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Which is a factor that prevents us from finding the Precambrian fossils?
most rock form that era are deeply buried.
A life-form in the Precambrian time was?
cyanobacteria
One reason fossils are rarely found in Precambrian rocks is that?
Precambrian rocks contain relatively fewer fossils than rocks from different eras. This may be due to the fact that the rocks from this era were subject to a lot of heat and pressure, or were exposed to erosion.
Why is there and no rock record of the hadean period?
Earth's temperature was too high for solid rocks to form
How does a newly formed rock turn in to sediment?
Over a long period of time, the rock erodes into sediments. These sediments, along with pressure and water, form sedimentary rocks.
How does a precambrian rock form?
The word Precambrian describes the approximate age of the rock, it could be sedimentary, igneous or metamorphic and there are many ways in which these 3 types of rock could form.
When did the black hills form?
About 1.8 billion years ago. A Domical uplift at the end of the Cretaceous period, eroded and exposed the layers of rock down to the Precambrian complex.
Which is a factor that prevents us from finding the Precambrian fossils?
most rock form that era are deeply buried.
What is a brass shield?
A brass shield was a shield crafted form brass, rock, and other metals. This shield was most commonly used bye the Spartans from Greece.
What was earths atmosphere oceans and continents began to form during a period of earths history called?
precambrian era
A life-form in the Precambrian time was?
cyanobacteria
Animals in the preCambrian period?
The group of animalia (animals) did not fully form until the Cambrian period. There is evidence of simple life (single-celled) and small multi-celled life forms from before the Cambrian explosion.
One reason fossils are rarely found in Precambrian rocks is that?
Precambrian rocks contain relatively fewer fossils than rocks from different eras. This may be due to the fact that the rocks from this era were subject to a lot of heat and pressure, or were exposed to erosion.
Did any of the rock that form the grand canyon form during the mesozoic era?
Yes, the Permian Period
Why is there and no rock record of the hadean period?
Earth's temperature was too high for solid rocks to form
What plants existed in the Precambrian period?
There is very little evidence for any plant life in the Precambrian Period. There is evidence in the form of stromatolites (found near Shark Bay in Australia) for bacteria. Some controversial fossils from the 1.25 billion year old Hatakai Shale from the Grand Canyon in the USA suggest that there was plant life in the Precambrian. Creationalist often use this as evidence that evolution is not true.
Did any of the rock that forms the grand canyon form during mesozoic era?
Yes, the Permian Period
