a mountain formed by rock layers squeezed together

a mountain formed by huge tilted blocks split by a fault

to break down rocks into small pieces naturally

to pick up and remove rock pieces and particles

a mixture of weathered rock,living things,air,water,and humus

material produced by broken down plant and animal remains

a series of horizons from top to bottom

rainwater that soaks into gaps in between rocks

movement of Earth's material downhill caused by gravity

to drop off sediment particles

huge sheets of ice that move very slowly over land

a mixture of many sizes of sediment

sediment that collects in front or along a glacier

a definite, solid structure that occurs naturally

rock formed when lava cools off and hardens

rock formed when you apply pressure to two rocks

rock formed when something happens to a rock and it changes

rocks that change in a never-ending cycle

an order of rock layers from youngest to oldest

the age figured out by comparing rocks

a list of rock layers from oldest to youngest

any imprint or trace of a living thing that is preserved

remains of a living thing that was widespread but not for long

the time it takes for half the mass of an element to change

the age of a rock in years,measured by decay rate

a long stretch of time in Earth's history