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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.
Which era immediately follows the Precambrian?
The era that immediately follows the Precambrian is the Paleozoic Era. It is characterized by the diversification of life forms, including the rise of fishes, insects, and amphibians.
How are animals from the Precambrian era generally characterized?
The animals in the Precambrian Period were soft bodied animals. This Era was dominated by single celled organisms: algae, bacteria. Also in existence were jellyfish, spiders, crabs, and worms.
According to the precambrian rock record much of earth's first free oxygen combined with what?
Iron
The lack of Precambrian index fossils is the primary reason that?
correlation between rock units is impossible
Why is it difficult to interpret the rock record of precambrian time?
It's rocks are severely bent and folded.
What silicate mineral is characterized by striations?
a rock
Which is a factor that prevents us from finding the Precambrian fossils?
most rock form that era are deeply buried.
Why is PreCambrian called PreCambrian?
Precambrian is BEFORE the Cambrian period!
Where can igneous rocks be found in Colorado?
Igneous rocks can be found in the mountains, which are partially composed of Precambrian plutonic rock.
One reason the Precambrian rock record has been difficult to interpret is that it's rocks?
are severely bent and folded
Where do most of our history of precambrian rocks come from?
Most of our knowledge of Precambrian rocks comes from studying exposed rock outcrops on the Earth's surface, as well as from drilling deep boreholes and mining operations. Additionally, information about Precambrian rocks can be gleaned from geophysical surveys and satellite imagery.
