2-4

Front 1

What percent of exposed rocks are sedimentary

Back 1

75%

Front 2

Pricipal of Original Horizontality

Back 2

Sedimentary rocks form horizontal layers or bands

Front 3

Superposition

Back 3

another concept by JAmes hutton it states that younger rocks are on the top while the farther down you go the older the rocks get

Front 4

Weathering and erosion

Back 4

water, air,a nd ice can break down into smaller particles. Erosion moves these smaller particles to locations where they accumulate

Front 5

compacting

Back 5

sediments accumlate and form layers Pressure builds up from above layers.

Front 6

Lithificaton

Back 6

involving compacting or cerementation is the process os sediments becoming sedimentary rocks.

Front 7

Organic Sedimentary Rocks?

Back 7

Organic Sedimentary Rocks: formed from material that was once living

Front 8

Qualificaitons of Detrial rocks

Back 8

Conglomerite of Breccia: pebble or gravel that has been cemented together. Sharp angles is breccia

Front 9

The three other types of Detrail rocks.

Back 9

Sandstone: Made of small, sand-sized grains
Siltstones: Made of small hand sized particles which are smaller then grains of sand
Clay-sized of Shale: clay sized particles even smaller then siltsized particles

Front 10

Examples of Chemical rocks

Back 10

Limestone and rocksalt

Front 11

Examples of organic sedimentary rocks

Back 11

Limestone forms from organic fosilized shells
Coal is an example of an organic sedimentary rock. Created when dead plants are buried under other sediments in swamps

Front 12

chemical sedimentary rocks

Back 12

Chemical rock: are made of solutions which have minerals dissolved in them.Lake dissolves leaving mineral deposits

Front 13

detrail

Back 13

Detrail: actually clastic made of previously existing rock broken down into catagories based on size of particles they consist of.

Front 14

cementation

Back 14

water picks up disovled materials and moves thorugh soil and rock when with quartz or calcite it can act as a glue or cement to hold large rock particles together.