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"Volcanic ash"
Volcanic ash
Tiny remains of animals and plants in streams come from the mountains. When it rains, these remains are washed down the mountains toward the streams.
carbon films can preserve the delicate parts of plants leaves and insects, and preserved remains can preserve entire organisms.
it depends on how and were they died for example plants turn into peat, then coal animals turn into fossils if they died in the mud or sand animals or plants that are frozen would keep their hair and organs and shape both plants and animals, if nothing happened and they were left out to the elements, would just disintegrate and rot in time
decomposes break down the remains of dead plants and animals.
fossil fuels is what i think the answer is but im pretty sure its fossil fuels
The biological accumulation of the skeletal remains of the plants and animals make up the fossils. A fossil refers to the trace of plants or animals that survived in the past.
Fossil remains
Coal is a solid fossil fuel formed in ancient swamps from the remains of plants and animals under great heat and pressure over millions of years. A liquid fossil fuel formed in oceans from the remains of plants and animals under great heat and pressure of millions of years is called oil.
The hardened remains of plants and animals are typically bones or fossils. Fossils are the hardened remains that are formed due to pressure from being squished between Earth's layers.
Dead Organisms Are Compressed By Dirt or Remains Of Dead Animals.