Depositional Environments
Types of Sedimentary rocks
Clastic sedimentary rocks
Examples of sedimentary structures
Pre- lab quiz
100
The piling of sediment down a dune or ripple causes this to form.
What is cross bedding?
100
this is formed by weathered rock fragments
What is clastic?
100
This named sediment is very fine, less than 1/256mm.
What is clay?
100
This shows how uniform the grain size is
What is sorting?
100
Clastic sedimentary rocks are subdivided according to this
What is particle size?
200
location where sediment accumulates
What is depositional environment?
200
This type of sedimentary rock is when minerals crystalize directly from water
What is chemical?
200
Conglomerate and Breccia are this Clastic Texture.
What is coarse?
200
This can describe deep sea floor, river bars or beaches, or a numerical measurement
What is layer thickness?
200
This sedimentary structure what likely produced here
What is on a floodplain?
300
Deposited above sea level
What is Terrestrial environments
300
These sedimentary rocks are carbon rich remains of plants
What is organic?
300
Siltstone is made up of this sediment
What is quartz and clay?
300
Small dunes of sediment that make smooth ridge and valley patterns
What are ripple marks?
300
This MINERAL is associated with evaporite deposits
What is gypsum?
400
Deposited at or below sea level
What are Marine environments?
400
These sedimentary rocks are cemented shells of organisms
What is biochemical
400
Sandstone is made up of this particle size.
What is medium?
400
Layers that are locally deposited at a district angle to the overall direction of layering.
What is cross bedding?
400
This sedimentary rock is produced by weathering and erosion of pre-existing rocks?
What is clastic?
500
Sandstone is likely deposited in what type of environment
what is desert sand dunes?
500
Coal is formed by this
What is biologic sedimentary rock?
500
This rock has over 2mm particle size and is made up of angular gravel particles.
What is breccia?
500
Fragments (broken or whole) or other evidence of plants and animals (where the particular plants or animals lived)
What are fossils?
500
A process that involves burial, compaction, and cementation
What is Lithification?