Ediacaran

had small horseshoe shaped heads. These worms resemble the modern Tomopteridae, which have heads similar to those of the Precambrian fauna, only wider. It now appears as though these marine worms are direct descendants from the ancient forms.The Ediacaran organisms are a clear foreshadowing of one of the most dramatic events in all of life's history-the rapid expansion of shell-bearing organisms. The earth's

late Ediacaran and early Cambrian period. It introduced a number of phyla on the Earth, and significantly affected the animal

(1987), the Precambrian-Cambrian boundary is located in-between Ediacaran Fauna, which is found somewhere between 620-700 million years ago and trilobites, such as the fallotospid group. This creates a period ranging between 30-50 million years in which we can define the Precambrian-Cambrian boundary, making it difficult

history, over the past 600 million years can be observed at Hallett Cove. Some of the oldest rocks have been found in these seas. The finding of the Ediacaran could potentially mean that there can be dinosaur fossils found in the ocean, or even that relatives of the ediacaran could be considered fossils and could be found in the sea. Although the Ediacaran period was well before the first appearance of dinosaurs it shows that there were fossils many years ago. When dinosaurs first appeared things had

While creationism is seemingly a very hopeful explanation for the creation of animal phyla by a supernatural force or being, this overlooks the potential of preservation bias and true triggers causing this explosion. Earth’s forces created the events of the Cambrian era. From glaciation, to change in oxygen, to distinct ecological interactions, there are true explanations we can observe from our planet’s history. The likelihood of the Cambrian Explosion seeming more dramatic due to fossil records

Fossils found in our oceans are of the Ediacaran. This is not our only sea animals creating more evidence of dinosaurs being in SA, there has been rare and precious bones found in the floor of the 120 million year old Eromanga sea. This is clear evidence of dinosaurs roaming the shores of the inland

The Evolution of Animals Eukaryotes come in two grades of organization: single-celled (protists) and multicellular (plants, animals, and fungi). The world today is full of complex multicellular plants and animals: how, why, and when did they evolve from protists? Proterozoic Protists A single-celled eukaryote or protist can carry chlorophyll (it can be an autotrophic, photosynthetic, "alga"), it can eat other organisms (it can be an organotrophic, "protozoan" "animal"), or it may do both

millions of years although it is described as rapid in geological terms. In this period of time, the Earth saw the rapid appearance of a wide variety of animals. Ecosystems became much more complex in the Cambrian Period to those that were seen in Ediacaran Period. As the variety and number of new organisms increased, they started to occupy new marine habitats and environments. Cambrian seas saw many animals of different shapes and sizes; some lived on the sea floor while others swam in the water. Early

Amongst all of the biological events in history, the Cambrian explosion was one of the most spectacular because it gave rise to a vast majority of different animals. This event occurred at the beginning of the Paleozoic era. The Explosion is said to have occurred between 540- 542 million years ago. This event is termed as an explosion because of the gigantic outburst of different species. The radiation brought about diversity, which is an important factor and advantage in the ecosystem, environmental

surface to be shielded from solar radiation. This was the start of the first unicellular organisms. The first multicelled animals started appearing in the records of fossils around 600 million years ago. Fossils found at this time were known as Ediacarans and showed a very important time of evolution for earth. Ediacara fauna was specifically named after the Ediacara hills in South Australia in which they were discovered in the early 1900’s. These organisms even predate the explosion of life forms