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Over time we grow layers on the earth, and the depth of ancient material depends on how long ago it was formed.
Some people thought that ancient crust was buried under material that falls to the Earth from space (meteorites and micrometeorite dust). We now know that this space debris falls on the Earth's surface at a rate of roughly 1 million kg to 10 million kg each day. This is a miniscule amount and only adds an invisible layer of dust about 0.000000007 mm thick each day. I would take 4 million years to become 1 cm thick, and in 400 million years would only be 1 m thick, so this is obviously not the answer.
The answer turns out to be (1) erosion by wind and water, moving vast amounts of soil from highlands to lowlands, and (2) tectonic movement of the Earth's crustal plates, floating on the Earth's molten rock mantle, causing one plate to slide up atop the adjacent plate, pushing the lower plate deeper and deeper.
Not all of Earth's ancient organisms are buried deeply. In places where erosion and tectonic plate collisions are at work, we find dinosaur bones lying exposed on the Earth's surface and coal deposits only a few meters or a few hundred meters below the surface. At the top of Mt Everest climbers have found a huge number of ancient oceanic fossils; the top of Mt Everest was once at the bottom of the ancient Indian ocean, pushed over 9 km upward by the collision of the Indoaustralian Plate crashing into the Eurasian Plate.
So some ancient stuff gets buried deeply by the same forces that push other ancient stuff upwards.
What else can I help you with?
What prevents us from finding precambrian fossils?
Most rocks from that era are deeply buried.
What happened to Egyptians before they were buried?
Before being buried, ancient Egyptians underwent a detailed mummification process, which aimed to preserve the body for the afterlife. This involved removing internal organs, treating the body with natron, and wrapping it in linen. Additionally, they were often accompanied by grave goods, such as jewelry, food, and items for use in the afterlife, reflecting their beliefs in immortality and the journey beyond death. The entire process was deeply tied to their spiritual beliefs and societal customs.
Following the Spanish-American War nations in the Caribbean and Central America were deeply in debt to?
European nations
Why did Johnson get us so deeply into Vietnam?
drugs and power
What did christopher Columbus care deeply about?
Gold and silver
What are two forces that can expose deeply buried fossils?
Erosion
Is deeply buried soil bacteria photosynthetic?
No, deeply buried soil bacteria are typically not photosynthetic. They rely on organic matter for energy and are adapted to low-oxygen environments where photosynthesis is not possible.
What was deeply woven into ancient Egypt?
Quilts
Deeply is what part of speech?
Deeply is an adverb, a word that modifies a verb, adjective, or another adverb. Example: After fifty years of marriage, he remains deeply attracted to his wife.
What prevents us from finding precambrian fossils?
Most rocks from that era are deeply buried.
Slope mining is used for deeply buried mineral deposite?
No, if the minerals are deep, slope mining is not possible.
What happens to snow that is deeply buried?
It ends up getting very compact and cold and hard to break up
Which factor prevents us from finding precambrian fossils?
Most rocks from that era are deeply buried.
Example of summary?
Precambrian rocks have been so deeply buried that they have changed by heat and pressure. That's a summary about the Precambrian time.
Which is a factor that prevents us from finding the Precambrian fossils?
The lack of hard parts in organisms during the Precambrian period is a factor that prevents us from finding fossils. The geological processes over time, including erosion and metamorphism, may have also destroyed many Precambrian fossils. Additionally, the scarcity of exposed Precambrian rocks due to tectonic activity can make it difficult to find these ancient fossils.
What time of year is geothermal energy produced?
The idea behind geothermal energy is that the pipework for it is buried deeply enough that the temperature is constant year-round.
What must be dug into earth to reach deeply buried ore?
To reach deeply buried ore, mining companies typically dig shafts or tunnels into the earth. These underground operations often require extensive excavation and the use of specialized equipment to ensure safety and efficiency. The process may involve the use of drilling, blasting, and hauling materials to extract the ore from deep within the earth.
