Earth Science Chapter 8 - The Rock Record

Which isotope dates fossils less than 70,000 years old

When organizms get trapped in hardened tree sap

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

Freezing is useful for preserving because

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

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

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

layers of rock

The numeric age

Sedimentary layers left undisturbed will remain in horizontal layers

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

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

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

Atoms of the same element that have different numbers of neutrons

The boundry between two sedimentary beds is called

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

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

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

Which type of unconformity is characterized by stratified rock resting on unstratified rock

The study of fossils

Geologists estimate Earth to be ______________ billion years old.

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

Which is not a type of fossil?

When minerals precipitate from solution and replace original organic matter

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

Using the isotope of carbon to date rocks

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

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

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

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

Which of the following is NOT a type of unconformitity

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

One way to estimate absolute age is

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

When thick petroleum oozes to Earth's surface. Animals may become trapped

Which isotope dates between 10 million and 4.6 billion years