Any trace mark or remains of an organism at least 10000 years old usually preserved in sedimentary rock is called?
It's usually called a fossil.
Firstly, you need physical protection so that predation does not destroy them. Secondly the chemical environment needs to be inimical to the reactions which cause decomposition. This usually means an absence of oxygen, for instance in a peat bog. Another way remains can be preserved is if they are very cold, for instance in a glacier.
A fossil is any evidence of ancient life that is preserved in stone or other material. Fossils can include molds, casts, defecation material, stomach stones, bones, footprints, trails and burrows. Fossils can be preserved in sedimentary rock (and rarely metamorphic and igneous rock), tar pits, and amber, and are usually the result of the organism being covered rapidly upon death. Fossils are very important in helping us trace the history of life on Earth and…
The sediments that form the sedimentary rock initially cover the remnants of dead organisms. This may protect the remnants from further decay or predation. The high temperatures involved in forming igneous rocks will generally destroy organic remains, and metamorphism usually destroys any fossils present in the rock.
Well, sediment is usually a variety of things mixed together, like soil. In soil, you can see many different things, that's because sediment can contain things such as, dirt itself, leaves, dead organisms-such as plants and remains of animals (like if an animal was killed by another, the dead remains would decompose into small pieces). So, if sedimentary rocks (which basically is compacted soil/dirt) are red, it's something that got mixed into the sediment.
Sedimentary rocks are made by cementation and compaction. Usually this happens in the bottom of a lake, pond, etc. Sedimentary rocks are made up of animal remains, old shells, overall anything that the "cement" can cling onto. this whole process can take millions of years! To the person that flagged this question, the guy above isn't lying, he just forgot to say that pressure and heat from within the earth combines sediment to create layers…
Fossils usually form when the remains of an organism are buried gently under sediments which later turn into stone. Intrusive igneous rocks form at depths within Earth where no life is found. Extrusive igneous (volcanic) rocks are so hot when they are deposited that any remains of organisms are usually incinerated. Fossils do occur in volcanic rocks, but very rarely.