这些山丘是冰川作用形成的。
很明显冰川作用就发生在相对不远的过去，因为漂流物很软，像新鲜的沉积物。
It was apparent that the glaciation occurred in the relatively recent past because the drift was soft, like freshly deposited sediment.
然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。
The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.
杨说，冰川作用在地球的整个发展历史中都有发生，有证据表明它发生在二叠纪末期。
Glaciation, Young claims, has occurred throughout Earth's history, and there is evidence that it occurred toward the end off the Permian period.
我们现在通过测量掩埋在漂流物中木头放射性的碳-14元素，以精确地确定冰川作用的时期。
We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.
一个越来越有吸引力的理论认为，大气中二氧化碳的减少引发降温趋势，这趋势导致冰川作用。
An increasingly attractive theory holds that decreases in atmospheric carbon dioxide start the cooling trend that leads to glaciation.
到二十世纪初，科学家们认为，在更新世期间，有四次不同的冰川作用对北美和欧洲产生了影响。
By the early part of the twentieth century, scientists believed that four distinct glaciations had affected North America and Europe during the Pleistocene epoch.
最后一次冰川作用的漂浮物沉积在最近的其中一个地质时期——更新世，这段时期从180万年前持续到1万年前。
The drift of the last glaciation was deposited during one of the most recent epochs of geologic time, the Pleistocene, which lasted from 1.8 million to 10,000 years ago.
最后，阿加西和其他人说服了地质学家和普通大众，一个巨大的大陆冰川作用已经把极地冰帽延伸到了现在享受温带气候的地区。
Eventually, Agassiz and others convinced geologists and the general public that a great continental glaciation had extended the polar ice caps far into regions that now enjoy temperate climates.
覆盖着冰或者受冰川作用的影响。
东海岸是在更新世的冰川作用下形成的。
发现全球大气循环变化同冰川作用的相互影响。
The interaction of the global atmosphere circulation change and state of glaciation was found.
庐山东南麓第六阶地基座上，发现了早更新世冰川作用表皮构造。
The glaciated surface structures of the early pleistocene were discovered in the autumn of 1984, on the sixth terrace base which is located at the southeastern piedmont of Lushan.
初步研究表明，冰洞洞体的形成，主要与该区第四纪早期冰川作用有关。
Studies show that the formation of the ice bodies in the ice cave is related mainly to Quaternary glaciation.
除了被迷你汪卡湖占据的弓河谷外，冰川作用的证据还可以在南部的圆形冰斗处找到。
Besides the Bow Valley, evidence of glaciation also appears in this image south of the lake, in the amphitheater-shaped cirque.
在新元古代晚期地球上曾发生过全球性的冰川作用，一些学者称之为“雪球”事件。
Global glaciations took place in the earth in Neoproterozoic, which are called the "Snowball earth" event by some scholars.
有的学者将各种畸形砾石称之为“冰川变形石”，并作为中国东部第四纪冰川作用的证据。
Various distorted gravels were called glacier deformed stones by Li Siguang (J. S. Lee) and his supporters and were taken to be the evidence for Quaternary glaciation in eastern China.
研究区海子山位于青藏高原东部的沙鲁里山中段，在第四纪期间经历了大幅度构造抬升及第四纪冰川作用。
The Haizi Shan, located in the central Shaluli Mountain, eastern Tibetan Plateau, experienced tectonic uplift of great amplitude and extensive glaciation during the Quaternary.
研究区海子山位于青藏高原东部的沙鲁里山中段，在第四纪期间经历了大幅度构造抬升及第四纪冰川作用。
The Haizi Shan, located in the central Shaluli Mountain, eastern Tibetan Plateau, experienced tectonic uplift of great amplitude and extensive glaciation during the Quaternary.
应用推荐