Geologic History Test Review

Which radioactive element is used for age of wood tools used by humans during the last ice age?

An unconformity between two sedimentary layers is most likely caused by...

Which period was most of the surface bedrock of the Catskills formed?

Index fossils are usually organisms which had a...

According to the ESRT between which two cities in New York would the oldest bedrock be found?

The fossil record indicates that most of the plants and animals that lived on Earth in the past

Trilobite fossils from different periods show small changes in appearance due to...

Which rock unit is the youngest? BE CAREFUL

According to the ESRT, which event occurred at the same time as the Alleghenian Orogeny?

Trilobite fossils found in shale bedrock in Albany, New York, indicate that this area once

According to the ESRT, which rock is most likely the oldest?

Which two forms of life existed together on the Earth during the same time period?

The changes in the fossil record from the Precambrian to the Cenozoic provide evidence of

What would be the best method of correlating the rock layers outcrops 1000 miles apart?

For which geologic period are no fossils found in New York State?

Why are volcanic ash deposits important to geologists?

According to the ESRT, which of the following cities is located on the youngest bedrock?

Geologists have subdivided geologic time into units based on

What does the line XY represent?

What characteristics of fossils are most useful for correlating sedimentary rock layers?

A rock containing U-238 was crushed. The half-life of the U-238 in each fragment is

Which feature in a sedimentary rock layer is older than the rock itself?

Living corals are found in warm shallow seas, fossil coral has been found in Alaska, this suggests

For which segment of the Earth's geologic history are fossils rarely found?

How much of a 400 g sample of U238 would be left after 9 billion years?

From fossil study, what can be inferred about most organisms that have lived on Earth?

Unless a series of sedimentary rock layers has been overturned, the bottom rock layer usually

According to the ESRT, studies of the rock record suggest that

Which radioactive substance would be used to date recent plant remains in sedimentary deposits?

Why is carbon-14 not usually used to accurately date objects more than 50,000 years old?