An index fossil is formed from the remains of an animal that evolved and lived for a precisely defined (and hopefully short) period of time, they are used to define and identify geologic periods. The best index fossils are wide spread (globally) and numerous (commonly found). They frequently (but not always) bottom dwelling or burrowing organisms with hard parts to their body structure because such organisms are most likely to regularly leave remains that can be fossilized.
A True form fossil is a fossil of the whole/entire body of the organism.
Probably, carbonateous fossil.
Burning fossil fuels releases carbon into the atmosphere in the form of CO2. Yes.
It is: 4.2*10^2 when in scientific notation
Fossils could form in shale. Halite is table salt, a mineral with a crystalline structure that is not compatible with understood fossil formation methods.
yes not all the conditions but some.
yes not all the conditions but some.
Hard parts/quick burial
When an animal or plant dies, usually the remains are eaten or decompose. On occasion though, they get buried by mud or sediment, and in the right conditions, they harden into fossils.The bones or original material decay, and water or other things seep into the impression left by the original material. This water and minerals continue to dissolve the original material, replacing it, and then they harden over time.So, right condition, pressure of the mud on top it is most needed to form a fossil
Heat, Pressure, Hydrocarbons, time
Index fossils (also known as guide fossils, indicator fossils or zone fossils).
It takes several millions of years for a fossil to be created. First an animal may step in mud whichs dries over time and becomes hard. After it has that mold the conditions have to be right for it to form. If they are then it will form.
"index" is the singular form - "indices" is the plural :)
It is: 2*5*7 = 70 and no indices are needed
A low point for water to converge.
The working conditions in the places that the workers worked at...they needed to be more sanitary.
More than just two conditions are needed, but the two most important ones are convective instability and wind shear.