Trilobite
The difference between The differeence between the Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell creatures because of thee evolved predators. The difference between Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell creatures because of the evolved predators.rian fossils Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell creatures because of the evolved predators.
cambrian
Large numbers of fossils begin to appear around 530 million years ago. It is called the Cambrian Explosion, because it occurred in the Cambrian period. The Cambrian period was the first part of the Paleozoic era.
Cambrian
Cambrian period
The sudden appearance of most of the major animal phyla within the fossils early in the Cambrian period. This caused a sudden diversification of life.
Some of the unusual animals that lived in the sea 500 million years ago thrived tens of millions of years later than previously known, a treasure trove of fossils in Morocco has revealed. The fossils prove that the famously bizarre creatures of the Cambrian (542 million to 488 million years ago) didn't die out at the end of that period - something that fossil hunters had suspected, but could not back up with evidence until now.
Trilobites are one of the index fossils commonly found in Cambrian rock layers. These ancient arthropods lived in the seas during the Cambrian period and are used by geologists as markers for dating rocks from that time period.
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The presumed animal fossils first appeared during the Archaean Cambrian period. There is no clear indication why they appeared this late into history.
The Cambrian period, which lasted from approximately 541 million years ago to 485 million years ago, is known for the sudden appearance of diverse hard-shelled fossils. This period marked the rapid diversification of marine life and the emergence of many new forms of life in Earth's oceans.
There are rarer fossils, as in fossils that belong to creatures that haven't been discovered yet or are very uncommon, but no "best" fossil.