Earth Science Chapter 8 - The Rock Record

Using the isotope of carbon to date rocks

The principle that a fault or body of rock is youner than any other body that it cuts through

A break in the geologic record created when rock layers are eroded or exposed

When sand is deposited, sandy sediment forms curved beds at an angle called

One way to estimate absolute age is

A fossilized mark that formed by the movement of an animal within sedimentary rock

Before Hutton made his conclusions, people believed the Earth to be ____ years old.

As the sediments accumulate, they are compressed and hardened into rock layers called

The age of an object in relations to the ages of other objects

When minerals precipitate from solution and replace original organic matter

Small waves that form on the surface of sand due to water or wind

Can index fossils give you an absolute age of rocks?

The study of fossils

The remains of animals or plants that lived in a previous geologic time

Geologists estimate Earth to be ______________ billion years old.

The numeric age

Sedimentary layers left undisturbed will remain in horizontal layers

A banded layer of sand and silt that is deposited annually in a lake

When organizms get trapped in hardened tree sap

 principle that geo processes that occured in the past can be explained by current geo pro

Which is not a type of fossil?

Which type of unconformity is characterized by stratified rock resting on non-stratified rock

The time requred for half of a sample of radioactive isotope to break down

Which unconformity is characteristed by  overlaying layers being deposited on an eroded surface

The way that remains may be preserved in dry, hot conditions

What scientist came up with the idea that Earth is billions of years old

A way to estimate absolute age in addition to studying erosion, is

Freezing is useful for preserving because

The boundry between two sedimentary beds is called

A fossil that is used to establish the age of rock layers

Which of the following is NOT a type of unconformitity

A method of determining the absolute age of an object by comparing parent and daughter isotopes

The arrangement of layers in which coarse and heavy particles are located in the bottom layers

Atoms of the same element that have different numbers of neutrons