Terms in this set (30)
An arch-shaped fold.
A quaking, shaking, vibrating, or upheaval of the ground.
A crack in rocks where there is relative movement between the rocks on either side.
The actual place where seismic waves originate beneath the surface of the Earth.
Bends in layered rock.
principle of uniformity
The frame of reference that the geologic processes you see changing rocks today are the same processes that changed them in the past.
A scale used to report earthquake magnitude.
The adjustment to stress.
A force that tends to compress, pull apart or deform a rock.
A trough-shaped fold.
A large ocean wave that can be generated by an earthquake, landslide, or volcanic explosion.
A hill or mountain formed by the extrusion of lava or rock fragments from magma below.
A deposit of sediments at the mouth of a river.
A low mound or ridge of sand or other sediments.
The process of physically removing weathered materials.
The wide, level floor of a valley built by a stream.
A mass of ice on land that moves under its own weight.
Features of the Earth's surface such as mountains, plains, plateaus, hills, valleys and canyons.
The erosion caused by gravity. Also called mass wasting.
A mixture of unconsolidated weathered earth materials and humus (altered, decay-resistant organic matter.)
The movement of eroded materials by agents such as rivers, glaciers, wind or waves.
The breaking up, the crumbling and the destruction of any kind of solid rock.
There are three types: mechanical, chemical and biological.
The major blocks of time in Earth's geologic history.
The time spans that divide periods of geologic history.
The time spans that divide an eon.
For example, the Phanerozoic eon is divided into three eras: the Paleozoic, Mesozoic and Cenozoic eras.
Any evidence of ancient organisms in the history of life.
Distinctive fossils of plant or animal species that were widely distributed over Earth but lived only a brief time with a common extinction time.
The time spans that divide eras.
The age of rocks measured by the radioactive decay of unstable elements within the crystals of certain minerals
A time break in the rock record.