massive volcanic activity in Permian Period generally brought about metamorphism whole middle Cambrian Period volcanic sediment rock in research area.
69. Dengta marine built gypsum deposits occurred in Mantou Jianchang Formations, Lower Cambrian.
70. The area we debated is in infraneritic environment at the Meishucunian Age, early Cambrian Period, when deposited a suit of carbonate and phosphate.
71. The Cambrian and Ordovician are important exploration target strata in Leshan - Longnvsi paleo - uplift area.
72. Sedimentary type deposits usually formed during late Sinian to Cambrian period.
73. Gold mineralization of the zone is confined only to the Cambrian carbonaceous shale overlain by siliceous rocks, and apparently controlled by a premineral tough shear zone.
74. There is abundant karst fissure water in the limestone and dolomite of Cambrian and Ordovician.
75. The main mountain regions are the Cornish Heights, the Cambrian in Wales, the Cambrian Mountains (in Lake District) and the Pennies.
76. Paoma Pb - Zn deposit cataclastic zone of Lower Cambrian Maidiping dolomite. There are two ore horizons.
77. The Gongxi barite deposit hosts in the Niutitang formation of the lower Cambrian.
78. For almost a century, geologists studied more and more parts of the world and everywhere the first traces of fossilized creatures continued to crop up at the beginning of the Cambrian period.
79. Middle-Upper Cambrian dolomites in Shimen, Hunan Province, are mainly composed of anhedral micritic dolomite, euhedral and subhedral granular dolomites, grain dolomite.
80. The many achievements in the study on. the fossils (in especial megafossils) of late Precambrian - Cambrian in China are outlined.
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