地质研究表明，里海曾经是被称为副特提斯海的史前海洋的一部分。
Geological research indicates that the Caspian sea was once part of a prehistoric sea known as the Paratethys.
例如，他提到一篇科学论文中言及苔藓，细菌和其他类似的生物可能是史前地质情况和陆地形成的推动力。
For example, he mentions a scientific paper that suggests that lichens, bacteria and the like may have been a driving force behind prehistoric geology and the formation of continents.
这种史前的地质奇观经过数世纪的雨袭和侵蚀而成。
These prehistoric geologic wonders known as slot canyons have been craved by centuries of rain and erosion.
古生物学对出现在史前或地质时代的生命的形成的研究，体现在植物、动物和其它有机体的化石上。
The study of the forms of life existing in prehistoric or geologic times, as represented by the fossils of plants, animals, and other organisms.
古生物学对出现在史前或地质时代的生命的形成的研究，体现在植物、动物和其它有机体的化石上。
The study of the forms of life existing in prehistoric or geologic times, as represented by the fossils of plants, animals, and other organisms.
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