美國亞利桑那州高速公路發生嚴重塌陷，是另類的天坑嗎？

　　聽到「天坑」這個名詞，讓人想到是地表大面積塌陷形成的一種可怕的地形。自2009年起，在世界末日為題的電影「2012」的推波助瀾下讓人開始留意，但隨着2012年的過去漸漸讓人遺忘，但它仍舊出現，只是新聞媒體「選擇性報導」，才讓人忽略。

　　如果天坑這種不尋常現象在山坡發生，情況會怎樣？試看以下的於美國的地區新聞。

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美國亞利桑那州高速公路發生嚴重塌陷

　　2013年2月21日美國亞利桑那州交通部門關閉了89號公路附近的道路。

　　在週三上午因路面問題造成150英呎的路面彎曲和摺疊，亞利桑那州地質學會的負責人說，這個事件很可能是山體滑坡。

新聞來源：

http://www.kpho.com/story/21281568/pavement-buckles-closes-us-89-south-of-page?hpt=hp_t3

相關報導：

http://www.azfamily.com/news/US-89-south-of-Page-will-remain-closed-indefinitely-192335051.html

http://www.azdot.gov/CCPartnerships/News/NRel3400.asp

Pavement buckles, closes US 89 south of Page

A 150-foot section of U.S. 89 south of Page that buckled and sunk four feet Wednesday might have been caused by a "geologic event," according to the Arizona Department of Transportation.

The road collapsed at mile post 526 just 2.5 miles north of the intersection with U.S. 89A, about 25 miles south of page, according to an ADOT spokesman. He said the incident was not related to the weather.

The road was closed in both directions and there was no estimation when the highway would reopen, said an ADOT spokesman.

ADOT officials said northbound U.S. 89 was closed at the U.S. 89A junction, which takes motorists west toward Jacob Lake. In Page, U.S. 89 was closed at the junction with State Route 98.

Northbound motorists were being routed to U.S. 160 east to State Route 98, and north on SR 98 back to U.S. 89 in Page. The detour is about 45 miles longer than the direct route, the spokesman said.

The Coconino College campus in Page was also closed because of the road closure.

DPS reported a number of collisions within the collapse, but none appeared to be serious. No injuries were reported.

US 89 Pavement Buckle (February 20, 2013)

http://www.youtube.com/watch?v=lo7GHtpP5g4&NR=1&feature=endscreen&hd=1



US 89 Landslide - Geotechnical Assessments

http://www.youtube.com/watch?v=6dPTULyN4EE&hd=1