The fossils of the Burgess Shale, like the Burgess Shale itself, formed around 505 million years ago in the Mid Cambrian period. They were discovered in Canada in in 1886, and Charles Doolittle Walcott collected over 60,000 specimens in a series of field trips up from 1909 to 1924. After...
Define Burgess Shale fossils. Burgess Shale fossils synonyms, Burgess Shale fossils pronunciation, Burgess Shale fossils translation, English dictionary definition of Burgess Shale fossils. A rock formation in the western Canadian Rockies containing a we
Burgess Shale fossils from B.C. are oldest adult swimming jellyfish ever found, scientists say. A smaller Burgessomedusa phasmiformis jellyfish is preserved above a larger specimen in this photo taken at the Burgess Shale fossil site in B.C. Tentacles can be seen on...
Burgess Shale fossils from B.C. are oldest adult swimming jellyfish ever found, scientists say. A smaller Burgessomedusa phasmiformis jellyfish is preserved above a larger specimen in this photo taken at the Burgess Shale fossil site in B.C. Tentacles...
The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups. For example, a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown group of arthropods (a category of animals that includes insects, spiders, mites, and ...
theBurgess Shale,a 540-million-year-old formation of black shale in the Rocky Mountains of British Columbia. Unlike most rocks in which fossils are preserved, the Burgess Shale preserved the soft parts of organisms that normally would have rotted away (by reacting with oxygen) before the ...
解析:段落倒数第二句话“The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups.”意思是:Burgess Shale Formation也有很多当今动物群组中已经灭绝的动物代表。段落最后一句“For example, a well-known Burgess Shale animal called Sidneyia is a representative of a ...
The first direct evidence for the early origin of eyes comes from fossils that are about 530 million years old, a time shortly after the Cambrian explosion; they were found on a mountainside in British Columbia in a deposit known as the Burgess Shale. The Burgess Shale fossils are extraordinar...
The first direct evidence for the early origin of eyes comes from fossils that are about 530 million years old, a time shortly after the Cambrian explosion; they were found on a mountainside in British Columbia in a deposit known as the Burgess Shale. The Burgess Shale fossils are extraordinar...
TPO-5-3：The Cambrian Explosion The geologic timescale is marked by significant geologic and biological events, including the origin of Earth about 4.6 billion years ago, the origin of life about 3.5 billion years ago, the origin of eukaryotic life-forms (living things that have cells ...