Clues to Earths Past. Crossword

remains, imprints, or traces of prehistoric organisms that can tell when and where organisms once lived and how they lived
fossils in which the spaces inside are filled with minerals
thin film of carbon residue preserved as a fossil
In swampy regions, large volumes of plant matter accumulate. Over millions of years, these deposits become completely carbonized.
a type of body fossil that forms in rock when an organism with hard parts is buried, decays or dissolves, and leaves a cavity in the rock.
From mold ( cavity in the rock ), mineral-rich water or other sediment might enter the cavity to form new rock and produced a copy.
the original remains of a dead organism; can be preserved in ice, tar, amber, or bog
The original soft parts of organism have been preservered in amber for million of years
Fossilized tracks and other evidence of the activity of organisms
Trails and Burrows made by worms and other animals
remains of species that existed on Earth for a relatively short period of time, were abundant and widespread geographically, and can be used by geologists to assign the ages of rock layers
states that for undisturbed layers of rock. the oldest rocks are on the bottom and the rocks becomes progressively younger toward the top
the age of something compared with other things, is used in geology to determine the order of events and the relative age of rocks.
gaps in rock layers
material moved by erosion
forms when a period of time passes without any new deposition occurring to form new layers of rock. This records a time when the rocks were exposed and eroded
a rise of land to a higher elevation (as in the process of mountain building)
the process by which water, ice, wind, or gravity moves weathered rock or soil
pertaining to or exhibiting structural change
88% of earth's history