Geologic Time Quiz

What is the starting point of formal geologic time?

• The Hadean Eon

• The Archean Eon

• The Mesozoic Era

• The Phanerozoic Eon

Which eon is considered an informal interval that extends from about 4.6 billion years ago to 4.0 billion years ago?

• The Mesozoic Era

• The Hadean Eon

• The Phanerozoic Eon

• The Archean Eon

What is the 'calendar' for events in Earth history called?

• Fossil record

• Stratigraphy

• Geologic time scale

• Geochronology

What is the chief means of establishing a geologic time scale?

• Evolutionary changes

• Fossil forms

• Rock strata

• Radiometric dating

Which chart is widely used to show the relationships between various intervals of geologic time?

• Geologic Time Chart

• Stratigraphic Chart

• International Chronostratigraphic Chart

• Geologic Time Scale

What is the line between the early Precambrian age and the Paleozoic age formations in the Grand Canyon called?

• The Great Unconformity

• The Grand Canyon Divide

• The Sedimentary Boundary

• The Precambrian-Paleozoic Line

Which period had the most catastrophic extinction event?

• The Permian Period

• The Mesozoic Era

• The Phanerozoic Eon

• The Archean Eon

What is the correlation and classification of rock strata called?

• Geochronology

• Radiometric dating

• Fossil record

• Stratigraphy

Which eon extends from 4.0 billion to 2.5 billion years ago?

• The Mesozoic Era

• The Phanerozoic Eon

• The Archean Eon

• The Hadean Eon

What is the term for the extensive interval of time occupied by the geologic history of Earth?

• Stratigraphy

• Geochronology

• Fossil record

• Geologic time