Fact 1: If fossils of a water animal or plant are found in a place then that place used to be covered by water in the past.

Fact 2: Graptolites , in deep-water deposits, are the dominant fossils.

Given the two facts above, answer the question "what are found in place to indicate a place used to be covered by water?" with the following options: 
- mussels
 - Sea urchins
 - Conifers
 - patch reefs
 - graptolites
 - loose dirt
 - cartilage
 - Sediment


 

     graptolites    