本帖最后由 人与自然 于 2012-3-17 13:18 编辑
据英国《每日邮报》3月14日报道，英国东部港市多佛市的著名地质景点-多佛白岩近日因极端天气发生大面积坍塌，导致重约数千吨、面积相当于一个足球场的巨块石灰石掉进大海中，堆成一座小山。专家认为，坍塌是因为雨水流入干旱期裂开的石缝，在近期的严寒天气中结冰膨胀，导致这块巨石逐渐松动，最终与悬崖脱离。地质演变需要历经几万年直至上亿年，能够有幸看到著名地质公园瞬间的变迁，极其壮阔的跃动，让然留下深刻印象。
多佛白崖（The White Cliffs of Dover）http://en.wikipedia.org/wiki/The_White_Cliffs_of_Dover
位于英国英格兰，作为英格兰的象征，人们很难登上多佛白崖的最高点。这个约100万年前形成的悬崖由细粒石灰石组成。悬崖的最高点在海滩之顶(Beachy Head)，那里的白垩层经过数百万年的沉积从下面的海滩中上升了500英尺(约152米)高。
多佛白崖位于北纬51°06'N，东经1°14'E，北纬51°12'N，东经1°24'E。白崖标志着英国接近欧洲大陆的最密切的 多佛位置一点。在晴朗的日子，都是悬崖峭壁很容易地从法国海岸可见。
峭壁主要是白色白垩石组成，其他主要是钙板，板形成碳酸钙颗石藻，单细胞浮游 藻类的遗骸沉没到海洋的底部产生的，并连同仍然底部众生，形成沉积物。燧石和石英中还发现白垩石。多佛崖面继续以每年1厘米的平均增长，虽然偶尔大块将下降。这发生在2001年，当大块的边缘，如一个足球场大，进入下跌通道。进一步大段倒塌到2012年3月15日英语频道。游客，因此，呼吁继续从悬崖边走。
在2005年的Radio Times的读者调查，多佛白崖被命名为英国第三大的自然奇观。
地理位置和基本海岸情况
太空上看白岩
地理位置
白岩地段情况
以下内容来自英国每日邮报：
http://www.dailymail.co.uk/news/article-2114912/White-Cliffs-Dover-Thousands-tons-chalk-crash-sea-large-section-collapses.htm
正面状况
An aerial view of the latest chalk slip at the White Cliffs of Dover
空中鸟瞰坍塌场景
The collapse may have been caused by rain over the winter months being absorbed into the chalk and freezing 原因是雨水流入干旱期裂开的石缝，在近期的严寒天气中结冰膨胀，导致这块巨石逐渐松动，最终与悬崖脱离
The Kent landmark has suffered large rockfalls before, most significantly in January last year 以前就有坍塌过的情况，尤其是去年的1月份
When the cliffs tumble, locals have described it as 'like a lorry going down the hill' 当地人形容坍塌时仿佛大货车滚下山
A spokeswoman for the National Trust - which looks after parts of the chalk grassland in the area - said the cliff-fall happened between Langdon Cliffs and South Foreland Lighthouse 发言人描述了坍塌的地点范围
Collapse: Thousands of tons of the White Cliffs of Dover have plunged into the sea in a landfall last Friday, Dover Coastguard said
多佛海岸警卫队说有数千吨的岩石崩坍至海
Dover Coastguard said no one was injured but that it serves as a reminder that if people are walking along the cliff-top or underneath, that the cliff can crumble away 多佛海岸警卫队说没有人因此受伤，建议游览者远离悬崖
Cliff investigation: Dover Coastguard said a full survey has yet to be carried out to determine the exact amount and length of cliff that crumbled on Friday 多佛海岸警卫队说，全面详细的调查尚未开始进行
Collapse: Thousands of tons of chalk fell from the white cliffs of Dover in an area known as Crab Bay. Here a woman surveys the damage
数千吨的岩石在这个成为蟹湾的地方崩坍而下，一个妇女受伤（与上面海岸警卫队的说法似乎有不同？）
Cliff face fall: The collapse may have been caused by rain freezing after being absorbed into the chalk and then expanding, causing it to weaken 原因与雨水渗透入岩石有关
Immortalised: A Spitfire flies over the White Cliffs which were popularised by Dame Vera Lynn's wartime song The White Cliffs of Dover 一架飞机飞过白岩 Famous landmark: The White Cliffs of Dover, with a lighthouse on top, seen from the car ferry port | 
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