GEOLOGY 1010 EXAM 2 (Latest Update
) Questions with Correct
Answers 100% Verified {Grade A} -
CLEMSON
What is key in ID-ing clastic sedimentary rock names? - correct answer - grain size is
key
ex: sand = sandstone
ex: silt = siltstone
Rocks with Gravel sized grains - correct answer Conglomerate (if gravels are
moderate rounded)
Breccia (if gravels are poorly rounded)
Rocks with Sand sized grains - correct answer Sandstone
Rocks with Silt sized grains - correct answer Siltstone
,Rocks with Clay sized grains - correct answer Shale (if layered)
Mudstone (if unlayered)
Chemical Sediments - correct answer - form from chemical weathering (dissolution &
re-precipitation, saltwater evaporation)
- usually compromised of 1 major mineral type (ex: halite = rocksalt, quartz = chert)
- economically viable (b/c almost completely uniform of 1 mineral)
-SORTING AND ROUNDING DON'T APPLY TO CHEMICAL SEDIMENTS
Biogenic Sediments - correct answer - formed from biological activity (animals,
plants)
ex: seashell
- some plants will not decay and make rock instead
,Biogenic Rock Types/Names - correct answer - chalk = tiny shell remains
- limestone = carbonate particles
- coal = plant material
(all effervesce with HCl b/c carbonate is biogenic and reacts with HCl)
Mass Wasting - correct answer - landslides
- Transport of sediment and association materials downhill via gravity
Why are landslides important? - correct answer - is a sedimentary process (erosion
using gravity), hazardous
Slope Stability - correct answer - processes that occur that cause a landslide
Angle of Repose - correct answer - max angle of steepness to still be stable
-CAN VARY A LOT DEPENDING ON OTHER FACTORS
, Moisture Level - correct answer - if no moisture, dry particles will not interact and
stick well so sediments will roll down easily
- If too much moisture, sediment turns into mud & flows downhill easily
- Moderate amount of moisture, adds cohesive force that holds grains in place
Amount of vegetation - correct answer - Little Vegetation, roots not holding well
- lots of vegetation, too many roots breaking up that suck out moisture, and add lots of
weight to the slope
- moderate amount of vegetation, can help hold sediments together and flow water
deeper into the slope and saturate it
What are the types of mass wasting? - correct answer - based on type
1. type of material moving
2. type of movement
) Questions with Correct
Answers 100% Verified {Grade A} -
CLEMSON
What is key in ID-ing clastic sedimentary rock names? - correct answer - grain size is
key
ex: sand = sandstone
ex: silt = siltstone
Rocks with Gravel sized grains - correct answer Conglomerate (if gravels are
moderate rounded)
Breccia (if gravels are poorly rounded)
Rocks with Sand sized grains - correct answer Sandstone
Rocks with Silt sized grains - correct answer Siltstone
,Rocks with Clay sized grains - correct answer Shale (if layered)
Mudstone (if unlayered)
Chemical Sediments - correct answer - form from chemical weathering (dissolution &
re-precipitation, saltwater evaporation)
- usually compromised of 1 major mineral type (ex: halite = rocksalt, quartz = chert)
- economically viable (b/c almost completely uniform of 1 mineral)
-SORTING AND ROUNDING DON'T APPLY TO CHEMICAL SEDIMENTS
Biogenic Sediments - correct answer - formed from biological activity (animals,
plants)
ex: seashell
- some plants will not decay and make rock instead
,Biogenic Rock Types/Names - correct answer - chalk = tiny shell remains
- limestone = carbonate particles
- coal = plant material
(all effervesce with HCl b/c carbonate is biogenic and reacts with HCl)
Mass Wasting - correct answer - landslides
- Transport of sediment and association materials downhill via gravity
Why are landslides important? - correct answer - is a sedimentary process (erosion
using gravity), hazardous
Slope Stability - correct answer - processes that occur that cause a landslide
Angle of Repose - correct answer - max angle of steepness to still be stable
-CAN VARY A LOT DEPENDING ON OTHER FACTORS
, Moisture Level - correct answer - if no moisture, dry particles will not interact and
stick well so sediments will roll down easily
- If too much moisture, sediment turns into mud & flows downhill easily
- Moderate amount of moisture, adds cohesive force that holds grains in place
Amount of vegetation - correct answer - Little Vegetation, roots not holding well
- lots of vegetation, too many roots breaking up that suck out moisture, and add lots of
weight to the slope
- moderate amount of vegetation, can help hold sediments together and flow water
deeper into the slope and saturate it
What are the types of mass wasting? - correct answer - based on type
1. type of material moving
2. type of movement
