The answer is Proterozoic.
Fossils are the mineralised remains of organisms and contain no organic material.
There are three basic types of rock; sedimentary, igneous and metamorphic. Igneous rocks are formed by volcanic action and don't contain fossils. Sedimentary rocks are formed, usually under water, by eroded material accumulating. Metamorphic rocks are formed when sedimentary rocks are changed by heating and/or pressure. From this, you can see that sedimentary rocks are the most likely to contain fossils, although metamorphic rocks also can contain fossils. Any sedimentary rock can contain fossils, but some make fossil hunting easier. Shales and mudstones are particularly good; chalk is pretty much entirely made of fossils - it's formed of skeletons of small organisms, but its difficult to see the individual fossils.
An unhealthy aquatic system would contain little to no life. This could be due to algae blooms, which deplete a system of dissolved oxygen very rapidly. This causes many organisms to perish.
they can, but they are mostly found underground
sedimentary bedrock
Fossils are the mineralised remains of organisms and contain no organic material.
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.
They don't belong to any kingdom as they are not confirmed as fossils.
Basalt is an igneous rock that forms from the cooling of lava, and it typically does not contain fossils. Fossils are more commonly found in sedimentary rocks where the remains of organisms are preserved in layers of sediment over time.
fossils
dose sedeimentry contain fossils
Sedimentary rocks that formed organically typically contain calcite. Fossils are most likely to be found in sedimentary rocks.
No. In general, there are no fossils in igneous or metamorphic rocks, because the high heat and pressure involved would destroy any fossils. Fossils are almost always found in sedimentary rock.
Because organisms that became index fossils lived only during specific intervals of geologic time, geologists can estimate the ages of rock layers based on the particular index fossils they contain.
Animal fossils contain hydroxyapatite from bones.Plants contain carbon.
fossils
Fossils. Fossils are traces or remains of ancient organisms that are often found preserved in sedimentary rocks. These rocks are formed from the deposition and solidification of sediment over time, providing an ideal environment for the preservation of fossils.