The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.
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。
An increasingly attractive theory holds that decreases in atmospheric carbon dioxide start the cooling trend that leads to glaciation.
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。
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.
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。
These hills were formed by glaciation.
这些山丘是冰川作用形成的。
Astronomical cycles have an effect on Earth's climate even during periods when there is no glaciation.
即使在没有冰川的时期，天文周期也会对地球的气候产生影响。
We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.
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。
It was apparent that the glaciation occurred in the relatively recent past because the drift was soft, like freshly deposited sediment.
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。
Yet Rampino and others question one of the traditionalists' basic assumption: the periodic occurrence of glaciation throughout Earth's history.
然而，兰皮诺和其他人对传统主义者的一个基本假设提出了质疑：在整个地球历史中，冰川期是周期性发生的。
Glaciation, Young claims, has occurred throughout Earth's history, and there is evidence that it occurred toward the end off the Permian period.
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。
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。
If the Earth-Sun distance were as little as 1 percent larger, runaway glaciation on Earth about 2 billion years ago would have caused the oceans to freeze and remain frozen to this day.
如果地球与太阳的距离再大哪怕1%，大约20亿年前地球上失控的冰期就会导致海洋冻结，并一直冻结到今天。
Evidence of a wooden hut found at Terra Amata, near Nice in France, was dated to the Mindel Glaciation.
在法国尼斯附近的阿马塔发现了一间棚屋遗迹，时间上可追溯至民德冰期时期。
It has been shaped by the Pleistocene Glaciation.
东海岸是在更新世的冰川作用下形成的。
Is there a Quaternary glaciation in southeastern Sichuan?
川东南有第四纪冰川吗？
Pleistocene glaciation caused the extinction of many species.
第四纪冰期，使许多物种绝灭。
Pleistocene glaciation caused the extinction of many species.
有些物种由于人们的无和而灭绝。
Review and prospects of Quaternary Glaciation research in China.
中国第四纪冰川研究的回顾与展望。
The Quaternary glaciation started just a few million years ago – and is still going on.
第四纪始于几百万年以前，并延续到现在。
It has excellent geological record of glaciation. Look at the smooth rocks polished by ancient glaciers.
它有极佳的冰川地质上的纪录，瞧那些被远古冰河磨成平滑的岩石。
Geologically speaking, the park's landscape was formed by two processes: mountain-building and glaciation.
地质上说，公园的景观形成了两个过程：山区建设和冰川。
Studies show that the formation of the ice bodies in the ice cave is related mainly to Quaternary glaciation.
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。
Discovery of Paleo-glacier traces in the area support the argument of Pleistocene glaciation in eastern China.
连云港云台山古冰川遗迹的发现，为我国东部古冰川遗迹的研究，又增添了新的证据。
During the last glaciation, the glacier types were wide-tail valley glacier, valley glacier and cirque glacier;
冰川类型为宽尾山谷冰川、山谷冰川和冰斗冰川；
The canyon is a classic V-shaped valley, indicative of river-type erosion rather than erosion caused by glaciation.
大峡谷是一个典型的V形河谷。这表明了大峡谷是河道型侵蚀，而不是冰川引起的侵蚀。
These changes alter the intensity of sunlight hitting the Earth at high latitudes, and so affect the extent of glaciation.
这些变化改变了高纬度区域的日照强度，由此影响了冰河作用的范围。
Besides the Bow Valley, evidence of glaciation also appears in this image south of the lake, in the amphitheater-shaped cirque.
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。
There are abundant traces of ancient glaciation distributed on the high mountain belt of the mount Tai-Bai and its near areas.
在太白山及其邻近地区的高山带，分布着大量的古冰川地貌。
Organisms were also affected by periods of glaciation that followed variations in the earth's orbit and in the output of energy by the sun.
生物也受冰河期影响，在冰河期，地球轨道和太阳能的输出都发生了很大变化。
Organisms were also affected by periods of glaciation that followed variations in the earth's orbit and in the output of energy by the sun.
生物也受冰河期影响，在冰河期，地球轨道和太阳能的输出都发生了很大变化。
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