the fossils are extracted from the chalk.
这些是从白垩岩中剥离出来的。
the fossils are extracted from the chalk.
这些是从白垩岩中剥离出来的。
The fossils may be a million years old.
这些可能有100万年了。
embed a post in concrete; fossils embedded in shale.
把在水泥中;牢牢
在页岩中的
The geologist found many uncovered fossils in the valley.
在那山谷里,地质学家发现了许多露的
。
Inland foraminifer fossils are considered as one of good indicators of marine facies.
内陆有孔虫群被一些学者视为是海侵或残留海的指
。
In organic lamina, the content of organic carbon exceeds 5% and algae fossils and ichthyolite are abundant.
其中有机质纹层中的有机碳含量在5%以上,富含藻类及鱼
等;
Glauconite, detrital carbonate skeletal debris, marine fossils, and collophane are commonly present.
海绿、碳酸盐骨骸碎屑、海
和胶磷矿普遍出现。
According to the conodont and fusulinid fossils,their ages are determined to be Devonian-Permian.
根据所含确定地层形成时代为泥盆纪至二叠纪。
From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian.
在羌塘南部地区发现有可靠依据的早古生代地层存在尚属首次。
2004年我们在玛依岗日一带变质岩系上部采获大量鹦鹉螺类和笔类
,经研究确定时代属中、晚奥陶世-志留纪.
From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian.
Rosenberg, a paleoanthropologist at the University of Delaware, specializes in pelvic morphology and has studied hominid fossils from Europe, Israel, China and South Africa.
罗森柏格是古人类学家,任教于美国德拉瓦大学,专长是骨盆形态,研究过欧洲、以色列、中国、南非出土的人科。
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