Flashcards in Geology Deck (29):
Rocks formed from sediments deposited by water, wind or ice. The sediments are cemented together in layers, under pressure.
The wearing away and removal of soil and rock by natural elements, such as wind, waves, rivers and ice, and by human activity
Flat, open land beside a river where sediments are deposited during floods
Large bodies of ice that move down slopes and push boulders, rocks and gravel in front of them
Deposit left by movement of a glacier
A sedimentary rock with medium-sized grains. The sand grains are cemented together by silica, lime or other salts.
A fine-grained, sedimentary rock without layering
A fine-grained sedimentary rock formed in layers by the consolidation of clay
A sedimentary rock with a particle size between that of sandstone and mudstone
Sedimentary rock containing large particles of various sizes cemented together
A sedimentary rock formed from the remains of sea organisms. It consists mainly of calcium carbonate.
A sedimentary rock formed from dead plants and animals that were buried before rotting completely
A sedimentary deposit formed when a salt lake or seabed dried up. Its main chemical is sodium chloride.
A metamorphic rock is a type of rock which has been changed by extreme heat and pressure
Alteration of the composition or structure of a rock by heat, pressure, or other natural agency.
Rocks mined to obtain a metal or other chemical within them
Extraction of natural resources from the Earth
Environmental impact statement
Study of the possible effects of a planned project on the environment
Restored to its previous condition
Waste rock removed from below the topsoil. This rock is replaced when the area is restored.
Any remains, impression, or trace of an animal or plant of a former geological age; evidence of life in the past
The buckling of rocks. It is caused when rocks are under pressure from both sides.
A scientist who studies fossils
The age of a rock compared with the age of another rock
Animal that eats other animals
Animals that eat dead plant and animal material
Cavity in a rock that shows the shape of the hard parts of an organism; types of fungi found growing on the surface of foods
Fossils that provide evidence, such as footprints, that an organism was present when the rock was formed