Chapter 7 - Sedimentary Rocks Flashcards
Sedimentary Rocks
Sand deposits are exclusive in aeolian (sand dunes) environments and not present in any other sedimentary environment
FALSE
Sedimentary rocks help geologists to study mainlyconditions of the sedimentation at
SURFACE
What is the difference between conglomerate and breccia
Conglomerate grains are rounded and breccia are more angular
What is the main criteria to classify Clastic Sedimentary rocks
GRAIN SIZE
Lithification includes the following process in chronological order from the oldest to the newest
Deposition > Compaction > Cementation
Which rock is mainly composed of the mineral dolomite?
DOLOSTONE
What of the following rocks is NOT a detrital or clastic rock
CHERT
The marks or tracks found on sediments and that were left by organisms are known as
TRACE FOSSILS
Whar sedimentary structure is typical of alternating wet and dry conditions?
MUD CRACKS
Alluvial fans are found in
DESSERT ENVIORNMENTS
A sediment with similar grain sizes is considered well sorted
TRUE
A sediment deposit is considered more mature when it is
WELL SORTED
Degree of similarity of the grain sizes in a deposit or rock is referred as
SORTING
What sediment or grain sizes are more likely to be transported by saltation on a stream
COURSE SAND
What factor increases chemical weathering?
HIGH TEMPERATURES & HIGH HUMIDITY
What of the following minerals is a secondary mineral and the result of chemical weathering
CLAY
Which of the following minerals is more resistant to weathering
QUARTZ
Evaporites are more prone to the following weathering process
DISSOLUTION
Choose the correct order of grain sizes from the smallest to the largest
CLAY > SILT > SAND > GRAVEL
Frost wedging is the result of what kind of surface process?
Physical Weathering
