section 4 looking at fossils Flashcards
1
Q
the remains of physical evidence of an organism preserved geologic processes
A
fossil
2
Q
a fossilized mark that is formed in soft sediment of an animal
A
trace fossil
3
Q
a mark or cavity in a sedimentary surface by a shell or other body
A
mold
4
Q
a type of fossil that forms when sediments fill in the cavity left by decomposed organism
A
cast
5
Q
a fossil that is found in the rock layers of only one geologic age and that is used to established rock layers
A
index fossil
