Question

Which process always causes a profile to become thinner index fossils?

Answer 1

The process of compression always causes a profile to become thinner index fossils.

Step-by-step explanation:

• When a fossil is subjected to increasing pressure over years of development of layers of earthly material over it, it automatically undergoes compression and is shrunk down to become a thinner index fossil.

• Once the fossil undergoes the process of compression, it becomes extremely hard to excavate it.

• These unexcavated fossils later undergo the process of mineralization and get converted into certain minerals of usually untraceable origin.

Answer 2

The index fossils are fossils of widely organisms that would live shortly in one period. They do help the geologist in matching the rock layers. In order to be a good index fossil it should be widely distributed.Hope this helps.