deep time & natural resources

geo terraines of ct

continental crust (laurentia in the west, avalonia in the east), oceanic crust (iapetos), newark (ct valley - rift vally), bronson hill (volcanic island arc). divergent boundry causing the valley

half lives

parent halves each time, daughter gains. (ie. 100,50,25,12.5,6.25) the time it takes for a full half in that situation

eon

An Indefinite and very long period of time.

era

A long and distinct period of history with a particular feature or characteristic

period

A length or portion of time

epoch

a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series in chronostratigraphy. ; the beginning of a distinctive period in the history of someone or something.

precambrian / formation to 550 m yrs ago

88 percent of all geological time. first one and multi-celled organisms.

What is one radioactive half life?

The amount of time it takes for half of the isotope to change from the parent isotope to a daughter isotope

igneous rocks

dark colored, heavy weight, have little holes. melting and melted lava cooled.

sedimentary rocks

light colored, light weight, roundness. weathering and then compaction.

metamorphic rocks

banded light and dark color, usually squished or folded. heat and pressure

weathering

the breaking down or dissolving of rocks and minerals on the surface of the Earth (mechanical weathering and chemical weathering)

erosion

transports the bits of rock and mineral away

deposition

when flowing water slows down, the eroded rock and sediments settle in a new place in a process

solution

when the materials (mimicked by salt) are in the water and dissolved, and it becomes part of the dissolved load (carried in solution)

suspension

when the material is bigger and the water is turbulent, its because the material or particles are suspended in the water. (suspension)

saltation

when the material gets even bigger, these particles get picked off the base of the river and get bounced around. (saltation)

mineral resource

a volume of rock (or liquid) enriched in one or more useful materials

correlation

the process of showing that rocks or geological events occurring at different locations are of the same age