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鳄鱼化石
价 格: 价格商议 卖家承担运费
数 量: 1 ( 已售) 担保费: 各出一半
类 别: 花鸟虫鱼 所在地: 广东省 广州市
人 气:   发 布: 2018-11-24
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藏品名称:鳄鱼化石   藏品类别:化石

藏品价格:EMB 议价

藏品描述展示

化石是存留在岩石中的古生物遗体、遗物或遗迹,最常见的是骨头与贝壳等。

化石,古代生物的遗体、遗物或遗迹埋藏在地下变成的跟石头一样的东西。研究化石可以了解生动物的演化并能帮助确定地层的年代。保存在地壳的岩石中的古动物或古植物的遗体或表明有遗体存在的证据都谓之化石。从太古宙(34亿年前)至全新世(1万年前)之间都有化石出现。

鳄鱼之所以引起特别关注乃因其在进化史上的地位:鳄是现存生物中与史前时代似恐龙的爬虫类动物相联结的最后纽带;同时,大量的各种鳄化石已被发现;4个亚目中有3个已经绝灭。根据这些广泛的化石纪录,有可能建立起鳄和其他脊椎动物间明确关系。

白垩纪晚期是哺乳动物进化史上的一个重要时期,在那段时间里,许多种群开始分化,以适应在不同的小环境下生存。戴维·克劳斯说:"鳄鱼从白垩纪晚期日趋多样化,大到5米长,小的不足1米,以适应不同生存环境的需要。

恐龙化石与恐龙蛋化石都是经过长期自然环境的变化形成,都是具有很高的经济价值、收藏价值和历史价值的。这个骨骼化石的长度是十四公分两头都是骨骼,那个大头儿的骨骼,那是九公分,小头儿骨骼是七公分。中间骨头鼓棒那个宽度。中间的骨棒,粗度是五公分。

此藏品是杨先生所收藏

Collection Name: Crocodile Fossil Collection Category: Fossil

Collection price: EMB bargaining

Collection Description display

Fossils are the remains of ancient organisms, relics or relics that remain in rocks. The most common are bones and shells.

Fossils, remains or remains of ancient organisms buried underground and turned into stone-like objects. Studying fossils can help us understand the evolution of animals and determine the age of strata. The remains of ancient animals or plants preserved in rocks of the crust or evidence of their existence are called fossils. Fossils appeared from Archean (3.4 billion years ago) to Holocene (10,000 years ago).

Crocodiles have attracted special attention because of their evolutionary status: crocodiles are the last link between existing organisms and prehistoric dinosaur-like reptiles; at the same time, a large number of various crocodile fossils have been found; and three of the four suborders have been extinct. Based on these extensive fossil records, it is possible to establish clear relationships between crocodiles and other vertebrates.

Late Cretaceous is an important period in the evolutionary history of mammals, during which many populations began to differentiate to survive in different small environments. "Crocodiles are becoming more diverse from the late Cretaceous, up to 5 meters long and less than 1 meter small, to meet the needs of different living environments," said David Klaus.

Dinosaur fossils and dinosaur egg fossils are formed through long-term changes in the natural environment, which have high economic value, collection value and historical value.The length of this skeleton fossil is fourteen centimeters. Both heads are skeletons. The skeleton of the big head is nine centimeters. The skeleton of the small head is seven centimeters. The width of the drum stick in the middle bone. The bone rod in the middle is five centimeters thick.

This collection is Mr. Yang's collection.

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