3/22/2008 12:30:00 AM
Sedimentary Rock Rock formed at or near earth's surface from fragments or dissolved constituents of pre-existing rocks . 1. clastic sedimentary rocks rock fragments (sediments) cemented together sediment . rock gravel or
4/2/2008 11:26:00 AM Running surface water Formation of streams and drainage networks Runoff surface water moving downslope Initial sheetwash follows topographic lows, or cuts down through weaknesses in the substrate to form streams Streams extend u
Refractive Index RI = speed in vacuum/ .
3/20/2008 12:54:00 PM
Effects of refractive index 1. path of light is refracted (bent) when passing btwn substances w/ different RI's 2. Critical angle o Light rays approaching an interface at an angle g
3/26/2008 11:44:00 AM
. opal is a silicic gel = tiny transparent spheres carry gel in a uniform 3D grid silicic solutions are trapped in spheres in spaces of light Precious opal (gem quality) Silicic spheres are uniform in size & orderly arrang
Oil & Gas Natural gas, oil, and tar are all hydrocarbons.
3/26/2008 2:57:00 PM
Oil & Gas formation 1. microscopic plankton (algae + animals) in body of water (lake or ocean) die, settle to oxygen-poor. 2. . 3. burial (increased temp. .. 4. furt
Geological Influences on Society
The solar system:
The sun is in the center
8 major planets and their moons
smaller chunks of material (asteroids, comets, space dust)
Pluto planet status removed and is now known as a dwarf planet.
Moving out fr
Lecture 18: Streams and Drainage
RUNOFF is the amount of rainfall that flows over the land, rather than sinking into the soil or
OVERLAND FLOW is sheets of water with no channel.
STREAMFLOW is streams of water in channels.
A DRAINAGE BAISIN i
Massmovement(1):Mass movement is the movement of surface material caused by gravity.
Landslides and rockfalls are examples of very sudden movements of this type. Of course
geological agents such as water, wind and ice all work with gravity to cause a leve