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fish =)
answer 2 In Ediacara, Australia, appear very early soft bodied fossil shapes in the fine shale. These date from 635 Mya to 540Mya. These are thought have appeared soon after emergence from the cryrogenic period of rather chilly Earth's history. They flourished into the pre Cambrian period.
The Burgess Shale beds of N America are also prolific record to very early (pre) Cambrian fossils.
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Even earlier was the emergence of algae, and these have left their mark in India's Vindhya region with dates of 1.6 - 1.7 Gya. (The Earth has an age of about 4.5 Gy.)
We know that the emergence of algae caused a collapse of CO2 and Methane in the Earth's history, and this reverse greenhouse effect pushed the world into a snowball earth condition for perhaps a billion years. The oxygen these early algae produced, oxidized the dissolved iron in the seas, and precipitated it as the 'banded iron beds' of commercial importance today. Portions of these may be analysed for age and O2 content. [Gya = 109 years ago, Mya = 106 years ago.]
The algae survive today, notably as the seaweeds.
What else can I help you with?
When did the first land plants and animals appear in the fossil record?
The first plants with spores, which indicates that they were land plants, appeared in the Middle Ordovician period, about 470 million years ago. First records of tetrapods, or land animals, show up in the fossil record around 370 million years ago.
When did modern humans appear on earth according to fossil records?
According to the fossil records, the modern humans did appear on earth more than 130,000 years ago.
What are two things that scientists learn from the fossils record?
The fossil record provides evidence about the history of life and past environment on earth. The fossil record also shows that different groups of organism have changed over time.
How many years ago were protists first found in the fossil record?
Protists were first found in the fossil record around 2.1 billion years ago.
When did abundant fossil evidence first appear in the geologic record?
Abundant fossil evidence first appeared in the geologic record during the Cambrian Period, around 541 million years ago. This period is known as the "Cambrian Explosion" because it marked a rapid diversification of marine life and the emergence of many major animal groups.
When did the Equus first appear in the fossil record?
The Equus genus first appeared in the fossil record around 4 million years ago during the Pliocene epoch.
Why is the fossil record unable to provide a full portrait of the times in which the fossilized animals and plants live?
The fossil record is incomplete.
When did the first land plants and animals appear in the fossil record?
The first plants with spores, which indicates that they were land plants, appeared in the Middle Ordovician period, about 470 million years ago. First records of tetrapods, or land animals, show up in the fossil record around 370 million years ago.
Is the fossil record complete?
No, the fossil record is not complete. Not all animals and plants were fossilized during the last 4 billion years of the earths existence.
What link do seed ferns represent in fossil record?
The first fossil records of vascular plants that is land plants with vascular tissues Fossil ferns and seed ferns include Pecopteris Cyclopteris
Are fossils records complete or incomplete?
Fossil records are not complete. By some estimates, less than 1% of organisms that have lived appear in the fossil record.
What is the chronological collection of life's remains found in layers of rock?
The answer is the fossil record :D
According to the fossil record when did the first prokaryotic cells appear on your planet?
2.5 billion years ago
Is the fossil complete?
No, the fossil record is not complete. Not all animals and plants were fossilized during the last 4 billion years of the earths existence.
What was the first key hominid trait to appear in the fossil record?
The first key hominid trait to appear in the fossil record is bipedalism, which refers to the ability to walk upright on two feet. This adaptation is characteristic of early hominids and distinguishes them from their primate ancestors.
Why is the fossil record unable to provide a full portrait of the times in which the fossilized animals and plants lived?
The fossil record is incomplete because not all organisms fossilize, and not all fossils are found or preserved. Fossilization depends on specific conditions such as rapid burial and mineralization. Therefore, the fossil record only represents a small fraction of the organisms that lived in the past.
According to the fossil record which group of organisms has existed for the greatest length of time gastropods corals mammals or vascular plants?
Corals have existed for the greatest length of time according to the fossil record, dating back over 500 million years.
