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The pre-Cambrian period which is a little over 630 million years ago. Before this era, there were no biota which leave a decent fossil impression - mainly soft-bodied forms. But see Ediacara in Wikipedia for more information.
The earth by comparison is about 4.5 billion years since formation in roughly its present form. [So 630/4.5 000 ]
What else can I help you with?
What is a number of rigid but moving pieces of earths surface?
Tectonic plates are the rigid but moving pieces of Earth's surface that float on the semi-fluid asthenosphere below. These plates interact at plate boundaries, leading to various geological phenomena like earthquakes, volcanic eruptions, and mountain formation.
What number of Earths could fit inside Satrurn?
833 Earths fit inside Saturn
Which planet orbits the sun in the greatest amount?
Mercury does the greatest number of revolutions, Neptune has an orbit with the greatest radius.
Where does the greatest number of thunderstorms occur in?
The greatest number of thunderstorms in the world occur in Lake Victoria, Uganda, Africa. In the United States, the greatest number of thunderstorms are seen in Lakeland, Florida.
Which country in the world has the greatest number of universities?
India has the greatest number of universities in the world, with over 1000 universities across the country.
How many times in the earths history has the number of species dropped drastically?
simple answer 6
Have the number and type of life forms remained fairly constant throughout earths history?
Ya
What is the phone number of the Geological Sciences in Blacksburg Virginia?
The phone number of the Geological Sciences is: 540-231-6894.
What is a number of rigid but moving pieces of earths surface?
Tectonic plates are the rigid but moving pieces of Earth's surface that float on the semi-fluid asthenosphere below. These plates interact at plate boundaries, leading to various geological phenomena like earthquakes, volcanic eruptions, and mountain formation.
What is the phone number of the Orton Geological Museum in Columbus Ohio?
The phone number of the Orton Geological Museum is: 614-292-6896.
How do you find a greatest number of a number?
Which number is greatest?0.0990.2920.3810.413
Which is the greatest prime number?
There is no greatest prime number.
What is the greatest number for a circle?
There is no greatest number for a circle.
What is the greatest number for 9100?
what is the greatest number for 9,100
What is the phone number of the Carter County Geological Society in Ekalaka Montana?
The phone number of the Carter County Geological Society is: 406-775-6886.
What is greatest negative number?
There is no greatest negative number. The greatest negative integer is -1.
Program to find the greatest number?
The greatest number is infinity.
