Geologic History of NYS Pages 6 and 7

Front

What is the Cambrian Period known for?

Back

The Cambrian Period is known for the 'Cambrian Explosion,' a time when a significant increase in the diversity of life forms, particularly marine organisms like trilobites, occurred.

Front

What is a trilobite?

Back

A trilobite is an extinct marine arthropod that lived during the Paleozoic Era, characterized by its three-lobed body structure.

Front

What factors can cause differences in fossils of the same species?

Back

Differences in fossils can arise from evolution, environmental variations, and the age of the fossils.

Front

What is a graptolite?

Back

A graptolite is an extinct colonial organism that lived in the oceans during the Paleozoic Era, often used as an index fossil.

Front

What is the significance of the Late Cretaceous Epoch?

Back

The Late Cretaceous Epoch is significant for the evolution of the earliest grasses and the dominance of dinosaurs.

Front

What type of environment did the Catskill Delta form in?

Back

The Catskill Delta formed in a shallow marine environment during the late Devonian period.

Front

What is the role of fossils in understanding geologic history?

Back

Fossils provide evidence of past life forms and their environments, helping scientists reconstruct Earth's geologic history.

Front

What is the difference between an index fossil and a regular fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period, while a regular fossil may not have such specific time relevance.

Front

What does the term 'Paleozoic Era' refer to?

Back

The Paleozoic Era refers to a major era in Earth's history, spanning from about 541 to 252 million years ago, characterized by the emergence of diverse life forms.

Front

What is the significance of the Eospermatopteris plant?

Back

Eospermatopteris is significant as it represents one of the earliest known land plants during the Devonian period.