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路人甲
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Photo Gallery: Jurassic Period

The Jurassic period (199.6 million to 145.5 million years ago) was characterized by a warm, wet climate that gave rise to lush vegetation and abundant life. Many new dinosaurs emerged—in great numbers. Among them were stegosaurs, brachiosaurs, allosaurs, and many others.

Four women at the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, China, underscore a 19-foot (5.7-meter), 200-million-year-old ichthyosaur fossil from southern China. Although its name is Greek for "fish lizard," Ichthyosaurus was no fish—it was a reptile that swam the Mesozoic oceans.

The late Jurassic Stegosaurus, like the pair walking through a North American forest in this illustration, was a slow-moving, plant-eating dinosaur that grew as long as 30 feet (9 meters) and as much as 2 tons. Its most impressive feature was a row of large plates and tail spines down the length of its back—some more than three feet (one meter) tall.

A herd of brachiosaurs congregates on a forested coast in this artist's depiction. At up to 92 feet (28 meters) and 50 tons, these sauropods (large, herbivorous dinosaurs) were much larger than any land animal alive today. Long, lean limbs, high shoulders, and a 30-foot-long (9-meter-long) neck allowed Brachiosaurus to graze from the treetops of North America and parts of Africa, where its fossils have been found.
Artwork by DEA Picture Library

An Allosaurus tramps through a Mesozoic-era forest in this artist's depiction. Allosaurus was the top predatory dinosaur of the late Jurassic period in North America. Not a particularly fast runner, it likely ambushed unsuspecting prey as it passed by.

The late-Jurassic Archaeopteryx lithographica, shown here with legs akimbo and wings outspread, is believed by many to be the world's first bird. Found in the Solnhofen Limestone Formation in Bavaria, Germany, Archaeopteryx lithographica possessed developed wings that probably allowed it to fly for short distances.

From : Nationalgeographic

鳥是恐龍!恐龍是鳥

2008-4-24 08:16 PM

Franco仔 (震旦紀)
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199.6 million to 145.5 million years ago(侏羅紀時代)
復原圖很Beautiful呀''

[ 本帖最後由 Franco仔於 2008-4-24 10:15 PM 編輯 ]

我愛活化石!

2008-4-24 10:11 PM

nelsonkeung
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照片廊：侏羅紀時代

侏羅紀時代（ 199600000至1.455億年前）的特點是溫暖，潮濕的氣候產生了茂密的植被和豐富的生活。許多新的恐龍出現了-在偉大的號碼。其中有stegosaurs ， brachiosaurs ， allosaurs ，和許多其他問題。

四名女子在研究所脊椎動物與古古在北京，中國，強調了19英尺（ 5.7米）， 200萬，今年歲ichthyosaur化石從中國南部。雖然它的名字是希臘為“魚蜥蜴， ” ichthyosaurus沒有魚-這是一個爬蟲類動物的泳手人數中生代的海洋。

晚侏羅世劍龍一樣，一雙穿過北美森林在這方面的例子，是一個緩慢的移動，植物吃恐龍的增長，只要在30英尺（ 9米）和多達2噸。其最令人印象深刻的特點是一排大板和尾刺下來的長度及其後備一些超過3英尺（ 1米）高。

一群brachiosaurs congregates在一個森林海岸在這方面藝術家的寫照。在高達92英尺（二十八米）和50萬噸，這些sauropods （大，草食性恐龍）要遠遠大於任何土地，今天活著的動物。長期以來，精益四肢，高的肩膀上，和一個30英尺長（ 9米長）頸部允許腕龍，以放牧從樹叢北美和非洲部分地區，其化石的發現，已找到的。
作品由DEA的圖片庫

1 allosaurus tramps通過一個中生代時期的森林在這方面藝術家的寫照。 allosaurus是最大的掠奪性恐龍的晚侏羅世期間在北美地區。不是特別快亞軍，這可能是伏擊，毫無戒心的獵物，因為它通過。

晚侏羅世始祖鳥lithographica ，在這裡顯示akimbo與腿和翅膀延伸，相信是許多人成為世界上第一個鳥。發現，在索倫霍芬灰岩地層，在德國巴伐利亞州，德國，始祖鳥lithographica擁有發達的翅膀，可能允許它飛為短距離。

來自： nationalgeographic

2008-4-26 11:25 AM

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