Photos: 100 million-year-old fossils preserved in Vietnam

The specimens of thousands of millions of years old reflect the evolutionary history of the earth's crust from the primitive age. Each sample bears its own hallmark of the formation, development and extinction in the biota evolutionary sequence.

The biota evolution room of the Vietnam Museum of Nature (18 Hoang Quoc Viet Road, Hanoi) exhibits thousands of specimens of fossils, rocks, and minerals selected from different areas in Vietnam and other countries. The rock and mineral samples all date back to 2,936 million to 541 million years, related to the operation of magma, sedimentary in Hoang Lien Son, Vietnam.

The fossil specimens are the history of stones, illustrating the evolutionary history of life on Earth through geological dates from 600 million years ago to the present day.

The 4-ray coral populations with the scientific name Nipponophyllum nikolaevae Khoa. This is the first native species found by Dr. Nguyen Duc Khoa in 1996 but it has not been published. The fossils are 427- 423 million years old.

The jellyfish fossil with the scientific name Cyclomedusa davidi provided by the Natural History Museum in London, dating back 605-543 million years ago.

This piece contains apatite ore, dating back to 541 million years ago.

Fossil of beetle Paradoxides gracilis (Arthropoda).

Fossil of beetle Vietnamia douvillei (Mansuy). This species became extinct 250 million years ago. The fossils were collected in 2008.

Chrysanthemum (Ammonoidea) with scientific name Dumortieria lantenoisi (Mansuy) was collected in the Tri An hydroelectric dam, Dong Nai province (182.7 to 174.1 millions of years). The specimen was bought from a collector in Buon Ma Thuot City, Dak Lak province in 2010.

This plant fossil dates back to 174.1 to 163.5 million years ago.

Wood fossil of 174.1 to 163.5 million years ago. It was bought from a collector in Dak Lak province.

This plant fossil dates back to 23 to 5.3 million years ago.

The ocean sunfish. The ocean sunfish, Mola mola, or common mola, is the heaviest known bony fish in the world. It has an average adult weight of 1,000 kg (2,200 lb). The species is native to tropical and temperate waters around the globe. It resembles a fish head with a tail, and its main body is flattened laterally. Sunfish can be as tall as they are long when their dorsal and ventral fins are extended. It is named in the Vietnam Red Book.

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Photos: 100 million-year-old fossils preserved in Vietnam

The specimens of thousands of millions of years old reflect the evolutionary history of the earth's crust from the primitive age. Each sample bears its own hallmark of the formation, development and extinction in the biota evolutionary sequence.