sandstone, limestone, and shale

marine animals belonging to the phylum Mollusca and the class Cephalopoda

layered colonial structures predominately formed by cyanobacteria

1. a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.

a fossil that is useful for dating and correlating the strata in which it is found.

cause (light or shadow) to appear on a surface.

microscopic fungi that live on plant or animal matter

the approximate age of a specific rock layer

Absolute dating is the process of determining an age on a specified chronology in archaeology and geology

The geologic time scale or geological time scale is a representation of time based on the rock record of Earth.

shows us when specific types of organisms appeared, went extinct, or changed

fossilised faeces of animals that lived millions of years ago

a type of fossilization that happens when minerals transported by water fill in all the open spaces of an organism or organic tissue

the process by which organic matter exposed to minerals over a long period is turned into a stony substance

the complex process of concentrating and purifying carbon by denaturing organic matter with heat in the presence of little to no oxygen.

one of the principles of geology scientists use to determine the relative ages of rock strata, or layers

a hole or tunnel dug by a small animal, especially a rabbit, as a dwelling.

a scientist who studies fossils.

any of various hard natural resins (as amber or some copals) usually found in the earth as exudates of trees long dead.

the action or process of replacing someone or something.