0
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.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
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
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.
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.
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.
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.
One reason the Precambrian rock record is difficult to interpret is because its rocks?
It's rocks are severely bent and folded.
