Earth's Landscapes

Front

Evidence of ocean presence

Back

Shark tooth

Front

Evidence of past life

Back

Fossils

Front

Source of silt around fossils

Back

ocean

Front

Evidence from fossils

Back

An ocean was once found here

Front

Rock layer with many skeletons

Back

Bone bed

Front

Youngest rocks in the photo

Back

Rocks at the top

Front

Determining fossil age

Back

Radiocarbon dating

Front

Formation of the Grand Canyon

Back

a river

Front

Study of fossils

Back

Paleontology

Front

Cause of Sharktooth Hill bone bed

Back

A river stopped and started flowing