Term
|
Definition
natural bodies of land ice that flow- form when snow accumulates to great depths |
|
|
Term
|
Definition
loss of snow and ice by evaporation or melting |
|
|
Term
|
Definition
glacier breaks away chunks of bedrock; exploits pre-existing fractures in bedrock |
|
|
Term
|
Definition
sharp jagged mountain ridges |
|
|
Term
|
Definition
U-shaped valley carved by glacier which is filled with ocean water |
|
|
Term
|
Definition
form when freshwater, glacial ice flows into oceans, breaks into big chunks and floats free; |
|
|
Term
|
Definition
much thinner and more continuous; formed by the direct freezing of ocean water with snow accumulation on top (THINNER/ CONTINUOS) |
|
|
Term
|
Definition
sea ice/frozen ocean water that completely covers sea surface (north pole) |
|
|
Term
|
Definition
all sediment and rock debris that is deposited by glaciers |
|
|
Term
|
Definition
unstratified glacial drift deposited directly by glaciers |
|
|
Term
|
Definition
which makes furthest limits of glaciation; curved pattern |
|
|
Term
|
Definition
markes side of alpine glacial trough where edge of ice touches the wall |
|
|
Term
|
Definition
merge of 2 glaciers; when 2 alpine glaciers converge, their lateral moraines merge and new combined glacier has one moraine then run down middle of combined glacier |
|
|
Term
|
Definition
rounded oval hill formed of till; inverted teaspoon |
|
|
Term
|
Definition
what was on bottom of glacier |
|
|
Term
|
Definition
outwash plain; melt water streams issued from glacier; layer upon layer of sand and gravel carried by meltwater streams |
|
|
Term
|
Definition
sediment deposited by meltwater streams that are flowing in ice tunnels underneath glaciers; long sinuous ridges of sediment that were deposited in tunnels; marks ice tunnels when glacier melts |
|
|
Term
|
Definition
widespread recession of ice sheets (occurs during periods of warming global climate) |
|
|
Term
|
Definition
time period between two glaciations |
|
|
Term
|
Definition
sun is not working as hard to produce; |
|
|
Term
|
Definition
how close earth and sun are; take place every 100 thousand years |
|
|
Term
|
Definition
wobble in earth’s rotational axis with respect to plane of earth’s orbit; 41 thousand year circle |
|
|
Term
|
Definition
change in rotational axis in respect to stars; complete cycle is 26 thousand years |
|
|
Term
|
Definition
3 factors; combined effects of 3 factors corresponds roughly to ice ages of last million years |
|
|