Exam 24: Geologic Time

Another name for cyanobacteria, the earliest evidence of ancient life, is

The Cretaceous is a(n)

The concept of uniformitarianism was developed by ______________, the "father of geology."

The Paleocene is a(n)

The Shroud of Turin, the Iceman, and the Dead Sea Scrolls were dated by use of

The organisms called ______________ were the first organisms with eyes and were wiped out at the end of the Paleozoic era.

Sea lilies are more scientifically called _________________.

Tracks, borings, and burrows are examples of

The Oligocene is a(n)

New material filling a mold forms a ______________ of the original shell or bone.

If a rock sample contains uranium and lead, but no lead-204 is present, then

The term age of ancient life is sometimes used to refer to the ______________ era.

Amber is fossilized

Because sediments are not deposited continuously in a given locality over time, breaks called ______________ occur in the rock record.

Potassium-40, one of the six major radionuclides used for radiometric dating, decays to

Fossilized tree resin is known as

Any indication of prehistoric life preserved in rock is called

The oldest evidence of life on Earth dates back to about how many years ago?

Lead that comes from radioactive decay is called ______________ lead.

Trilobites lived during which era?