It varies depending on the environment where it fossils and the type of organism:
1-Conservation of organs without modification or with discrete modifications (recrystallization). Is the usual case of hard parts (shells, bones, teeth, calcareous algae ...), and exceptionally soft parts in very particular conditions: ahem. mammoths conserved in icy soils of siberia or in hydrocarbons (ozokerites) north of the Carpathians, insects included in fossil resins (baltic amber).
2-Conservation of organs after their replacement by a different subject preserbando its structure with more or less detail. (It is a process called metasomatism) ahem. silicification of trunks of trees, vertebrate bones or the pyritization of ammonites.
3-Conservation in the form of mold of the organism, internal or external to it. It is often the case of ammonites, shells or conches.
The fossilization process is said to start at 100ºC and pressures above 1Kb (kilobar). Conyeva an exchange of atoms, between the original organism and the matter that surrounds it. They are called fossiligenetic processes. Some of the processes are: carbonation, silicification, phosphatization, pyritization, dissolution.
How First Nations were forced to change over-time due to the influx of Europeans.
First Nations had to change the way that their typical lifestyle was, because of the new settlers.
They abandoned their traditional lifestyle and had to work labour in industries owned by new settlers; they would also get paid less.
Their things got taken away.
Aboriginal children were put into residential schools where they were being mistreated.
Since more settlers kept coming, they would leave their homes because there wouldn’t be enough food production; the Europeans cut down their trees and took away their land, leaving them empty handed.
Aboriginals have been mistreated throughout a long period oaf time, everyone deserves their human rights, and they should not abuse their power.
This was a paragraph I wrote for my class, however I dropped the class cuz I was to advanced
I only know the second one sorry but it was fought by the Yorktown river in Yorktown Virginia
Imperialism would probably be the most significant factor, but nationalism and militarism were also important.