The geologist found many uncovered fossils in the valley.

那山谷里,地质学家发现了许多裸露的化石。

Inland foraminifer fossils are considered as one of good indicators of marine facies.

内陆有孔虫化石群被一些学者视为是海侵或残留海的指相化石。

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.

羌塘南部地区发现有可靠化石依据的早古生代地层存尚属首次。

Based on the study of the Silurian sections in the Kalpin area of the northwestern Tarim Basin, eight ichnogenus and eight ichnospecies were recognized in the Lower Silurian Tataaiertage Formation.

通过对里木盆地柯坪地区志留系格组上段遗迹化石的研究,识别出8属8种。

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.

对于为什么我们没有发现大量的属于这个比寒武纪还要早的时期的化石，我无法给出满意的答案。

Dendrochronology A method of archaeological dating by the ANNUAL RINGS of tree, used when the lifespans of living and fossil trees in an area overlap.

一定的区域内当生活树木以及化石树木的寿命有重叠时，通过树木的年轮来推测考古学年代的方法。

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、南非出土的人科化石。

Darwin expected species to change slowly, but not at the same rate – some organisms such as Lingula were unchanged since the earliest fossils.

达文认为物种变化是缓慢的，但不是以同样的速度变化--一些如海豆芽一样的生物从最早的化石以来未发生改变。

No creditable macrofossil record of the Fagaceae exists in the Cretaceous deposits and all the Cretaceous microfossil reports remain equivocal and require further study.

白垩纪尚无壳斗科可靠的大化石记录，微化石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分化出两个类群。

It is believed to be a hadrosaur, although the Missouri remains were first thought to belong to a small sauropod ("Neosaurus", renamed Parrosaurus).

虽然密苏里州发现的化石最初被认为是属于细小的蜥脚下目，但估计牠是属于鸭嘴龙超科。

In this paper the sample preparation techniques of radiolarite were discussed in order to get high quality secondary electron images in SEM.

讨论了为获得放射虫化石的高质量的二次电子图像所采用的试样制备方法。

In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us.

2003年夏天，我们开始瞄准一种微化石的类型，其复杂的形态特徵特别引起我们兴趣。

Perhaps 20 or more hominids (not all of them our ancestors) fill the gap between Lucy the australopithecine and modern humans.

阿法南猿（露西）与现代人之间，人科动物的化石也许超过20种（他们不全是我们的祖先）。

In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins.

它们看起来像一棵棵巨型的芦笋。隧道内黯淡的灯光下，页岩顶部30英尺长的石松化石遗迹就像鳄鱼皮般发出柔滑的光亮。

The thorax and pleon bear a number of lateral appendages, including the gills, and the tail ends with a telson.

另一个古老的特征是甲壳亚门动物分叉的足，这样的足化石中的三叶虫就已经有了。

Experimental results showed that double coats of carbon and gold on the conductive coating of radiolarite should be used.

通过多次试验，认为放射虫化石的表面导电处理应采用碳-金双层镀膜法。