Sedimentary Flashcards
What are sedimentary rocks referred to as?
Pages of history into the earth
What 4 groups are sed rocks divided into?
Clastic, Biochemical, Organic, Chemical
What do sed rocks consist of?
clasts, grains or other pieces of rocks
What is the journey of a sed rock?
- Weathering, 2. Erosion, 3. Deposition, 4. Lithification
How are boulder, Cobble and pebbles measured?
Boulder over 256mm, Cobble 64-256, pebble 2-64 mm
What are whole rock fragments?
clastic rocks that are made of larger clasts
How would you distinguish a mature vs a not mature clastic rock
Non Mature- Closer to source, poorly sorted, angular
mature- farther from source, sorted well, well rounded
What are names of some clastic sed rocks?
Sandstone, Quartz sandstone, Mudstone, Conglomerate
What are biochemical sed rocks?
Numerous organisms that have evolved the ability to pull dissolved ions out of the solution
What are biochemical Sed rocks shell made of?
Calcium Carbonate
Does an organism’s shell remain when it dies
yes
Where do Fossiliferious Limestone, Micrite, chalk, organic sed rocks, and coal form from?
Dead planet remains
How do chemical sed rocks form?
from minerals that precipitation out of solution
What are sedimentary structures?
features that provide us with clues about the environment in which sets are deposited.
What is a sed bed?
single layer of sedimentary rock with a recognizable top and bottom
