Probably because both igneous and metamorphic rocks are formed by means other that don't allow for fossils to be preserved.For example, igneous rocks iare made of cooled magma and the only way a fossil would emerge would be through falling into the magma and not melting.
Igneous rock is formed by the cooling of magma - liquid or molten rock. Fossils won't be found in there for obvious reasons. We don't even bother to look for fossils in something like, say, basalt, which is an igneous rock. A link is provided to the Wikipedia article on igneous rock.
I would not call it "rare" but it's not very common. It's metamorphosed limestone so associated with major orogenies.
Their composition of soft materials.
Yes, rhyolite is considered rare. It is considered rare because it is considered a type of advanced igneous volcanic rock.
"Aphan" is not a commonly recognized term. It may be a misspelling or a rare word. Can you provide more context or clarification?
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.
This is because igneous and metamorphic rocks are created under extreme heat and pressure, and very few fossils would survive those conditions. The most common forms of fossils are those found in sedimentary rocks.
Igneous rock is formed by the cooling of magma - liquid or molten rock. Fossils won't be found in there for obvious reasons. We don't even bother to look for fossils in something like, say, basalt, which is an igneous rock. A link is provided to the Wikipedia article on igneous rock.
Metamorphic rocks do not typically contain fossils, as the intense heat and pressure involved in their formation often destroy any remnants of organic matter. Igneous rocks are formed from molten material and do not contain fossils. Sedimentary rocks, which form from the accumulation and compression of sediments, are the type of rock that commonly contain fossils.
Fossils abound in sedimentary rock, you are in fact very likely to find them there.
fossils almost allways occur in sedementary rock. this is the only way to get fossils without burning or cruching the fossil. you sometimes get fossils in igneous rock, but this is very rare. igneous rock fossils do not have any actual "fossils" in them, they are just impressions.
I would not call it "rare" but it's not very common. It's metamorphosed limestone so associated with major orogenies.
1dr51sgf61
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
Yes. I found 3completely rare fossils by digging.
Yes, fossilisation is a rare process especially on land. There will have been many species not preserved as fossils but it would be impossible to prove as there are no remains. It is also possible that many species were preserved in rocks but, due to tectonic processes, they were obliterated as the rocks were metamorphosed.
Generally, fossils are found in sedimentary rocks because other rocks (igneous and metamorphic) would expose fossils to too much heat while the rocks formed. However, there are rare exceptions to this.