Sand is composed of small rock particles derived from larger particles which have undergone weathering and erosion.
No, deserts form only under certain geographic conditions.
That question can only be answered by a question. Why do you think animals form the best fossils? This question is only a opinion.
A lamprophyre is a type of ultramafic intrusive igneous rock. It is very rare for fossils to be formed in igneous rocks (and they usually only form as mold fossils in extrusive deposits). As such fossils will not form in lamprophyres.
The only thing all deserts have in common is low rainfall.
Sedimentary rocks
For a deceased animal to fossilize its needs to be covered in sediment right after it passes away. Sediment can included, the sea floor, lava and even sticky tar.
This is because some of the things that existed were eaten by other things and so ceased to exist.
It would only change two things: no deserts on earth, and no animals that live in the desert terrain.
because fossils are rare to find and in complete form even more rare only 10% or less out of 100% fossils have been found on earth
Many environments are not suitable for fossil formation.
Sedimentary rocks form from the accumulation and cementation of sediments, which can entomb and preserve the remains of plants and animals as fossils. Igneous and metamorphic rocks form from molten material or intense heat and pressure, which would destroy any fossils present.
No, deserts can only form in areas with specific geographic conditions - such as a rain shadow.