Which fossils are formed by sediments and found in sedimentary rock?
A. a mold of a fish skeleton and a cast of a clamshell
B. a cast of a clamshell and a frozen animal
C. a frozen animal and a piece of petrified wood
D. a piece of petrified wood and a preserved insect
Answer (1)
The correct fossils formed by sediments and found in sedimentary rock are a mold of a fish skeleton and a cast of a clamshell. Other options mentioned involve different preservation processes not related to sedimentary formations. Mold and cast fossils are created specifically when sediments fill impressions or are formed from the remains of organisms. ;
