the fossils are extracted from the chalk.
这些化石是从白垩岩中剥离出来的。
the fossils are extracted from the chalk.
这些化石是从白垩岩中剥离出来的。
The fossils may be a million years old.
这些化石可能有100万年了。
embed a post in concrete; fossils embedded in shale.
把柱子嵌在水泥中;牢牢嵌在页岩中的化石
The geologist found many uncovered fossils in the valley.
在那山谷里,地发现了许多露的化石。
Inland foraminifer fossils are considered as one of good indicators of marine facies.
内有虫化石群被一些者视为是海侵或残留海的指相化石。
In organic lamina, the content of organic carbon exceeds 5% and algae fossils and ichthyolite are abundant.
其中有机纹层中的有机碳含量在5%以上,富含藻类化石及鱼化石等;
Glauconite, detrital carbonate skeletal debris, marine fossils, and collophane are commonly present.
海绿石、碳酸盐骨骸碎屑、海相化石和胶磷矿普遍出现。
According to the conodont and fusulinid fossils,their ages are determined to be Devonian-Permian.
根据所含化石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化石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岩系上部采获大量鹦鹉螺类和笔石类化石,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,任教于美国德拉瓦大,专长是骨盆形态,研究过欧洲、以色列、中国、南非出土的人科化石。
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